燃料化学学报Issue(4)：455-460,6.
SBA-15的疏水改性及其对钴基催化剂费-托合成催化性能的影响
Hydrophobic modification of SBA-15 and its influence on the properties of cobalt-based catalysts for Fischer-Tropsch synthesis
摘要
Abstract
SBA-15 supports modified by different hydrophobic reagents ( methyltriethoxysilane, dimethyldiethoxysilane and chlorotrimethylsilane ) were prepared before the impregnation of cobalt precursor. The effects of hydrophobic modification on the crystallite structure and the reduction behaviors were studied by BET, FT-IR, 29Si CP MAS NMR, XRD, and H2-TPR. Fischer-Tropsch (F-T) synthesis performances were evaluated in a fixed-bed reactor at 2. 0 MPa, 200 ~ 250 ℃, H2/CO ( volume ratio) = 2, and GHSV =1 000 h-1 . The result indicated that hydrophobic modification led to the increase in reduction degree of the supported cobalt, resulting in the increase of CO conversion of cobalt catalysts for F-T synthesis. Moreover, due to the increase of Co3 O4 crystallite size and the decrease of un-reducible cobalt compound after hydrophobic modification, CH4 selectivity decreased and C5+ selectivity increased.关键词
钴催化剂/SBA-15/疏水改性/费-托合成Key words
cobalt catalyst/SBA-15/hydrophobic modification/Fischer-Tropsch synthesis分类
化学化工引用本文复制引用
李晓峰,赵俊秀,石利红..SBA-15的疏水改性及其对钴基催化剂费-托合成催化性能的影响[J].燃料化学学报,2014,(4):455-460,6.基金项目
国家自然科学基金青年项目(21306108) （21306108）
山西省自然科学基金(2013011009-5) （2013011009-5）
山西大学第十一期本科生科研训练项目。 （）
