摘要
采用共浸渍法制备了不同Fe含量的FeMn/MgO催化剂,以CO加氢合成低碳烯烃为模型反应对催化剂的反应性能进行了考察,并借助X射线物相分析、N2物理吸附、程序升温还原等测试手段对催化剂进行了表征。结果表明,随着Fe含量增加,CO加氢反应活性和C2=-C4=选择性均呈现先增加后减小的趋势;当w(Fe)为9%时,CO转化率达到91.36%,C2=～C4=选择性为58.48%。催化剂的比表面积对反应活性有重要影响。随着Fe含量增加,FeMn间相互作用增强,形成了难于还原的FeMn固溶体。
The effect of iron content on Fe-Mn/MgO catalysts for light alkenes synsthesis by CO hydrogenation was investigated and characterized by BET,XRD and H2-TPR techniques. The catalysts were prepared by conventional co-impregnation method. The highest activity was obtained over the catalyst with 9 wt% iron, over which CO conversion and the selectivity of C2^= -C4 ^= reached 91.36% and 58.48%, respectively. The reaction activity and the selectivity of C2^= -C4 ^= were improved in a certain increase range of iron content, and then decreased. The results showed that the catalyst surface area played an important role in the catalytic activity. With the increase of Fe loading, the interaction of Fe and Mn was strengthened and FeMn solid solution was formed.
出处
《天然气化工—C1化学与化工》
CAS
CSCD
北大核心
2007年第6期17-20,共4页
Natural Gas Chemical Industry
基金
国家自然科学基金重大专题项目(205903603)
国家教育部新世纪优秀人才资助项目(NCET-05-0783)资助
