Ti-Si composite oxide-supported cobalt catalysts for CO_2 hydrogenation

作     者：Jakrapan Janlamool Piyasan Praserthdam Bunjerd Jongsomjit 

作者机构：Center of Excellence on Catalysis and Catalytic Reaction Engineering Department of Chemical Engineering Faculty of Engineering Chulalongkorn University 

出 版 物：《Journal of Natural Gas Chemistry》 (天然气化学杂志（英文版）)

年 卷 期：2011年第20卷第5期

页      面：558-564页

核心收录：

学科分类：081705[工学-工业催化] 08[工学] 0817[工学-化学工程与技术] 

基　　金：supported by the Thailand Research Fund(TRF)and Office of the Higher Education Commission(CHE) the National Research Council of Thailand(NRCT) NRU-CU(AM1088A) 

主　　题：CO2 hydrogenation titania-silica cobalt catalysts methanation 

摘      要：In the present work, different silica-based supported cobalt （Co） catalysts were synthesized and used for CO2 hydrogenation for methanation. Different supports, such as SSP, MCM-41, TiSSP and TiMCM were used to prepare Co catalysts with 20 wt% Co loading. The supports and catalysts were characterized by means of N2 physisorption, XRD, SEM/EDX, XPS, TPR and CO chemisorption. It is found that after calcination of catalysts, Ti is present in the form of anatase. The introduction of Ti plays important roles in the properties of Co catalysts by：（i） facilitating the reduction of Co oxides species which are strongly interacted with support, （ii） preventing the formation of silicate compounds, and （iii） inhibiting the RWGS reaction. Based on CO2 hydrogenation, the CoTiMCM catalyst exhibites the highest activity and stability.