Methane dehydroaromatization over Mo-modified H-MFI for gas to liquid catalysts

作     者：Hirofumi Aritani Hiromi Shibasaki Hitoshi Orihara Atsushi Nakahira 

作者机构：Department of Applied ChemistrySaitama Institute of Technology Graduate School of EngineeringOsaka Prefecture University 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2009年第21卷第6期

页      面：736-740页

核心收录：

学科分类：08[工学] 0817[工学-化学工程与技术] 081701[工学-化学工程] 

基　　金：supported by the Joint Studies Program (No. 18-502, and 19-501) of UVSOR-IMS, Japan supported by the Joint Studies Program (No. 2000G274, 2004G110)of KEK-PF, Japan 

主　　题：direct gas to liquid methane dehydroaromatization Mo/H-MFI L-XANES K-XAFS 

摘      要：For direct gas to liquid（GTL）,a novel process producing energy sources for methane dehydroaromatization is *** MoO3 on H-MFI zeolite shows the high catalytic capacity and a selective activity for dehydroaromatization of methane to benzene at 973 K in a fixed bed *** the other hand,deactivation by coke on the active sites in all the catalysts is formed during the reaction.H2 co-feed suppressed the deactivation,which is probably due to the decrease in coking *** K-edge X-ray absorption fine structure（XAFS） results showed the formation of dispersed Mo2C species with low crystallinity after *** LIII-edge XANES（X-ray absorption near-edge structure） indicated the formation of active Mo species including Mo2C and Mo-oxycarbide（MoOxCy）,where the redox state should be independent in the absence/presence of *** is concluded that Mo-oxycarbide species act as highly active species,and their stability affected the durable activity in the presence of H2.