文献类型：期刊文献

英文题名：Promoting oxidative activity and stability of CeO2 addition on the MnOx modified kaolin-based catalysts for catalytic combustion of benzene

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

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

年份：2017

卷号：162

起止页码：218

外文期刊名：CHEMICAL ENGINEERING SCIENCE

收录：SCI-EXPANDED(收录号：WOS:000397832600020)、、WOS

基金：We gratefully acknowledge the financial support provided by the National Natural Science Foundation of China (No. 21577094).

语种：英文

外文关键词：Kaolin; Rare earth; Transition metal; Benzene; Catalytic combustion

外文摘要：In this paper, a new kaolin-based Nay-type zeolite crystal (KL-NY) material was synthesized through in situ crystallization, and Ce-2-modified KL-NY-supported manganese oxide catalysts (MnCeOx/KL-NY) were further prepared and investigated for benzene combustion. The texture-structure, surface morphology, dispersion of active components and the redox properties of the materials were systematically characterized and analyzed by the techniques of N-2 adsorption-desorption, high resolution transmission electron microscopy (HRTEM)-energy dispersive spectroscopy (EDS) as well as the H-2 temperature programmed reduction (H-2-TPR). The results showed that the calcinated and crystallized KL-NY support exhibited good thermal stability with large specific surface area and large pore volume. The MnCe/KL-NY catalysts exhibited excellent deep oxidation properties. Among them, 10%MnCe(9:1)/KL-NY displayed the highest catalytic activity and could completely oxidize low-concentration benzene at 260 degrees C; its activity did not decrease after continuous reaction for 800 h, indicating its high potential for industrial application. The improved catalytic properties of the MnCe/KL-NY catalysts were mainly related to the higher oxidation state of MnOx and the preferable redox properties, resulted from the highly dispersion of CeO2 and MnOx on the surface of KL-NY as well as their strong interaction. (C) 2017 Elsevier Ltd. All rights reserved.