Co/SiO_(2)预处理制备高活性低CH_(4)选择性FT合成催化剂  

Pretreating Co/SiO_(2) to generate highly active Fischer-Tropsch synthesis catalyst with low CH_(4) selectivity

作　　者：穆仕芳 尚如静[3] 陈建刚 张建利[4] MU Shi-fang;SHANG Ru-jing;CHEN Jian-gang;ZHANG Jian-li(School of Safety Science and Engineering,Henan Polytechnic University,Jiaozuo 454000,China;State Key Laboratory of Coal Conversion,Institute of Coal Chemistry of Chinese Academy Sciences,Taiyuan 030001,China;School of Physics&Electronic Information Engineering,Henan Polytechnic University,Jiaozuo 454000,China;State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering,Ningxia University,Yinchuan 750021,China)

机构地区：[1]河南理工大学安全科学与工程学院,河南焦作454000 [2]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001 [3]河南理工大学物理与电子信息学院,河南焦作454000 [4]宁夏大学省部共建煤炭高效利用与绿色化工国家重点实验室,宁夏银川750021

出　　处：《燃料化学学报》2021年第11期1592-1598,共7页Journal of Fuel Chemistry and Technology

基　　金：The project was supported by the Foundation of State Key Laboratory of Coal Conversion(J20-21-612);the Initiation Foundation of Henan Polytechnic University(B2019-54);Henan Key Laboratory of Coal Green Conversion(CGCF201910).

摘　　要：采用TEM、HRTEM、XRD、XPS、H_(2)-TPD、TG和TPR研究了三种预处理方法(DR、R、ROR)对Co/SiO_(2)催化剂微观结构和费托合成(FTS)反应性能的影响。结果表明,经过预处理后,Co物种的特定形态发生变化,形成新的Co活性表面物种,Co粒子重新分散,Co物种易于再还原。不同方法预处理的Co/SiO_(2)催化剂表现出不同的催化性能,经还原钝化处理的催化剂具有较高的FTS活性和C_(5+)选择性。The effects of pretreatment methods(DR,R,ROR)on the microstructure of Co/SiO_(2) catalysts and the activity for Fischer-Tropsch synthesis(FTS)were investigated.The pretreated catalysts were characterized by TEM,HRTEM,XRD,XPS,H_(2)-TPD,TG and TPR.The results showed that after the pretreatments,specific morphological of the Co species changed,forming new Co active surface species.The Co particles redispersed and the Co species was facile to be re-reduced.The Co/SiO_(2) catalysts pretreated by different method showed different catalytic performance.The catalyst treated by the reduction-passivation had higher activity and C_(5+)selectivity for FTS.

关 键 词：预处理方法 Co/SiO_(2)催化剂 费托合成 

分 类 号：O643.36[理学—物理化学]