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Citation: LIU Li-cheng, LI Hui-quan, CAI Wei-quan, ZHANG Yi. Synthesis, Characterization and Catalytic Activity of Mesoporous Cr-MSU-1[J]. Acta Physico-Chimica Sinica, ;2005, 21(11): 1311-1314. doi: 10.3866/PKU.WHXB20051124 shu

Synthesis, Characterization and Catalytic Activity of Mesoporous Cr-MSU-1

1.
The Key Laboratory of Green Process and Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100080; Graduate School of the Chinese Academy of Sciences, Beijing 100049

Received Date: 17 March 2005
Available Online: 15 November 2005

Mesoporous Cr-MSU-1 was successfully prepared by using sodium silicate, chromium nitrate, fatty alcohol polyoxyethylene ether (A(EO)9) as the source of silicone, metal and mesostructure-directing agent, respectively. Cr-MSU-1 and MSU-1 were comparatively characterized by XRD, HRTEM, N2 adsorption-desorption, FT-IR and DR UV-Vis techniques. No obvious differences on structural and textural properties between them were observed from XRD patterns and N2 adsorption-desorption isotherms. The HRTEM image confirmed that Cr-MSU-1 took on wormlike mesostructure that was similar to MSU-1. In the FT-IR patterns, the introduction of Cr showed slight influence to adsorption bands of MSU-1, which indicated that Cr was incorporated into the framework of MSU-1. It is suggested from the DR UV-Vis spectra that Cr species mostly formed Cr(VI) in tetrahedral coordination in Cr-MSU-1. The Cr-MSU-1 catalyst performs well in the dehydrogenation of ethane with CO2, resulting in the production of ethylene with a conversion of 31.7% and a selectivity of 96.1% at 650 ℃.
- Mesoporous materials;Cr-MSU-1;Oxidative dehydrogenation;Ethane; Carbon dioxide
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