Enhancement of the Hydrothermal Stability of WO3/Ce0.68Zr0.32O2 Catalyst by Silica Modification for NH3-SCR
Source abstract
Abstract
Hydrothermal stability of catalysts for selective catalytic reduction of NOx with NH3 (NH3-SCR) is essential to develop a promising candidate catalyst for removing NOx emitted from diesel engines. The hydrothermal stability of WO3/Ce0.68Zr0.32O2 catalyst has been significantly improved by introducing SiO2 into Ce0.68Zr0.32O2 during the process of hydrothermal treatment in the condition of 10 vol % water vapor at 800 °C for 10 h. The results of XRD, Raman, N2 physisorption, TEM, XPS, and H2-TPR characterizations demonstrate that SiO2 could effectively inhibit the formation of Ce2(WO4)3 and the sintering of the catalyst during the hydrothermal aging, correspondingly; the surface acidity and redox properties of the SiO2-containing catalyst are maintained after hydrothermal aging. Consequently, SiO2-modified catalyst displays better hydrothermal stability than WO3/Ce0.68Zr0.32O2 after the same hydrothermal treatment.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: Catalytic Processes in Materials Science · Catalysis and Oxidation Reactions · Catalysis and Hydrodesulfurization Studies
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of New Energy and Low-Carbon Technology, Sichuan University, Chengdu 610207, People’s Republic of China
State Key Laboratory of Polymer Materials Engeineering, Polymer Research Institute, Sichuan University, Chengdu 610207, People’s Republic of China
College of Chemistry, Sichuan University, Chengdu 610064, People’s Republic of China
Sinocat Environmental Technology Company, Ltd., Chengdu 611731, People’s Republic of China
Funding
Ministry of Science and Technology of the People's Republic of China · National Natural Science Foundation of China · Sichuan Science and Technology Program · National Engineering Laboratory for Mobile Source Emission Control Technology
References (51)
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