Co/Al_2O_3-SiO_2催化剂的F-T反应性能的研究  

Study on the F-T reaction performance of Co/Al_2O_3-SiO_2 catalyst

作　　者：郭舒鹏 王民 王俊刚[1] 马中义[1] 贾丽涛[1] 侯博[1] 李德宝[1] GUO Shu-peng;WANG Min;WANG Jun-gang;MA Zhong-yi;JIA Li-tao;HOU Bo;LI De-bao(State Key Laboratory of Coal Conversion,Institute of Coal Chemistry,Chinese Academy of Sciences,Taiyuan 030001,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]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 [2]中国科学院大学,北京100049

出　　处：《燃料化学学报》2018年第2期198-203,共6页Journal of Fuel Chemistry and Technology

基　　金：山西省基础研究基金(201601D021044;201701D121037)资助~~

摘　　要：通过浸渍法制备不同含量SiO_2改性的Co/Al_2O_3催化剂,结合N2吸附-脱附、XRD、H2-TPR、XPS等表征手段,研究SiO_2助剂对钴基催化剂物相结构、还原行为及F-T合成性能的影响。结果表明,适量的SiO_2改性后,有效地减弱了载体与活性组分钴之间的相互作用,显著地提高了催化剂的还原度和催化活性。但继续增加SiO_2的含量,催化剂的还原度继续提高,分散度同时下降32%,与未改性之前相比,催化剂的活性基本没有改变。Theγ-Al2O3 modified with different content of SiO2 by impregnation method was used as supports to prepare Co/Al2O3 catalyst.The effects of SiO2 additives on phase structure of the cobalt-based catalysts,reduction behavior and the influence on the F-T synthesis performance were studied by using N2 adsorption,XRD,H2-TPR and XPS characterization methods and activity test.The results showed that with the introduction of SiO2,the interaction between support and cobalt was effectively weakened,thus the reducibility and catalytic activity of the catalysts were significantly improved.However,when the amount of SiO2 continued to increase,the reduction degree of the catalyst continued to improve,but the dispersion decreased by 32%at the same time.Compared with unmodified Co/Al2O3 catalyst,the activity of the catalyst remained basically unchanged.

关 键 词：费托合成 二氧化硅改性 还原度 

分 类 号：O643[理学—物理化学]