燃料化学学报Issue(10)：1230-1238,9.
Ru添加对Co/SiO2费托合成催化剂性能的影响
Effect of ruthenium addition on the performance of Co/SiO2 catalyst for Fischer-Tropsch synthesis
摘要
Abstract
Three Co/SiO2 catalysts doped with different amounts of Ru were prepared by incipient wetness impregnation. These catalysts were characterized by N2 physisorption, XRD, H2-TPD, DRIFTS, etc.; their catalytic performance in Fischer-Tropsch ( F-T) synthesis was investigated in a micro fixed-bed reactor. The F-T reaction results showed that the Co/SiO2 catalysts doped with Ru exhibit higher CO conversion, higher turnover frequency ( TOF) , lower selectivity to CO2 and CH4 , as well as lower ratio of olefin to paraffin, in comparison with undoped Co/SiO2 . FT-IR spectra indicated that the Co-O bond in the as-prepared catalyst is weakened by the addition of Ru, which facilitates the reduction of the Co/SiO2 catalysts;such results are also supported by the H2-TPR profiles and XRD patterns of the reduced catalysts. The main cobalt phase in the reduced catalyst with 0. 5% (by weight) of Ru is in a hexagonal close packing (hcp) structure. CO-DRIFTS results revealed that the peak of linearly adsorbed CO is red-shifted by the addition of Ru, suggesting an improvement on the dissociation of adsorbed CO. CO-TPD results showed that the ratio of COads/Cos and CO*/Cos on catalysts surface is increased by the addition of Ru, which may contribute to the decrease of the selectivity to CH4 in F-T synthesis.关键词
Ru/钴催化剂/表面吸附性/F-T合成Key words
Ru/cobalt catalyst/surface adsorption/F-T synthesis分类
化学引用本文复制引用
邱成武,吴宝山,常强,李永旺..Ru添加对Co/SiO2费托合成催化剂性能的影响[J].燃料化学学报,2015,(10):1230-1238,9.基金项目
The project was supported by the National Natural Science Foundation of China (21273261).@@@@国家自然科学基金(21273261)资助项目 （21273261）
