摘要
采用过渡应答法研究了J105 Ni催化剂上CO的吸附行为以及CO歧化反应与甲烷化反应。实验结果表明,在J105上甲烷化反应机理为直接解离机理,其中CO解离为反应的控制步骤,由此提出了J105 Ni催化剂上可能遵循的甲烷化反应机理。
The adsorption and desorption behavior of CO and the mechanism of its disproportionation and methanation on J105 Ni catalyst were studied by the transient response method. It was found that at reaction temperature, there are reversible and irreversible CO adsorption on Ni catalyst, with the latter predominating over the fromer. When the reaction temperature is above 150℃, CO_2 is observed, which increaces with increasing of temperature. CO dissociates into surface oxygen and surface carbon which have high reactivity for the formation of methane. The methanation of carbon monoxide on J105 Ni follows a direct dissociation mechnism, in which the dissociation of carbon monoxide was. the nate determining step. A scheme of the mechanism was proposed.
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
1992年第2期194-199,共6页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金
关键词
催化剂
镍
甲烷化反应
methanation reaction
transient response
Ni catalyst
