Synergistic effect of Pt nanoparticles and micro-mesoporous ZSM-5 in VOCs low-temperature removal

被引：39

作者：

Wang, Jialu ^{[1
]}

Guo, Xiaolin ^{[2
]}

Shi, Yijun ^{[1
]}

Zhou, Renxian ^{[1
]}

机构：

[1] Zhejiang Univ, Inst Catalysis, Hangzhou 310028, Peoples R China

[2] China Jiliang Univ, Coll Mat & Chem, Hangzhou 310018, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL SCIENCES | 2021年 / 107卷

关键词：

Pt/ZSM-5; catalysts; Micro-mesoporous ZSM-5; VOC oxidation; Synergistic effect; H-TYPE ZEOLITES; CATALYTIC-OXIDATION; COMBUSTION; HZSM-5; DESILICATION; PERFORMANCE; REDUCTION; EFFICIENT; CRYSTALS; METHANOL;

D O I：

10.1016/j.jes.2021.01.033

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Micro-mesoporous ZSM-5 zeolites were obtained by the post-treatment of tetrahydroxy ammonium hydroxide (TPAOH) solution with different concentration. The hierarchical pore structure formed during the desilication process facilitates the dispersion of Pt nanoparticles and Pt/ZSM-5 catalysts exhibit rather high catalytic activity for the deep oxidation of various VOCs at low temperature. The catalyst treated with TPAOH of 0.1 mol/L (Pt/ZSM-5(0.1)) shows the lowest degradation temperature (T-90%) of 128 and 142 degrees C, respectively for benzene and n-hexane. Compared with the untreated Pt/ZSM-5 catalyst, the abundant mesopores, small Pt particle size and finely dispersed Pt contribute to the superior catalytic activity and stability of the Pt/ZSM-5 catalysts for VOCs removal. More importantly, the existence of H2O in the feed gases hardly affected the activity of Pt/ZSM-5(0.1) catalyst at the low reaction temperature of 128 degrees C, which is very important for VOCs low-temperature removal in the future practical applications. (c) 2021 The Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences. Published by Elsevier B.V.

引用

页码：87 / 97

页数：11

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