文献类型：期刊文献

英文题名：Preparation of MnCo/MCM-41 catalysts with high performance for chlorobenzene combustion

作者：Cheng, Zhen[1];Li, Jingrong[1];Yang, Peng[1];Zuo, Shufeng[1]

机构：[1]Shaoxing Univ, Zhejiang Key Lab Alternat Technol Fine Chem Proc, Shaoxing 312000, Zhejiang, Peoples R China

年份：2018

卷号：39

期号：4

起止页码：849

外文期刊名：CHINESE JOURNAL OF CATALYSIS

收录：SCI-EXPANDED(收录号：WOS:000430989300031)、、EI(收录号：20181705054345)、WOS

基金：This work was supported by the National Natural Science Foundation of China (21577094).

语种：英文

外文关键词：MCM-41; Mn/Co; Catalytic combustion; Chlorobenzene; Characterization

外文摘要：MCM-4 I was synthesized by a soft template technique. The specific surface area and pore volume of the MCM-41 were 805.9 m(2)/g and 0.795 cm(3)/g, respectively. MCM-41-supported manganese and cobalt oxide catalysts were prepared by an impregnation method. The energy dispersive X-ray spectroscopy clearly confirmed the existence of Mn, Co, and O, which indicated the successful loading of the active components on the surface of MCM-41. The structure and function of the catalysts were changed by modulating the molar ratio of manganese to cobalt. The 10%MriCo(6:1)/MCM-41 (Mn/Co molar ratio is 6:1) catalyst displayed the best catalytic activity according to the activity evaluation experiments, and chlorobenzene (1000 ppm) was totally decomposed at 270 degrees C. The high activity correlated with a high dispersion of the oxides and was attributed to the exposure of more active sites, which was demonstrated by X-ray diffraction and high-resolution transmission electron microscopy. The strong interactions between MnO2, Co3O4, MnCoOx , and MCM-41 indicated that cobalt promoted the redox cycles of the manganese system. The bimetal-oxide-based catalyst showed better catalytic activity than that of the single metal oxide catalysts, which was further confirmed by H-2 temperature-programmed reduction. Chlorobenzene temperature-programmed desorption results showed that 10%MnCo(6:1)/MCM-41 had higher adsorption strength for chlorobenzene than that of single metal catalysts. And stronger adsorption was beneficial for combustion of chlorobenzene. Furthermore, 10%MnCo(6:1)/MCM-41 was not deactivated during a continuous reaction for 1000 h at 260 degrees C and displayed good resistance to water and benzene, which indicated that the catalyst could be used in a wide range of applications. (C) 2018, Dalian Institute of Chemical Physics, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.