In situ DRIFT spectroscopy study into the reaction mechanism of toluene over CeMo catalysts

被引：18

作者：

Zhang, Xuejun ^{[1
]}

Li, Haiyang ^{[1
]}

Song, Zhongxian ^{[2
]}

Liu, Wei ^{[1
]}

Liu, Zepeng ^{[1
]}

Mo, Dujuan ^{[1
]}

Gao, Hongrun ^{[1
]}

Zhang, Mengru ^{[1
]}

机构：

[1] Shenyang Univ Chem Technol, Coll Environm & Safety Engn, Shenyang 110142, Peoples R China

[2] Henan Univ Urban Construct, Fac Environm & Municipal Engn, Henan Key Lab Water Pollut Control & Rehabil Techn, Key Lab Carbon Emiss Reduct & Combined Air Pollut, Pingdingshan 467036, Peoples R China

来源：

JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2022年 / 10卷 / 06期

基金：

中国国家自然科学基金;

关键词：

Catalytic oxidation; Preparation method; In-situ DRIFTS; CeMo catalysts; SURFACE-STRUCTURE; DOPED CEO2; PERFORMANCE; COMBUSTION; CO; DEGRADATION; KINETICS; REMOVAL; NO; FE;

D O I：

10.1016/j.jece.2022.108895

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The CeMo catalysts were prepared via different method and employed for the catalytic combustion of toluene. The influence of different preparation methods on CeMo samples for toluene oxidation was revealed. The toluene catalytic oxidation efficiency followed an order of CeMo-HT > CeMo-CP > CeMo-Sg. The long-term test indicated that the CeMo-HT possessed outstanding thermal stability. The excellent catalytic activity of CeMo-HT could be reasonably attributed to the smallest grain size, the highest number of low valence Ce3+ ions and Osur species. CeMo-HT catalyst prepared by the hydrothermal method possessed the richer oxygen vacancies, which promoted the deep oxidation of toluene, and effectively reduced the production of intermediates. However, CeMo-HT (aged) possessed poorer oxygen vacancies, and generated more by-products. Additionally, the two reaction pathways of the toluene were inferred. In pathway I for CeMo-HT (aged): toluene -> benzyl alcohol -> benzal-dehyde -> benzoic acid -> carbonate -> CO2 and H2O. In pathway II for CeMo-HT: toluene -> phenol -> benzo-quinone -> maleic anhydride -> CO2 and H2O.

引用

页数：12

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