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65 results for “Hydrogen production”
Dataset of "Mn-doped WSe2 as an efficient electrocatalyst for hydrogen production and as anode material for lithium-ion batteries"
<p>The ongoing energy crisis has made it imperative to develop low-cost, easily fabricated, yet efficient materials. It is highly desirable for these nanomaterials to function effectively in multiple applications. Among transition metal dichalcogenides, tungsten diselenide (WSe2) shows great promise but remains understudied. In this work, we doped WSe2 with Mn using a simple hydrothermal method. The resulting material exhibited excellent electrocatalytic activity for the hydrogen evolution reaction, achieving a low overpotential of –0.28 V vs RHE at -10 mA/cm2, enhanced conductivity, and high stability and durability. Moreover, as an anode material in in lithium-ion batteries, the Mn-doped WSe2 outperformed pristine WSe2, reaching discharge and charge capacities of 1223 and 922 mAh g−1, respectively. Additionally, the Mn-doped material maintained a significantly higher discharge capacity of 201 mAh g−1 compared to intact WSe2, which had 68 mAh g−1 after 150 cycles. This work offers novel insights into designing efficient bifunctional nanomaterials using transition metal dichalcogenides.</p>
Discovering indium as hydrogen production booster for a Cu/SiO2 catalyst in steam reforming of methanol
<p>Indium is as an effective H2 production promoter in a Cu/SiO2 catalyst for the steam reforming<br>of methanol. We prepared silica-supported Cu-In catalyst via a urea-assisted co-precipitation method that showed a higher H2 productivity compared to the monometallic catalyst and a H2/CO2 molar ratio of almost 3 at 493 K. By means of XPS, XRPD and HRTEM-EDX along with H2 and CO-TPR, H2O-TPD, and N2O titrations, supported by computational modeling, the superior performances were attributed to an easier H2O activation due to lower oxidation state of the Cu, resulting from the electron density transfer from the InOx phase.</p> <p>Here are available:</p> <p>Hydrogen Temperature Programmed Reduction data;</p> <p>Carbon Monoxide Temperature Programmed Reduction data;</p> <p>Water Temperature Programmed Desorption data;</p> <p>Nitrogen Physisorption data.</p>
Data for: Hydrogen production via methane pyrolysis
<p>This dataset contains information regarding patented methods for the production of hydrogen via methane pyrolysis.</p> <p>The processes described in scientific literature can be divided into three categories: thermal, plasma and catalytic decomposition. [1] The same categories are found in the patent literature.</p> <p>The most popular and currently used methods for making hydrogen are coal gasification, steam methane reforming (SMR) and water electrolysis. </p> <p>Methane pyrolysis can be seen as a suitable alternative and environmentally friendly technology; It consists in the thermal decomposition of methane, with the formation of solid carbon (instead of CO/CO<sub>2</sub>) as reaction by-product.</p> <p>The catalytic methane pyrolysis has been widely investigated. Iron and carbon-based (carbon black, graphite, carbon nanotubes) catalysts are considered the best candidates for industrial implementation.[2]</p> <p>The following patent databases used have been used for data mining: </p> <p>- Espacenet (a free of charge database provided by the European Patent Office), accessed on Sept. 10, 2022</p> <p>- Orbit Intelligence (FamPat database) (a fee-based platform provided by Questel), accessed on Sept. 10, 2022</p> <p>The file titled “<em>Methane pyrolysis _ Espacenet</em>” contains information related to Title, Inventors, Applicants, Publication number, Earliest priority, IPC, CPC, Publication date, Earliest publication, and Family number.</p> <p>The file titled “<em>Methane pyrolysis _ Orbit</em>” contains information related to Priority numbers, Application numbers, Publication numbers, Priority dates, Application dates, Publication dates, Title, Abstract, and Current assignees.</p> <p>Patent searches were carried out by means of keywords and classification/indexing codes. [3, 4]</p> <p>Both IPC (International Patent Classification) and CPC (Cooperative Patent Classification) systems were used.</p>
Methodological and practical lessons learned from exploring the material criticality of two hydrogen-related products
<p>As the European Union embarks on the energy transition, several challenges need to be faced to ensure that this shift is conducted from a holistic perspective that avoids burden-shifting across sustainability dimensions. One of the main concerns refers to the future availability of materials that clean technologies require. Critical raw<br>material assessment serves to guide the management of such mineral resources in a new paradigm of increasing demand. This work delves into the methodological fundamentals of several product-level criticality indicators in order to discuss their implications within the context of the ecodesign of two hydrogen-related products. Overall, criticality is advised to be assessed making use of several indicators. In the case study of a proton exchange membrane fuel cell stack, the combined interpretation of criticality indicators leads to identifying platinum as the main hotspot, while yttrium and lanthanum account for the most relevant criticality contributions in the case<br>study of a solid oxide electrolysis cell stack.</p>
Global Hydrogen Production during high-pressure Serpentinisation of Subducting Slabs—Dataset
<p>Data-set and code for recreating results of:</p> <p><strong>Global Hydrogen Production during high-pressure Serpentinisation of Subducting Slabs </strong></p> <p>A manuscript submitted to G-cubed.</p> <p> </p>
Data and code for 'Worldwide greenhouse gas emissions of green hydrogen production and transport'
<p>This data and code accompanies a Nature Energy article with the title 'Worldwide greenhouse gas emissions of green hydrogen production and transport'. In the article ‘Worldwide greenhouse gas emissions of green hydrogen’, we quantify project-specific greenhouse gas emissions for 1,025 green hydrogen projects in 2030, as well as green hydrogen transport emissions for three transport modes: pipeline, liquid hydrogen shipping and ammonia shipping. This repository entry contains the data and code used to produce the outputs presented in the article.</p>
Towards suitable practices for the integration of social life cycle assessment into the ecodesign framework of hydrogen-related products
<p>The hydrogen sector is envisaged as one of the key enablers of the energy transition that the European Union is facing to accomplish its decarbonization targets. However, regarding the technologies that enable the deployment of a hydrogen economy, a growing concern exists about potential burden-shifting across sustainability<br>dimensions. In this sense, social life cycle assessment arises as a promising methodology to evaluate the social implications of hydrogen technologies along their supply chains. In the context of the European projects eGHOST and SH2E, this study seeks to advance on key methodological aspects of social life cycle assessment when it<br>comes to guiding the ecodesign of two relevant hydrogen-related products: a 5 kW solid oxide electrolysis cell stack for hydrogen production, and a 48 kW proton-exchange membrane fuel cell stack for mobility applications.<br>Based on the social life cycle assessment results for both case studies under alternative approaches, the definition of a product-specific supply chain, making use of appropriate cut-off criteria, was found to be the preferable choice when addressing system boundaries definition. Moreover, performing calculations according to the activity variable approach was found to provide valuable results in terms of social hotspots identification to support subsequent decision-making processes on ecodesign, while the direct calculation approach is foreseen as a complement to ease the interpretation of social scores. It is concluded that advancements in the formalization of<br>such suitable practices could foster the integration of social metrics into the sustainable-by-design framework of hydrogen-related products.</p>
A parametric life cycle framework to promote sustainable-by-design product development: Application to a hydrogen production technology
<p>The European Ecodesign Directive is an effective normative framework that has been extensively proven to support the energy transition of numerous European industrial sectors. From an analytical standpoint, it provides practitioners with the EcoReport tool, a simplified life cycle spreadsheet that is aimed at guiding the development of ecodesign measures of mandatory compliance in European countries. In this regard, several studies have highlighted the limitations of the EcoReport tool when addressing emerging technologies like those tied to the hydrogen sector. These works also propose to further integrate material criticality and social metrics in order to enlarge the scope of the European Directive and foster the shift from ecodesign to sustainable-by-design product development. In this situation, building upon the principles of the EcoReport tool and recognizing the outcomes of the aforementioned critical analyses, the conceptualization of a novel sustainable-by-design framework is presented and applied to a Solid Oxide Electrolysis Cell (SOEC) stack for hydrogen production. The operationalization of the framework is conducted, for the first time in the context of sustainable design, by combining the use of the <em>Brightway2</em> and <em>lca_algebraic</em> Python packages. Overall, the proposed approach succeeds in providing a complete sustainability perspective to the design of emerging technologies. Regarding the tangible lessons learned on the hydrogen-related case study, product concepts are proven to progressively improve the sustainability performance of the technology. It is noticeable that the enhancement of the economic competitivity is more limited than that achieved at the remaining sustainability indicators (i.e., environmental, social and material criticality metrics). In line with the outcomes of the life cycle contribution assessment, multi-criteria decision analysis ratings lead to concluding that a sustainable-by-design SOEC stack product concept should prioritize limiting its material intensity.</p>
Dataset for use with The Role of Hydrogen in Decarbonizing US Iron and Steel Production
<p>Sqlite file containing the database used with the Temoa model to produce the results presented in "The Role of Hydrogen in Decarbonizing US Iron and Steel Production"</p>
Dataset: Facile functionalization of carbon electrodes for efficient electroenzymatic hydrogen production
<p>This dataset contains all of the data used to create the plots in both (i) the main article and (ii) the supporting information.</p> <p>The corresponding journal article can be found here:</p> <p><a href="https://doi.org/10.1021/jacsau.2c00551">https://doi.org/10.1021/jacsau.2c00551</a> </p>
Dataset for "Light and Mass Transport Computations Guide the Fabrication of 3D-Structured TiO2 and Au/TiO2 Aerogel Photocatalysts for Efficient Hydrogen Production in the Gas Phase"
<p>This dataset is related to "Light and Mass Transport Computations Guide the Fabrication of 3D-Structured TiO<sub>2</sub> and Au/TiO<sub>2</sub> Aerogel Photocatalysts for Efficient Hydrogen Production in the Gas Phase" published in <em> Chemistry of Materials</em> <strong>2023</strong> <em>35</em> (10), 3849-3858.</p> <p>Each file contains the dataset for the respective Figure.</p> <p><strong>File 'Figure 1': </strong>Optical Photograph and SEM images of a 3D printed TiO<sub>2</sub> aerogel.</p> <p><strong>File 'Figure 2': </strong>The subdirectory <em>'absorbed'</em> contains data for the calculation of the light absorption of unstructured, sc-structured, and fcc-structured aerogels. A more detailed description is presented in the <em>'readme</em>' file. The subdirectory <em>'flux_time_resolved'</em> contains data for the calculation of the time-resolved flux in a fcc-structured aerogel. A more detailed description is presented in the readme file.</p> <p><strong>File 'Figure 3': </strong>Measured and calculated data of the pressure drop of unstructured, sc-structured, and fcc-structured aerogels. Images of the velocity profile. Images of simulated velocity profiles of an sc-structured aerogel without and with a surrounding wall. The simulations were performed in COMSOL.</p> <p><strong>File 'Figure 4': </strong>Data of the hydrogen evolution experiments.</p> <p><strong>File 'Figure SI1 and Table SI1': </strong>Data of nitrogen physisorption experiments. <em>'Figure_SI1-sample-identification'</em> contains a list to assign the dataset to the respective subfigures in Figure SI1. <em>'Table_SI1-sample-identification' </em>contains a list to assign the dataset to the respective entry in Table SI1.</p> <p><strong>File 'Figure SI2': </strong>Data of the hydrogen evolution experiments with a gas stream containing pure water and a water/methanol mixture, respectively.</p> <p><strong>File 'Figure SI3': </strong>Data of the UV cleaning experiment.</p> <p><strong>File 'Figure SI4': </strong>Chromatograms recorded during hydrogen evolution experiments to discuss the formation of side products.</p> <p><strong>File 'Figure SI5':</strong> Data of two consecutive hydrogen evolution experiments.</p> <p><strong>File 'Figure SI6': </strong>Data of the hydrogen evolution experiments for an fcc-structured and sc-structured TiO<sub>2</sub> aerogel of similar light absorption. Image of a simulated velocity profiles for an unstructured aerogel. The simulation were performed in COMSOL.</p> <p><strong>File 'Figure SI7': </strong>Data of an hydrogen evolution experiments of an fcc-structured TiO<sub>2</sub> aerogel for flow rates in a range of 1.25 to 20 mL min<sup>-1</sup>.</p> <p><strong>File 'Figure SI8': </strong>TEM/STEM images including EDX mapping of an Au/TiO<sub>2</sub> aerogel fragment.</p> <p><strong>File 'Figure SI9': </strong>Data of the hydrogen evolution, the irradiance of the LED, and the amount of water and methanol.</p> <p><strong>File 'Figure SI10': </strong>Attenuated total reflection infrared spectra of TiO<sub>2</sub> nanoparticle powder and aerogel after UV cleaning.</p> <p><strong>File 'Figure SI11': </strong>XRD pattern of TiO<sub>2</sub> nanoparticles and a reference of anatase TiO<sub>2</sub>.</p> <p><strong>File 'Figure SI12': </strong>Data of hydrogen evoltion for TiO<sub>2</sub> nanoparticle powders.</p> <p><strong>File 'Figure SI13': </strong>Transmission and reflectance spectra of a TiO<sub>2</sub> aerogel.</p> <p><strong>File 'Figure SI14': </strong>Calculated transmission and reflectance for an optical thickness and a scattering albedo in a range of 0 to 5 and 0 to 1, respectively. The data was calculated by solving the radiative transfer equation, as implemented in the DISORT algorithm. A more detailed description of the calculation and data processing is provided in the <em>'readme'</em> file. The code of the DISORT algorithm is provided in the <em>'DISORT'</em> subdirectory.</p> <p><strong>File 'Figure SI16': </strong>Data of the derived absorption and scattering coefficient.</p> <p><strong>File 'Figure SI17': </strong>Data of the light absorption and the scattering coefficient. The <em>'readme'</em> file contains a description of the data processing for the light absorption dataset.</p>
Supporting Data - The influence of additionality and time-matching requirements on the emissions from grid-connected hydrogen production
<p>This dataset contains all case input and outputs for the analysis done in <i>The influence of additionality and time-matching requirements on the emissions from grid-connected hydrogen production.</i></p>
Active repair of a dinuclear photocatalyst for visible light-driven hydrogen production
<p>The peer-reviewed publication for this dataset has been published in <em>Nature Chemistry</em> and can be accessed <em>via</em> <strong><a href="https://doi.org/10.1038/s41557-021-00860-6"> DOI 10.1038/s41557-021-00860-6</a></strong>. Please cite this when using the data.</p>
Raw data set for Negative Emissions in the Chemical Sector: Lifecycle CO2 Accounting for Biomass and CCS Integration into Ethanol, Ammonia, Urea, and Hydrogen Production.
<p>This repository contains the raw data and code used to generate the results in the paper:</p> <p>Tanzer S.E., Blok K., Ramirez Ramirez A. Negative Emissions in the Chemical Sector: Lifecycle CO2 Accounting for Biomass and CCS Integration into Ethanol, Ammonia, Urea, and Hydrogen Production. 15th International Conference on Greenhouse Gas Control Technologies, GHGT-15. 2021. doi: 10.2139/ssrn.3819778.</p> <p>also published as chapter 4 in the PhD dissertation ”Negative Emissions in the Industrial Sector”. The PhD was the department of Engineering Systems and Services, Faculty of Technology Policy, Management at the Delft University of Technology, between 2017-2022. </p> <p>This is intended to be a record of the exact data and code used to generate the results and graphics used in this publication. It is not necessarily designed for user-friendliness or tested to work on other machines and may contain extraneous data and files.</p> <p>To make use of the python black box modelling library for your own work, please check out the most recent public release, which can be found at https://zenodo.org/record/5800104#.YjUTnC8w30o</p>
Design principles a heterogeneously catalyzed autothermal reactor with enhanced heat and mass transfer for hydrogen production
<p><strong>Design principles a</strong> <strong>heterogeneously catalyzed autothermal reactor with enhanced heat and mass transfer for hydrogen production</strong></p> <p>Junjie Chen</p> <p>Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p> <p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com</p> <p> </p> <p>Catalysis, in chemistry, is the modification of the rate of a chemical reaction, usually an acceleration, by addition of a substance not consumed during the reaction. The rates of chemical reactions, that is, the velocities at which they occur, depend upon a number of factors, including the chemical nature of the reacting species and the external conditions to which they are exposed. A particular phenomenon associated with the rates of chemical reactions that is of great theoretical and practical interest is catalysis, the acceleration of chemical reactions by substances not consumed in the reactions themselves, substances known as catalysts. The study of catalysis is of interest theoretically because of what it reveals about the fundamental nature of chemical reactions; in practice, the study of catalysis is important because many industrial processes depend upon catalysts for their success. In a catalyzed reaction, the catalyst generally enters into chemical combination with the reactants but is ultimately regenerated, so the amount of catalyst remains unchanged. Since the catalyst is not consumed, each catalyst molecule may induce the transformation of many molecules of reactants. For an active catalyst, the number of molecules transformed per minute by one molecule of catalyst may be as large as several million. Where a given substance or a combination of substances undergoes two or more simultaneous reactions that yield different products, the distribution of products may be influenced by the use of a catalyst that selectively accelerates one reaction relative to the other(s). By choosing the appropriate catalyst, a particular reaction can be made to occur to the extent of practically excluding another. Many important applications of catalysis are based on selectivity of this kind.</p> <p>Streamwise distance (millimeters), Reforming channel centerline temperature (degrees kelvin)</p> <p>0 373</p> <p>0.00025 373.048742</p> <p>0.0005 373.2382942</p> <p>0.00075 373.7354626</p> <p>0.001 374.7081362</p> <p>0.00125 376.2548823</p> <p>0.0015 378.3951976</p> <p>0.00175 381.0814232</p> <p>0.002 384.2247405</p> <p>0.00225 387.7222496</p> <p>0.0025 391.465635</p> <p>0.00275 395.3617454</p> <p>0.003 399.3347598</p> <p>0.00325 403.3218552</p> <p>0.0035 407.2775391</p> <p>0.00375 411.1628179</p> <p>0.004 414.9538621</p> <p>0.00425 418.6311751</p> <p>0.0045 422.1828419</p> <p>0.00475 425.6012807</p> <p>0.005 428.8821587</p> <p>0.00525 432.025476</p> <p>0.0055 435.0312325</p> <p>0.00575 437.9015946</p> <p>0.006 440.6398117</p> <p>0.00625 443.2502165</p> <p>0.0065 445.7371415</p> <p>0.00675 448.1049195</p> <p>0.007 450.3600492</p> <p>0.00725 452.5057803</p> <p>0.0075 454.5475284</p> <p>0.00775 456.4896262</p> <p>0.008 458.3374895</p> <p>0.00825 460.0954509</p> <p>0.0085 461.7689261</p> <p>0.00875 463.3600816</p> <p>0.009 464.874333</p> <p>0.00925 466.3149298</p> <p>0.0095 467.6862047</p> <p>0.00975 468.9924902</p> <p>0.01 470.2348696</p> <p>0.01025 471.4176754</p> <p>0.0105 472.5441571</p> <p>0.01075 473.6175642</p> <p>0.011 474.6389798</p> <p>0.01125 475.6138198</p> <p>0.0115 476.5431672</p> <p>0.01175 477.4302716</p> <p>0.012 478.276216</p> <p>0.01225 479.0831669</p> <p>0.0125 479.8543736</p> <p>0.01275 480.5909193</p> <p>0.013 481.2938872</p> <p>0.01325 481.9665268</p> <p>0.0135 482.6099212</p> <p>0.01375 483.2251535</p> <p>0.014 483.8143901</p> <p>0.01425 484.377631</p> <p>0.0145 484.9170424</p> <p>0.01475 485.4347907</p> <p>0.015 485.930876</p> <p>0.01525 486.4063812</p> <p>0.0155 486.8623897</p> <p>0.01575 487.3010677</p> <p>0.016 487.721332</p> <p>0.01625 488.1264322</p> <p>0.0165 488.515285</p> <p>0.01675 488.8889736</p> <p>0.017 489.2496644</p> <p>0.01725 489.5962742</p> <p>0.0175 489.9309692</p> <p>0.01775 490.2526664</p> <p>0.018 490.5646152</p> <p>0.01825 490.8646493</p> <p>0.0185 491.1560181</p> <p>0.01875 491.4365554</p> <p>0.019 491.7073443</p> <p>0.01925 491.970551</p> <p>0.0195 492.2250926</p> <p>0.01975 492.472052</p> <p>0.02 492.7114294</p> <p>0.02025 492.9432247</p> <p>0.0205 493.1696042</p> <p>0.02075 493.3884016</p> <p>0.021 493.6017832</p> <p>0.02125 493.8086659</p> <p>0.0215 494.0101329</p> <p>0.02175 494.2072672</p> <p>0.022 494.3989857</p> <p>0.02225 494.5863716</p> <p>0.0225 494.7683417</p> <p>0.02275 494.9470624</p> <p>0.023 495.1214504</p> <p>0.02325 495.2915058</p> <p>0.0235 495.4583118</p> <p>0.02375 495.6218682</p> <p>0.024 495.7810921</p> <p>0.02425 495.9381497</p> <p>0.0245 496.0919577</p> <p>0.02475 496.2425163</p> <p>0.025 496.3898255</p> <p>0.02525 496.5360515</p> <p>0.0255 496.679028</p> <p>0.02575 496.8187551</p> <p>0.026 496.9563158</p> <p>0.02625 497.0927934</p> <p>0.0265 497.2260215</p> <p>0.02675 497.3570834</p> <p>0.027 497.4859789</p> <p>0.02725 497.6137912</p> <p>0.0275 497.7383541</p> <p>0.02775 497.8618338</p> <p>0.028 497.9831472</p> <p>0.02825 498.1033775</p> <p>0.0285 498.2203583</p> <p>0.02875 498.3362559</p> <p>0.029 498.4499873</p> <p>0.02925 498.5637186</p> <p>0.0295 498.6666184</p> <p>0.02975 498.796597</p> <p>0.03 498.88</p> <p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p>
Design principles an autothermal chemical reactor with enhanced momentum transport for hydrogen production
<p><strong>Design principles an autothermal chemical reactor with enhanced momentum transport for hydrogen production</strong></p> <p>Junjie Chen</p> <p>Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p> <p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com</p> <p> </p> <p>Chemical engineering is the development of processes and the design and operation of plants in which materials undergo changes in their physical or chemical state. Applied throughout the process industries, it is founded on the principles of chemistry, physics, and mathematics. The laws of physical chemistry and physics govern the practicability and efficiency of chemical engineering operations. Energy changes, deriving from thermodynamic considerations, are particularly important. Mathematics is a basic tool in optimization and modeling. Optimization means arranging materials, facilities, and energy to yield as productive and economical an operation as possible. Modeling is the construction of theoretical mathematical prototypes of complex process systems, commonly with the aid of computers. Study of the fundamental phenomena upon which chemical engineering is based has necessitated their description in mathematical form and has led to more sophisticated mathematical techniques. The advent of digital computers has allowed laborious design calculations to be performed rapidly, opening the way to accurate optimization of industrial processes. Variations due to different parameters, such as energy source used, plant layout, and environmental factors, can be predicted accurately and quickly so that the best combination can be chosen.</p> <p>Streamwise distance (millimeters), Reforming channel centerline temperature (degrees kelvin)</p> <p>0 373.004</p> <p>0.00025 373.049</p> <p>0.0005 373.224</p> <p>0.00075 373.683</p> <p>0.001 374.581</p> <p>0.00125 376.009</p> <p>0.0015 377.985</p> <p>0.00175 380.465</p> <p>0.002 383.367</p> <p>0.00225 386.596</p> <p>0.0025 390.052</p> <p>0.00275 393.649</p> <p>0.003 397.317</p> <p>0.00325 400.998</p> <p>0.0035 404.65</p> <p>0.00375 408.237</p> <p>0.004 411.737</p> <p>0.00425 415.132</p> <p>0.0045 418.411</p> <p>0.00475 421.567</p> <p>0.005 424.596</p> <p>0.00525 427.498</p> <p>0.0055 430.273</p> <p>0.00575 432.923</p> <p>0.006 435.451</p> <p>0.00625 437.861</p> <p>0.0065 440.157</p> <p>0.00675 442.343</p> <p>0.007 444.425</p> <p>0.00725 446.406</p> <p>0.0075 448.291</p> <p>0.00775 450.084</p> <p>0.008 451.79</p> <p>0.00825 453.413</p> <p>0.0085 454.958</p> <p>0.00875 456.427</p> <p>0.009 457.825</p> <p>0.00925 459.155</p> <p>0.0095 460.421</p> <p>0.00975 461.627</p> <p>0.01 462.774</p> <p>0.01025 463.866</p> <p>0.0105 464.906</p> <p>0.01075 465.897</p> <p>0.011 466.84</p> <p>0.01125 467.74</p> <p>0.0115 468.598</p> <p>0.01175 469.417</p> <p>0.012 470.198</p> <p>0.01225 470.943</p> <p>0.0125 471.655</p> <p>0.01275 472.335</p> <p>0.013 472.984</p> <p>0.01325 473.605</p> <p>0.0135 474.199</p> <p>0.01375 474.767</p> <p>0.014 475.311</p> <p>0.01425 475.831</p> <p>0.0145 476.329</p> <p>0.01475 476.807</p> <p>0.015 477.265</p> <p>0.01525 477.704</p> <p>0.0155 478.125</p> <p>0.01575 478.53</p> <p>0.016 478.918</p> <p>0.01625 479.292</p> <p>0.0165 479.651</p> <p>0.01675 479.996</p> <p>0.017 480.329</p> <p>0.01725 480.649</p> <p>0.0175 480.958</p> <p>0.01775 481.255</p> <p>0.018 481.543</p> <p>0.01825 481.82</p> <p>0.0185 482.089</p> <p>0.01875 482.348</p> <p>0.019 482.598</p> <p>0.01925 482.841</p> <p>0.0195 483.076</p> <p>0.01975 483.304</p> <p>0.02 483.525</p> <p>0.02025 483.739</p> <p>0.0205 483.948</p> <p>0.02075 484.15</p> <p>0.021 484.347</p> <p>0.02125 484.538</p> <p>0.0215 484.724</p> <p>0.02175 484.906</p> <p>0.022 485.083</p> <p>0.02225 485.256</p> <p>0.0225 485.424</p> <p>0.02275 485.589</p> <p>0.023 485.75</p> <p>0.02325 485.907</p> <p>0.0235 486.061</p> <p>0.02375 486.212</p> <p>0.024 486.359</p> <p>0.02425 486.504</p> <p>0.0245 486.646</p> <p>0.02475 486.785</p> <p>0.025 486.921</p> <p>0.02525 487.056</p> <p>0.0255 487.188</p> <p>0.02575 487.317</p> <p>0.026 487.444</p> <p>0.02625 487.57</p> <p>0.0265 487.693</p> <p>0.02675 487.814</p> <p>0.027 487.933</p> <p>0.02725 488.051</p> <p>0.0275 488.166</p> <p>0.02775 488.28</p> <p>0.028 488.392</p> <p>0.02825 488.503</p> <p>0.0285 488.611</p> <p>0.02875 488.718</p> <p>0.029 488.823</p> <p>0.02925 488.928</p> <p>0.0295 489.023</p> <p>0.02975 489.143</p> <p>0.03 489.22</p> <p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p>
Design principles an autothermal reactor with enhanced mass transfer for hydrogen production
<p><strong>Design principles an autothermal reactor with enhanced mass transfer for hydrogen production</strong></p> <p>Junjie Chen</p> <p>Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p> <p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com</p> <p> </p> <p>Chemical engineers are employed in the design and development of both processes and plant items. In each case, data and predictions often have to be obtained or confirmed with pilot experiments. Plant operation and control is increasingly the sphere of the chemical engineer rather than the chemist. Chemical engineering provides an ideal background for the economic evaluation of new projects and, in the plant construction sector, for marketing. The fundamental principles of chemical engineering underlie the operation of processes extending well beyond the boundaries of the chemical industry, and chemical engineers are employed in a range of operations outside traditional areas. Plastics, polymers, and synthetic fibres involve chemical-reaction engineering problems in their manufacture, with fluid flow and heat transfer considerations dominating their fabrication. The dyeing of a fibre is a mass-transfer problem. Pulp manufacture involve considerations of fluid flow and heat transfer. The nuclear industry makes similar demands on the chemical engineer, particularly for fuel manufacture and reprocessing. Chemical engineers are involved in many sectors of the metals processing industry, which extends from steel manufacture to separation of rare metals.</p> <p>Streamwise distance (millimeters), Reforming channel centerline temperature (degrees kelvin)</p> <p>0 373.004</p> <p>0.00025 373.059</p> <p>0.0005 373.261</p> <p>0.00075 373.771</p> <p>0.001 374.741</p> <p>0.00125 376.228</p> <p>0.0015 378.219</p> <p>0.00175 380.651</p> <p>0.002 383.434</p> <p>0.00225 386.47</p> <p>0.0025 389.674</p> <p>0.00275 393.013</p> <p>0.003 396.47</p> <p>0.00325 400.02</p> <p>0.0035 403.634</p> <p>0.00375 407.275</p> <p>0.004 410.898</p> <p>0.00425 414.453</p> <p>0.0045 417.9</p> <p>0.00475 421.231</p> <p>0.005 424.454</p> <p>0.00525 427.574</p> <p>0.0055 430.596</p> <p>0.00575 433.522</p> <p>0.006 436.342</p> <p>0.00625 439.041</p> <p>0.0065 441.606</p> <p>0.00675 444.041</p> <p>0.007 446.359</p> <p>0.00725 448.572</p> <p>0.0075 450.693</p> <p>0.00775 452.727</p> <p>0.008 454.676</p> <p>0.00825 456.532</p> <p>0.0085 458.289</p> <p>0.00875 459.952</p> <p>0.009 461.531</p> <p>0.00925 463.036</p> <p>0.0095 464.477</p> <p>0.00975 465.858</p> <p>0.01 467.18</p> <p>0.01025 468.441</p> <p>0.0105 469.635</p> <p>0.01075 470.767</p> <p>0.011 471.843</p> <p>0.01125 472.873</p> <p>0.0115 473.859</p> <p>0.01175 474.805</p> <p>0.012 475.713</p> <p>0.01225 476.579</p> <p>0.0125 477.403</p> <p>0.01275 478.186</p> <p>0.013 478.933</p> <p>0.01325 479.649</p> <p>0.0135 480.337</p> <p>0.01375 480.998</p> <p>0.014 481.634</p> <p>0.01425 482.243</p> <p>0.0145 482.823</p> <p>0.01475 483.376</p> <p>0.015 483.906</p> <p>0.01525 484.415</p> <p>0.0155 484.905</p> <p>0.01575 485.379</p> <p>0.016 485.835</p> <p>0.01625 486.273</p> <p>0.0165 486.692</p> <p>0.01675 487.093</p> <p>0.017 487.477</p> <p>0.01725 487.848</p> <p>0.0175 488.206</p> <p>0.01775 488.553</p> <p>0.018 488.889</p> <p>0.01825 489.212</p> <p>0.0185 489.522</p> <p>0.01875 489.82</p> <p>0.019 490.106</p> <p>0.01925 490.383</p> <p>0.0195 490.651</p> <p>0.01975 490.913</p> <p>0.02 491.168</p> <p>0.02025 491.413</p> <p>0.0205 491.648</p> <p>0.02075 491.875</p> <p>0.021 492.093</p> <p>0.02125 492.306</p> <p>0.0215 492.513</p> <p>0.02175 492.716</p> <p>0.022 492.915</p> <p>0.02225 493.106</p> <p>0.0225 493.291</p> <p>0.02275 493.469</p> <p>0.023 493.642</p> <p>0.02325 493.811</p> <p>0.0235 493.977</p> <p>0.02375 494.141</p> <p>0.024 494.301</p> <p>0.02425 494.456</p> <p>0.0245 494.607</p> <p>0.02475 494.753</p> <p>0.025 494.895</p> <p>0.02525 495.036</p> <p>0.0255 495.174</p> <p>0.02575 495.311</p> <p>0.026 495.446</p> <p>0.02625 495.578</p> <p>0.0265 495.706</p> <p>0.02675 495.831</p> <p>0.027 495.953</p> <p>0.02725 496.074</p> <p>0.0275 496.195</p> <p>0.02775 496.315</p> <p>0.028 496.433</p> <p>0.02825 496.549</p> <p>0.0285 496.661</p> <p>0.02875 496.772</p> <p>0.029 496.881</p> <p>0.02925 496.99</p> <p>0.0295 497.092</p> <p>0.02975 497.232</p> <p>0.03 497.324</p> <p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p>
Process intensification in a chemical reactor with enhanced mass transfer for hydrogen production
<p><strong>Process intensification in a chemical reactor with enhanced mass transfer for hydrogen production</strong></p> <p>Junjie Chen</p> <p>Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p> <p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com</p> <p> </p> <p>Chemical synthesis is concerned with the construction of complex chemical compounds from simpler ones. A synthesis usually is undertaken for one of three reasons. The first reason is to meet an industrial demand for a product. For example, ammonia is synthesized from nitrogen and hydrogen and is used to make, among other things, ammonium sulfate, employed as a fertilizer; vinyl chloride is made from ethylene and is used in the production of polyvinyl chloride plastic. In general, a vast range of chemical compounds are synthesized for applications. Second, an enormous number of compounds of considerable molecular complexity occur naturally. The syntheses of these natural products have usually been undertaken in the context of the determination of the structures of the compounds; if a material is deduced to have a particular structure on the basis of its chemical reactions and physical properties, then the discovery that a compound synthesized by an unambiguous method for this structure is identical to the natural product provides confirmation of the validity of the assigned structure. Third, a synthesis may be carried out to obtain a compound of specific structure that does not occur naturally and has not previously been made. This type of synthesis is performed in order to examine the properties of the compound and thereby test theories of chemical structure and reactivity.</p> <p>Streamwise distance (millimeters), Wall centerline temperature (degrees kelvin)</p> <p>0 501.211</p> <p>0.00025 501.158</p> <p>0.0005 500.999</p> <p>0.00075 500.714</p> <p>0.001 500.254</p> <p>0.00125 499.764</p> <p>0.0015 499.441</p> <p>0.00175 499.3</p> <p>0.002 499.307</p> <p>0.00225 499.312</p> <p>0.0025 499.195</p> <p>0.00275 498.964</p> <p>0.003 498.605</p> <p>0.00325 498.22</p> <p>0.0035 497.936</p> <p>0.00375 497.767</p> <p>0.004 497.696</p> <p>0.00425 497.643</p> <p>0.0045 497.535</p> <p>0.00475 497.367</p> <p>0.005 497.127</p> <p>0.00525 496.875</p> <p>0.0055 496.695</p> <p>0.00575 496.597</p> <p>0.006 496.57</p> <p>0.00625 496.556</p> <p>0.0065 496.505</p> <p>0.00675 496.414</p> <p>0.007 496.275</p> <p>0.00725 496.132</p> <p>0.0075 496.044</p> <p>0.00775 496.017</p> <p>0.008 496.045</p> <p>0.00825 496.079</p> <p>0.0085 496.078</p> <p>0.00875 496.046</p> <p>0.009 495.978</p> <p>0.00925 495.91</p> <p>0.0095 495.887</p> <p>0.00975 495.916</p> <p>0.01 495.987</p> <p>0.01025 496.057</p> <p>0.0105 496.093</p> <p>0.01075 496.099</p> <p>0.011 496.076</p> <p>0.01125 496.056</p> <p>0.0115 496.073</p> <p>0.01175 496.134</p> <p>0.012 496.231</p> <p>0.01225 496.323</p> <p>0.0125 496.38</p> <p>0.01275 496.409</p> <p>0.013 496.413</p> <p>0.01325 496.421</p> <p>0.0135 496.462</p> <p>0.01375 496.541</p> <p>0.014 496.652</p> <p>0.01425 496.755</p> <p>0.0145 496.824</p> <p>0.01475 496.865</p> <p>0.015 496.886</p> <p>0.01525 496.912</p> <p>0.0155 496.967</p> <p>0.01575 497.057</p> <p>0.016 497.176</p> <p>0.01625 497.286</p> <p>0.0165 497.362</p> <p>0.01675 497.414</p> <p>0.017 497.448</p> <p>0.01725 497.486</p> <p>0.0175 497.553</p> <p>0.01775 497.65</p> <p>0.018 497.773</p> <p>0.01825 497.887</p> <p>0.0185 497.968</p> <p>0.01875 498.026</p> <p>0.019 498.069</p> <p>0.01925 498.117</p> <p>0.0195 498.191</p> <p>0.01975 498.292</p> <p>0.02 498.416</p> <p>0.02025 498.53</p> <p>0.0205 498.614</p> <p>0.02075 498.677</p> <p>0.021 498.727</p> <p>0.02125 498.781</p> <p>0.0215 498.859</p> <p>0.02175 498.96</p> <p>0.022 499.08</p> <p>0.02225 499.19</p> <p>0.0225 499.272</p> <p>0.02275 499.334</p> <p>0.023 499.385</p> <p>0.02325 499.44</p> <p>0.0235 499.514</p> <p>0.02375 499.608</p> <p>0.024 499.718</p> <p>0.02425 499.818</p> <p>0.0245 499.892</p> <p>0.02475 499.948</p> <p>0.025 499.992</p> <p>0.02525 500.039</p> <p>0.0255 500.1</p> <p>0.02575 500.178</p> <p>0.026 500.268</p> <p>0.02625 500.349</p> <p>0.0265 500.407</p> <p>0.02675 500.448</p> <p>0.027 500.477</p> <p>0.02725 500.506</p> <p>0.0275 500.545</p> <p>0.02775 500.596</p> <p>0.028 500.656</p> <p>0.02825 500.708</p> <p>0.0285 500.741</p> <p>0.02875 500.757</p> <p>0.029 500.759</p> <p>0.02925 500.755</p> <p>0.0295 500.754</p> <p>0.02975 500.757</p> <p>0.03 500.759</p> <p>Contributor: Junjie Chen, ORCID: 0000-0001-5055-4309, E-mail address: komcjj@gmail.com, Department of Energy and Power Engineering, School of Mechanical and Power Engineering, Henan Polytechnic University, 2000 Century Avenue, Jiaozuo, Henan, 454000, P.R. China</p>
How can the European Ecodesign Directive guide the deployment of hydrogen-related products for mobility?
<p>Fuel cells and hydrogen products are expected to be increasingly deployed as European economies set course towards the energy transition. In order to actually contribute to the overall goal of sustainability, these products should be conceived as sustainable-by-design options and effective assessment tools are thus required to guide the design process. For the first time in the specific field of hydrogen-related products, this work tests and discusses the suitability of the instrument provided by the European Ecodesign Directive for such purposes: the EcoReport tool linked to the Methodology for Ecodesign of Energy-related Products. To that end, the propulsion systems of a fuel cell passenger car and a fuel cell heavy duty truck were assessed. First, two base cases defined according to current key performance indicators were implemented in the EcoReport tool to gain insights into ecodesign hotspots and gaps of the tool for its practical use to evaluate hydrogen-related products. Secondly, after adjusting the EcoReport tool according to the findings of the previous step, both cases were parametrised to estimate, under eco-efficiency and criticality aspects, up to which extent short-term technological targets could improve their performance. Overall, the EcoReport tool is concluded to be valuable for an early assessment and subsequent development of ecodesign measures for hydrogen-related products provided that it is upgraded in terms of direct data availability, updated criticality characterisation factors and impact assessment methods. By reaching the key performance indicators expected for 2030, the assessed products for mobility would arise as competitive road transport alternatives. Nevertheless, this performance is highly dependent on the production pathway of the hydrogen used as a fuel, which highlights the need for a holistic deployment of the hydrogen economy.</p>
Ion-specific water structures at a metal surface and its effect on the hydrogen production
<p>Here lies the tabulated data used to create the Figures for the Nature Communications manuscript NCOMMS-23-54843A titled "Ion-specific water structures at a metal surface and its effect on the hydrogen production".</p>
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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OpenNeuro
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