CTAB作模板剂制备CH_4/CO_2重整催化剂Ce-Zr-Co-O_x及其催化性能研究  

Preparation of Ce-Zr-Co-O_x composite oxides by using CTAB as template and their catalytic behaviors for carbon dioxide reforming of methane

作　　者：王莉[1,2] 王诗瀚[1] 苏占军[1] 官玲丽[1] 敖先权[1] 

机构地区：[1]贵州大学化学与化工学院,贵州贵阳550025 [2]国家复合改性聚合物材料工程技术研究中心,贵州贵阳550014

出　　处：《天然气化工—C1化学与化工》2013年第5期42-46,共5页Natural Gas Chemical Industry

基　　金：贵州省自然科学基金项目(黔科合J字[2009]2239号);贵州大学引进人才基金项目(贵大人基合字[2008]022号);贵州省科技厅工业攻关项目(黔科合GY字[2011]3047);贵州大学研究生创新基金(理工2012003)

摘　　要：以十六烷基三甲基溴化铵(CTAB)为模板剂,用共沉淀-水热法制备了CH4/CO2重整制取合成气催化剂Ce-Zr-Co-O x复合氧化物,并用XRD、SEM和H2-TPR对其进行了表征,同时考察了Ce、Zr、Co元素含量,催化反应温度,CTAB添加量以及空速对反应的影响。结果表明,增加Co含量可提高Ce-Zr-Co-O x的催化活性,当n(Ce)∶n(Zr)∶n(Co)为3∶3∶5时,其催化活性较好,但容易烧结,而在制备过程中适当添加CTAB模板剂可改善催化剂的抗烧结性能,提高其稳定性,当n(CTAB)/n(Ce+Zr+Co)为1时,催化剂活性及稳定性较好。Ce-Zr-Co-Ox composite oxide catalysts were prepared by the co-precipitation-hydrothermal method using cetyltrimethy- lammonium bromide （CTAB） as the template and characterized by XRD, SEM and H2-TPR. The effects of the addition of CTAB, the contents of Ce, Zr and Co elements, reaction temperature and space velocity on the carbon dioxide reforming of methane to syngas over the catalysts were investigated. The results showed that the catalytic activity would increase with the increase of the Co content in the catalysts; the catalyst with the Ce/Zr/Co mole ratio of 3/3/5 showed the highest activity but was easily sintered; the addition of CTAB in the process of catalyst preparation could improve the sintering resistance of the catalysts; and the catalyst prepared using the CTAB/（Ce＋Zr＋Co） mole ratio of 1 exhibited optimum catalytic activity and stability.

关 键 词：甲烷二氧化碳重整 催化剂制备 合成气 CTAB 模板剂 

分 类 号：O643.36[理学—物理化学] TQ426[理学—化学]