摘要
分别采用溶胶-凝胶法和溶胶-凝胶水热法制备了TiO2-SiO2复合氧化物,采用等体积浸渍法制备了Co/TiO2-SiO2催化剂。采用N2吸脱附、XRD、Raman、XPS、TPR等手段考察了载体制备方法对催化剂结构的影响,考察了载体制备方法对催化剂费-托合成反应性能的影响。结果表明,溶胶-凝胶水热法制备的TiO2-SiO2复合氧化物具有较高的比表面积,在提高Co物种还原度的同时,有利于更多的Co物种在载体表面分散,进而提高了催化剂对费-托合成反应的催化活性,降低了甲烷的选择性,并提高了C5+烃的选择性。
TiO2-SiO2 supports were prepared by means of Sol-Gel and Sol-Gel（hydrothermal）,respectively.Co/TiO2-SiO2 catalysts were prepared by incipient wetness impregnation.The effects of support preparation methods on the structure of Co/TiO2-SiO2 and its catalytic activity for Fischer-Tropsch synthesis（FTS） were investigated by means of N2 adsorption,XRD,Raman,XPS,TPR and CO hydrogenation.Higher specific surface area was found in TiO2-SiO2 supports prepared by Sol-Gel（hydrothermal）,which could improve the dispersion and reduction degree of Co in Co/TiO2-SiO2 catalyst,resulting in the remarkable enhancement of the FTS activity of the catalyst with higher C＋5 selectivity and lower CH4 selectivity.
出处
《石油学报（石油加工）》
EI
CAS
CSCD
北大核心
2012年第2期219-224,共6页
Acta Petrolei Sinica(Petroleum Processing Section)
基金
国家重点基础研究“973”项目(2005CB221402)资助
