摘要
Fe基催化剂具有成本低、易得、操作温度范围宽等诸多优点而备受关注。然而,物相复杂、活性相不确定、反应性能有待提升等诸多缺点也是Fe基催化剂现今存在的主要问题。综述了Fe基催化剂对合成气一步法制备低碳烯烃反应(FTO)的研究进展,总结了活化过程、辨析了活性相对FTO反应性能的影响。指出活化过程与气氛直接相关,且整体呈现由表相向体相递进反应的趋势。还原气中含CO时,催化剂表相会生成活性物相FexC,且随着温度的升高逐渐发生ε-Fe_(2)C→ε′-Fe_(2.2)C→χ-Fe_(2.5)C→θ-Fe_(3)C的反应。
Fe-based catalysts have attracted much attention due to their advantages such as low cost,easy availability and wide operating temperature range.However,many disadvantages such as complex phase,uncertain active phase and the need to improve the performance of Fe-based catalysts are also the main problems.The research progress of Fe-based catalysts for Fischer-Tropsch to olefins(FTO)from syngas is reviewed.The process of reduction and activation is summarized and the effects of active phase on the FTO reaction properties are discussed.It is pointed out that the activation process is directly related to the atmosphere,and the overall reaction trend is progressive from the surface to the bulk.The active phase FexC is formed on the surface of catalyst,and the reaction ofε-Fe_(2)C→ε′-Fe_(2.2)C→χ-Fe_(2.5)C→θ-Fe_(3)C gradually occurs with the temperature.
作者
周晨亮
温媛
赫文秀
刘全生
ZHOU Chenliang;WEN Yuan;HE Wenxiu;LIU Quansheng(Inner Mongolia Key Laboratory of Coal Chemical Industry and Comprehensive Utilization,School of Chemistry and Chemical Engineering,Inner Mongolia University of Science&Technology,Baotou 014010,Inner Mongolia,China;Inner Mongolia Key L aboratory of High-Value Function Utilization of Low Rank Carbon Resource,Department of Chemical Engineering,Inner Mongolia University of Technology,Hohhot 010051,Inner Mongolia,China)
出处
《精细化工》
EI
CAS
CSCD
北大核心
2022年第1期17-23,共7页
Fine Chemicals
基金
内蒙古自治区自然科学基金项目(2020MS02024)。
关键词
低碳烯烃反应
Fe基催化剂
活化
活化过程
活性相
Fischer-Tropsch to olefins
Fe-based catalysts
activation
activation process
active phases
