六铝酸镧LaNiAl_(11)O_(19)上CH_4的活化及CO_2重整反应机理研究  

Activation of CH_4 and the Mechanistic Investigation with CO_2 Reforming over Hexaaluminate LaNiAl^(11)O)_(19)

作　　者：徐占林[1] 

机构地区：[1]吉林师范大学化学学院,吉林四平136000

出　　处：《吉林师范大学学报（自然科学版）》2003年第1期20-23,共4页Journal of Jilin Normal University:Natural Science Edition

基　　金：国家自然科学基金项目 (1 9973 0 1 2 )

摘　　要：本文通过脉冲反应,在还原态六铝酸镧LaNiAl11O19催化剂表面,考察了CH4和CO2的活化及CO2重整过程,提出了甲烷CO2重整制合成气的反应机理.研究表明,在还原态六铝酸镧LaNiAl11O19催化剂上,Ni0是CH4和CO2活化解离的活性中心.在CO2重整过程中,六铝酸镧LaNiAl11O19对甲烷裂解积炭和二氧化碳消炭反应都有很高的催化活性,二氧化碳的消炭作用促进了甲烷的活化裂解,同时甲烷裂解积炭提高了二氧化碳消炭及活化解离生成CO,两个反应相互促进.In the paper,the activation and dissociation of CH4 and CO2,as well as the reforming reaction between CH4 and CO2,were investigated over the reduced hexaaluminate LaNiAl11O19 catalyst by pulse reaction,and the reaction mechanism of CO2 reforming of methane to syngas was produced.Investigation showed that Ni0 was the active center of activation and dissociation of CH4 and CO2 on the reduced hexaaluminate LaNiAl11O19 catalyst.Hexaaluminate LaNiAl11O19 exhibited rather high catalytic activity on both deposition carbon of CH4 decomposition and CO2 eliminating carbon during CO2 reforming of methane to syngas.CO2 eliminating carbon promoted CH4 decomposition,and in the meantime,deposition carbon of CH4 decomposition increased the activity of CO2 eliminating carbon to produce CO,the both reactions accelerated each other.

关 键 词：六铝酸镧 LaNiAl11O19 CH4 反应机理 甲烷 二氧化碳重整反应 催化剂 合成气 活化解离 

分 类 号：TE665.3[石油与天然气工程—油气加工工程]