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K、Mn助剂协同效应对Fe基催化剂上CO加氢制低碳烯烃反应性能的影响

陈嘉宁 ,  刘永梅

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引用本文: 陈嘉宁, 刘永梅. K、Mn助剂协同效应对Fe基催化剂上CO加氢制低碳烯烃反应性能的影响[J]. 燃料化学学报, 2013, 41(12): 1488-1494. shu
Citation:  CHEN Jia-ning, LIU Yong-mei. Effects of Mn-K synergistic action on iron-based catalyst for CO hydrogenation to light olefins[J]. Journal of Fuel Chemistry and Technology, 2013, 41(12): 1488-1494. shu

K、Mn助剂协同效应对Fe基催化剂上CO加氢制低碳烯烃反应性能的影响

    通讯作者: 刘永梅（1973- ），女，山西太原人，博士，副教授，主要从事分子筛合成及应用，E-mail：l_y_m@126.com。
  • 基金项目:

    国家自然科学基金（21076222）。 

摘要: 采用典型方法制备了不同Fe、Mn、K比例的铁基催化剂，利用X射线粉末衍射、N2吸附/脱附、扫描电镜、拉曼光谱、H2-TPR等手段对催化剂进行了表征，并考察了催化剂对CO加氢制低碳烯烃反应的催化性能。结果表明，Mn能有效促进活性相分散，抑制碳链增长，但Fe-Mn强相互作用不能有效增加低碳烃烯/烷比，α-Fe2O3作为活性铁物种前驱体对烯烃生成反应更加有利。K通过减少Mn以氧化物形式出现，增加FeMn化合物晶格缺陷，从而最终使Fe-Mn-K催化剂低碳烯烃收率显著高于Fe-Mn和Fe-K体系。

English

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  • 收稿日期:  2013-07-15
  • 网络出版日期:  2013-10-12
通讯作者: 陈斌, bchen63@163.com
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