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15 results for “Hydrothermal Carbonization”
Underlying Data for Manuscript titled "Hydrothermal Carbonization (HTC) of Dairy Waste: Effect of Temperature and Initial Acidity on the composition and quality of solid and liquid products"
<p>The embodied files include the raw data and initial calculations used to generate the extended data for Manuscript titled "Hydrothermal Carbonization (HTC) of Dairy Waste: Effect of Temperature and Initial Acidity on the composition and quality of solid and liquid products". The files include calculations for Phosphorus Recovery from Hydrochar, as well as Heavy Metals Fractions retrieved by the hydrochar (solid product of Hydrothermal Carbonization).</p>
REFLOW Products from Hydrothermal Carbonization of Dairy Waste- Yield Calculations
<p>Dataset involving yield calculations for the hydrochar produced from the hydrothermal carbonization of dairy waste to produce STRUBIAS material. Calculations are performed based on the collected data from the laboratory experiments performed in the University of Limerick.</p>
Table 1 for Radiocarbon and Stable Carbon Isotope Constraints on the Propagation of Vent CO2 to Fluid in the Acidic Kueishantao Shallow Water Hydrothermal System
<p>This table contains radiocarbon (<sup>14</sup>C) and stable carbon isotope (<sup>13</sup>C) compositions of CO<sub>2</sub> in vent gas, dissolved inorganic carbon and particulates of hydrothermal fluid from Kueishantao shallow water hydrothermal system, offshore northeastern Taiwan.</p>
Optimization and scalability assessment of supercapacitor electrodes based on hydrothermally grown MoS2 on carbon cloth
<p>This dataset contains the measurement data for figures (graphs) published in journal article:</p> <p>Optimization and scalability assessment of supercapacitor electrodes based on hydrothermally grown MoS2 on carbon cloth </p> <p>by Jasna Mannayil, Olli Pitkänen, Minna Mannerkorpi, and Krisztian Kordas</p>
Carbon and hydrogen isotope fractionation during uncultured aerobic oxidation of short-chain alkanes that discharged from a natural hydrothermal system
<p>Aerobic oxidation of short-chain alkanes was observed in gas samples from the Lutao intertidal hydrothermal vents in Taiwan, during storage without adding strains and replenishing substrates at 20 <sup>o</sup>C up to 29 months. The carbon isotope fractionation factors (<em>ε<sub>C</sub></em>) of methane (C<sub>1</sub>), ethane (C<sub>2</sub>), and propane (C<sub>3</sub>), were calculated using the Rayleigh fractionation equation to be -37.1 ± 7.5‰, -14.8 ± 4.8‰, and -4.7 ± 5.2‰, respectively. The hydrogen isotope fractionation factor (<em>ε<sub>H</sub></em>) of methane was determined to be -281 ± 187‰. DNA sequencing of the 16sRNA gene in the vent fluids suggests that aerobic oxidation is dominated by methanotrophs of the genera <em>Methylomicrobium</em> and <em>Methylophaga,</em> which use the ribulose monophosphate pathway (RuMP). The degrees of isotope fractionation (<em>ε<sub>C</sub></em> and <em>ε<sub>H</sub></em> values) herein are larger than previously reported values, possibly due to the limited O<sub>2</sub> supply and low abundance of aerobic methane-oxidizing bacteria in the experiments. Since the fractionation factor of methane is higher than those of ethane and propane, the aerobic oxidation of thermogenic or microbial alkanes could produce carbon isotope reversal, which is frequently noted as a trait of abiotic hydrocarbons. This work demonstrates that in addition to anaerobic microbial oxidation, aerobic oxidation with a low cell density can also produce significant isotope fractionation of alkanes in geological closed/semi-closed environments that are characterized by moderate temperatures and a limited supply of substrates and O<sub>2</sub>; these environments include cold seeps, mud volcanoes, and low-temperature hydrothermal aquifers/reservoirs.</p>
Data from: Detection for nitrite based on fluorescent carbon dots by hydrothermal method with folic acid
A fluorescent carbon dots probe for detection of aqueous nitrite was fabricated by a one-pot hydrothermal method and the transmission electron microscope, X-ray diffractometer, UV-Vis absorption spectrometer and fluorescence spectrophotometer were used to study the property of carbon dots. The fluorescent property of carbon dots influenced by concentration of aqueous nitrite was studied. The interaction between the electron-donating functional groups and the electron-accepting nitrous acid could account for the quenching effect on carbon dots by adding aqueous nitrite. The products of the hydrolization of aqueous nitrite performed stronger quenching effect at lower pH. The relationship between the relative fluorescence intensity of carbon dots and the concentration of nitrite was described by the Stern-Volmer equation (I0/I-1=0.046[Q]) with a fine linearity (R2=0.99). The carbon dots-based probe provides a convenient method for the detection of nitrite concentration.
Underlying data / Hydrothermal carbonization as an alternative sanitation technology: process optimization and development of low-cost reactor
<p>Experimental data of a research publication "Hydrothermal carbonization as an alternative sanitation technology: process optimization and development of low-cost reactor" is provided.</p> <p><strong>Background:</strong> The provision of safe sanitation services is essential for human well-being and environmental integrity, but it is often lacking in less developed communities with insufficient financial and technical resources. Hydrothermal carbonization (HTC) has been suggested as an alternative sanitation technology, producing value-added products from faecal waste. We evaluated the HTC technology for raw human waste treatment in terms of resource recovery. In addition, we constructed and tested a low-cost HTC reactor for its technical feasibility.</p> <p><strong>Methods: </strong>Raw human faeces were hydrothermally treated in a mild severity range (≤ 200 °C and ≤ 1 hr). The total energy recovery was analysed from the energy input, higher heating value (HHV) of hydrochar and biomethane potential of process water. The nutrient contents were recovered through struvite precipitation employing process water and acid leachate from hydrochar ash. A bench-scale low-cost reactor (BLR) was developed using widely available materials and tested for human faeces treatment.</p> <p><strong>Results: </strong>The hydrochar had HHVs (23.2 - 25.2 MJ / kg) comparable to bituminous coal. The calorific value of hydrochar accounted for more than 90 % of the total energy recovery. Around 78 % of phosphorus in feedstock was retained in hydrochar ash, while 15 % was in process water. 72 % of the initial phosphorus can be recovered as struvite when deficient Mg and NH<sub>4</sub> are supplemented. The experiments with BLR showed stable operation for faecal waste treatment with an energy efficiency comparable to a commercial reactor system.</p> <p><strong>Conclusions: </strong> This research presents a proof of concept for the hydrothermal treatment of faecal waste as an alternative sanitation technology, by providing a quantitative evaluation of the resource recovery of energy and nutrients. The experiments with the BLR demonstrate the technical feasibility of the low-cost reactor and support its further development on a larger scale to reach practical implementation</p> <p> </p>
Extended Data for Manuscript titled "Hydrothermal Carbonization (HTC) of Dairy Waste: Effect of Temperature and Initial Acidity on the composition and quality of solid and liquid products"
<p>The document includes extended data for the manuscript titled "Hydrothermal Carbonization (HTC) of Dairy Waste: Effect of Temperature and Initial Acidity on the composition and quality of solid and liquid products". The data involved includes tables for the raw data of yield and recovery calculations, in addition to defining analysis methods for the solid and liquid products of the experimental reactions at the heart of the manuscript.</p>
Data from: Comparative studies on water- and vapor-based hydrothermal carbonization: process analysis
<p>Hydrothermal carbonization (HTC) reactor systems used to convert wet organic wastes into value-added hydrochar are generally classified in the literature as liquid water-based (HTC) or vapor-based (VTC). However, the distinction between the two is often ambiguous. In this paper, we theoretically developed models for predicting reactor pressure, volume fraction of liquid water, and water distribution between phases as a function of temperature.</p>
Hydrothermal carbonization of vegetable-tanned leather shavings (HTC-VTS) for environmental remediation: optimization of process conditions
<p><span>Herein, the response surface methodology (RSM) has been used to study simultaneously the effects of carbonization temperature, residence time, and moisture content on the activated hydrochar preparation-based vegetable-tanned leather shavings (VTS) using hydrothermal carbonization method (HTC). Owing to the desirability chosen, three responses were analysed, namely: the hydrochar yield, iodine, and methylene blue numbers. The analysis of experimental results revealed that the hydrochar yield was decreased with an increase in carbonization temperature which led to micropores formation inside the hydrochar network. The optimal preparation conditions retained were: 83.10%, 390.44 mg/g, and 259.63 mg/g for the hydrochar yield, iodine, and methylene blue number respectively. The hydrochar micrograph showed the presence of external pores, whereas the FTIR analysis recorded the presence of acidic functional groups found on hydrochar surface. The findings revealed that the VTS is a good precursor for the hydrochar preparation useful in the removal of organic and inorganic pollutants in aqueous media. </span></p>
Data from: Detection for nitrite based on fluorescent carbon dots by hydrothermal method with folic acid
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Data from: Comparative studies on water- and vapor-based hydrothermal carbonization: process analysis
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Hydrothermal carbonization of vegetable-tanned leather shavings (HTC-VTS) for environmental remediation: optimization of process conditions
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Co-expression analysis reveals distinct alliances around two carbon fixation pathways in hydrothermal vent symbionts
GEO Series GSE249345. Candidatus Endoriftia persephonae. 30 samples. Type: Expression profiling by high throughput sequencing.
Supporting information for Article "Hydrothermal carbonization for sludge disposal in Germany: A comparative assessment for industrial-scale scenarios in 2030"
<p>These supporting information files provides details of all case and scenario assumptions, scenario factors, sensitivity assumptions and factors as well as calculation results (PDF file) as well as the detailed backgound calculations (ZIP files with MS Excel Sheets) referred to in the article "Hydrothermal carbonization for sludge disposal in Germany: A comparative assessment for industrial-scale scenarios in 2030" (Journal of Industrial Ecology).</p>
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