SiO_2在费托合成沉淀铁基催化剂中作用的研究进展  

Research process of effects of silicon dioxide promoter on iron based catalyst for Fischer-Tropsch synthesis

作　　者：武鹏[1] 石玉林[1] 吕毅军[1] 门卓武[1] 吴秀章[1] 

机构地区：[1]中国神华煤制油化工有限公司北京研究院,北京100011

出　　处：《煤炭学报》2010年第9期1531-1536,共6页Journal of China Coal Society

摘　　要：煤基费托合成工艺中浆态床反应器的广泛应用对沉淀铁催化剂的稳定性和强度提出了更高的要求。实践证明,结构助剂,尤其是硅,能够提高沉淀铁催化剂的稳定性和强度。基于国内外目前对于费托合成沉淀铁催化剂中助剂SiO2的最新研究进展,重点从SiO2源、加入方式和SiO2含量三个方面总结分析了硅对费托合成沉淀铁催化剂反应性能和强度的影响。认为不同硅源对同一沉淀铁催化剂体系的作用仍值得进一步加以研究。根据不同加硅阶段将加硅方式分两类——沉淀硅和黏结剂硅,分别总结了它们在沉淀铁催化剂中的作用。由于SiO2与铁具有较强的相互作用,SiO2的含量也并非越高越好,因此应根据特定的催化剂体系确定最优含量。另外,对SiO2在煤基费托合成沉淀铁催化剂的工业应用中的研究提出了一点建议。The stability and attrition resistance of a precipitated iron catalyst have become more concerns,especially with the abroad application of the slurry bubble column reactor（SBCR） in the coal-base Fischer-Tropsch synthesis.The practices prove that structural promoters,especially SiO2,generally used in iron catalyst can improve the attrition resistance and stability significantly.Based on the recent research of SiO2 in Fe-based catalysts of the Fischer-Tropsch synthesis,paid particular attentions to the influence of SiO2 sources,types and concentration in precipitated iron catalysts on the performance of the Fischer-Tropsch synthesis and attrition resistance.The influences of different SiO2 sources in a precipitated iron catalyst are still worthy of further study.According to the different stages during adding SiO2 to the catalyst,SiO2 additions were classified into two types（i.e.,precipitated SiO2 and binder SiO2）.It was also summed up that the effects of these two SiO2 additions in precipitated iron catalysts.Due to the strong interaction between SiO2 and iron,there should be an optimal amount of SiO2 concentration in the specific catalyst system rather than as high as possible.In addition,it was also given some suggestions for the research of SiO2 in coal-base Fischer-Tropsch precipitated iron catalysts for the industrial applications.

关 键 词：SIO2 费托合成 沉淀铁催化剂 黏结剂硅 沉淀硅 

分 类 号：TQ529.2[化学工程—煤化学工程]