Effect of Structural and Lattice Oxygen Changes on the Properties of CuO/CeO2 Catalysts for High-Temperature Water-Gas shift of H2-rich Coal-Derived Synthesis Gas
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Abstract
A series of CeO2-based Cu catalysts was synthesized by the co-precipitation method. BET, N2O decomposition, XRD, TEM, EDS, Raman spectroscopy, H2-TPR, and XPS were used to characterize the catalysts. The catalytic activity was tested in terms of CO conversion and H2 selectivity in a H2-rich coal-derived synthesis gas. The effects of the copper content and the calcination temperature on the catalytic activity were investigated. A strong surface structure-activity relationship in the water-gas shift (WGS) reaction was observed for all the catalyst samples. With increasing CuO loading, the portion of finely dispersed CuO nanoparticles decreased. By contrast, increasing calcination temperature reduced the BET surface area and reducibility, as induced by CuO agglomeration, resulting in a negative effect on H2 production. The distinctive dependence of the WGS activity on the surface lattice oxygen and active oxygen vacancy of the examined solids was observed and investigated for all the CuO/CeO2 catalysts.
© by Oldenbourg Wissenschaftsverlag, München, Germany
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Articles in the same Issue
- Synthesis of Small Carbon Nanoparticles in a Microwave Plasma Flow Reactor
- Effect of Structural and Lattice Oxygen Changes on the Properties of CuO/CeO2 Catalysts for High-Temperature Water-Gas shift of H2-rich Coal-Derived Synthesis Gas
- The Effect of Heat Treatments and Degradation Behavior of High-Rate Dischargeability in Ti-V-based Alloys as Anode Materials for Nickel-Metal-Hydride Batteries
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- Investigation of Cellulose and Tin Oxide Hybrid Composite as a Disposable pH Sensor
- Surface Dilational Properties of Sodium 4-(1-methyl)-Alkyl Benzene Sulfonates: Effect of Alkyl Chain Length
- Interaction between Zwitterionic Surfactants and Amphiphilic Drug: A Tensiometric Study
- Effect of Temperature on the Supramolecular Behavior of Antidepressant Drug Amitriptyline Hydrochloride in the Presence of Nonionic Surfactants (Tweens and Brijs) as Pharmaceutical Excipients
- Tautomerism of Neutral α-Tropolone and its Protonated and Deprotonated Forms
