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5 results for “Sulfur resistance”
Data from: Sulfur resistance of Ce-Mn/TiO2 catalysts for low-temperature NH3–SCR
Ce-Mn/TiO2 catalyst prepared using a simple impregnation method demonstrated a better low-temperature selective catalytic reduction of NO with NH3 (NH3-SCR) activity in comparison with the sol-gel method. The Ce-Mn/TiO2 catalyst loading with 20% Ce had the best low-temperature activity and achieved a NO conversion rate higher than 90% at 140-260°C with a 99.7% NO conversion rate at 180 °C. The Ce-Mn/TiO2 catalyst only had a 6% NO conversion rate decrease after 100 ppm of SO2 was added to the stream. When the SO2 was removed from the stream, the catalyst was able to recover completely. The crystal structure, morphology, textural properties, and valence state of the metals involving the novel catalysts were investigated using X-ray diffraction (XRD), N2 adsorption and desorption analysis, X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), and energy dispersive spectroscopy (EDS), respectively. The decrease of NH3-SCR performance in the presence of 100 ppm SO2 was due to the decrease of the surface area, change of the pore structure, the decrease of Ce4+ and Mn4+ concentration, and the formation of the sulfur phase chemicals which blocked the active sites and changed the valence status of the elements.
CORROSION RESISTANCE OF RENOVATED SULFUR CONCRETE
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Supporting data for "Simultaneous monitoring of crystalline active materials and resistance evolution in lithium-sulfur batteries"
<p>This is the dataset of electrochemical and operando X-ray diffracytion experiments for our publication "Simultaneous monitoring of crystalline active materials and resistance evolution in lithium-sulfur batteries". This archive contains the raw data and scripts written in R used in the analysis and presentation of the results in this manuscript.</p> <p><strong>Abstract for the manuscript:</strong></p> <p>Operando X-ray diffraction (XRD) is a valuable tool for studying secondary battery materials as it allows for the direct correlation of electrochemical behavior with structural changes of crystalline active materials. This is especially true for the lithium-sulfur chemistry, in which energy storage capability depends on the complex growth and dissolution kinetics of lithium sulfide (Li<sub>2</sub>S) and sulfur (S<sub>8</sub>) during discharge and charge, respectively. In this work, we present a novel development of this method through combining operando XRD with simultaneous and continuous resistance measurement using an Intermittent Current Interruption (ICI) method. We show that a coefficient of diffusion resistance, which reflects the transport properties in the sulfur/carbon composite electrode, can be determined from analysis of each current interruption. Its relationship to the established Warburg impedance model is validated theoretically and experimentally. We also demonstrate for an optimized electrode formulation and cell construction that the diffusion resistance increases sharply at the discharge end point, which is consistent with the blocking of pores in the carbon host matrix. The combination of XRD with ICI allows for a direct correlation of structural changes with not only electrochemical properties but also energy loss processes at a non-equilibrium state, and therefore is potentially highly valuable for the study of many other energy storage chemistries.</p>
Data from: Sulfur resistance of Ce-Mn/TiO2 catalysts for low-temperature NH3–SCR
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Transcriptomic analysis of sulfur dioxide stress-resistant Saccharomyces cerevisiae strain obtained by evolutionary engineering
GEO Series GSE292349. Saccharomyces cerevisiae. 6 samples. Type: Expression profiling by array.
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