| 光谱学与光谱分析 |
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| Preparation of Cr-MnOx/Cordierite and Their Properties for Catalytic Oxidation of 1,2-Dichlorobenzene |
| ZHANG Wen-rui1, TANG Ai-dong2, XUE Jian-liang1 |
1. College of Chemical and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China
2. School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China |
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Abstract Cr-MnOx/cordierite composites were prepared by Sol-gel, Impregnation, Co-precipitation and Rheological phase reaction method. Various technologies including X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectrometer (EDS), thermogravimetry/differential scanning calorimetry (TG/DCS), and temperature-programmed reduction (TPR) were used to characterize the structure and morphology properties of the synthesized composites. The catalytic ability test of 1,2-dichlorobenzene (o-DCB) over the catalysts was conducted in a fixed-bed flow reactor with a gas hourly space velocity (GHSV) of 30,000 h-1 to investigate the catalytic performance of the prepared composites. The results indicated that the combined Cr2O3 and Mn2O3 phases supported on cordierite possessed a special ball-shaped and better redox property in the catalyst prepared by the Co-precipitation method with a Cr/Mn atomic ratio of 2∶5, which was conducive to the increase of the synergistic effect and subsequently enhancement of the catalytic performance. Furthermore, it exhibited better stability within 60 h, which indicates a good prospect for industrial applications.
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Received: 2015-09-23
Accepted: 2016-01-20
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Corresponding Authors:
ZHANG Wen-rui
E-mail: wenrui.mao@163.com
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