Oxidation of acetone over Co-based catalysts derived from hierarchical layer hydrotalcite: Influence of Co/Al molar ratios and calcination temperatures

被引：49

作者：

Zhao, Qian ^{[1
,2
]}

Ge, Yunli ^{[1
,2
]}

Fu, Kaixuan ^{[1
,2
]}

Ji, Na ^{[1
,2
]}

Song, Chunfeng ^{[1
]}

Liu, Qingling ^{[1
,2
]}

机构：

[1] Tianjin Univ, Sch Environm Sci & Technol, Tianjin Key Lab Indoor Air Environm Qual Control, Tianjin 300350, Peoples R China

[2] Tianjin Univ, State Key Lab Engines, Tianjin 300072, Peoples R China

来源：

CHEMOSPHERE | 2018年 / 204卷

基金：

美国国家科学基金会;

关键词：

Hydrotalcite derived oxides; Acetone; Catalytic oxidation; Surface Co3+/Co2+ molar ratio; Low temperature reduction; DOUBLE HYDROXIDES; PRECURSORS; TOLUENE; OXIDES; DECOMPOSITION; REDUCTION; COMPOUND; STORAGE; NI;

D O I：

10.1016/j.chemosphere.2018.03.198

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In order to enhance catalytic performance for acetone, Co-based catalysts prepared under different Co/Al molar ratios and calcination temperatures have been studied in this work. The results indicated that the catalytic activities of the catalysts firstly increased and then decreased with the increase of the Co/Al molar ratio and decreased with the increase of the calcination temperature. Based on the catalytic activities, TG/DTA, XRD, TPR and XPS characterization results, it can be found that catalytic activities of the catalysts with various Co/Al molar ratios were effected by the good crystallization structure of catalyst precursor, surface Co3+/Co2+ molar ratio, low temperature reducibility, and O-ads/O-latt molar ratio of the catalysts. Meanwhile, the catalytic activities of the catalysts with different calcination temperatures depended on the low temperature reducibility, surface Co3+/Co2+ molar ratio, porous structure and crystallization structure of the catalyst. Among different synthetic composition, 5:1 CoAlO-300 catalyst (T-90% = 225 degrees C) and 5:1 CoAlO-200 catalyst (T-90% = 222 degrees C) exhibited the efficient acetone oxidation. (C) 2018 Elsevier Ltd. All rights reserved.

引用

页码：257 / 266

页数：10

共 38 条

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