Defect confinement in CuO/HZSM-5-T catalysts: A novel approach for enhancing stability in AsH3 catalytic oxidation

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NETL
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Elsevier

外文摘要：© 2024The accumulation of arsenic-containing oxides is a critical factor in the reduced activity of catalysts for arsine (AsH3) removal. In this study, we successfully synthesized a hollow-structured molecular sieve support (HZ-T) for CuO loading (12CuO/HZ-T), significantly enhancing AsH3 catalytic oxidation efficiency and stability. The optimized catalyst (12CuO/HZ-T0.7-150-72) exhibited substantially higher AsH3 catalytic activity than the conventional catalyst (12CuO/HZ) at 100 and 140 °C, maintaining 100 % AsH3 removal for over 167 h at 140 °C. Systematic characterization revealed that the superior AsH3 catalytic performance of 12CuO/HZ-T0.7-150-72 is attributed to the confinement of active components within the support's cavities, addressing the rapid deactivation caused by arsenic-containing oxide coverage. Additionally, basic sites introduced by tetrapropylammonium hydroxide (TPAOH) treatment further promoted AsH3 removal efficiency.

外文关键词：

Arsine (AsH3)Catalytic oxidationCuOHollow structureHZSM-5TPAOH

作者：

Yang X.、Zeng Z.、Li Z.、Zhang Y.、Mao W.、Wang Z.、Sun X.、Li K.、Wang F.、Ning P.

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作者单位：

Faculty of Environmental Science and Engineering Kunming University of Science and Technology

Faculty of Environmental Science and Engineering Kunming University of Science and Technology||National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries

Faculty of Environmental Science and Engineering Kunming University of Science and TechnologyFaculty of Environmental Science and Engineering Kunming University of Science and Technology||National-Regional Engineering Center for Recovery of Waste Gases from Metallurgical and Chemical Industries||

出版年：

2025

DOI：

10.1016/j.fuel.2024.133367

Fuel: A journal of fuel science

ISSN：0016-2361

年,卷(期)：2025.381(Pt.1)

参考文献量66