不同前驱体制备Co/CNTs催化剂应用于费托合成  

Co/CNTs catalysts prepared from different precursors for Fischer-Tropsch synthesis

作　　者：房浩 唐立平 郭文杰 贾晶晶 胡莹莹 李超 Fang Hao;Tang Liping;Guo Wenjie;Jia Jingjing;Hu Yingying;Li Chao(School of Chemical Engineering and Safety Engineering,Binzhou University,Binzhou 256603,Shandong,China)

机构地区：[1]滨州学院化工与安全学院,山东滨州256603

出　　处：《工业催化》2022年第5期22-27,共6页Industrial Catalysis

基　　金：国家自然科学基金青年基金(51904032);山东省大学生创新项目(S202110449167);滨州学院科研启动经费(2018Y16)。

摘　　要：以Co_(2)(CO)_(8)和Co(NO_(3))2分别为前驱体,采用等量浸渍法将活性金属负载于CNTs上,将负载后的催化剂在400℃下H_(2)气氛中分解,并用0.5%O_(2)/N_(2)钝化,制备得到Co/CNTs催化剂。采用X射线衍射、N_(2)低温物理吸附-脱附、H_(2)程序升温还原、CO程序升温脱附和透射电镜等对负载型催化剂进行表征分析,并在固定床反应器上考察两种催化剂在F-T合成反应中的催化性能。结果表明,以Co_(2)(CO)_(8)为前驱体制备的催化剂较Co(NO_(3))_(2)制备的催化剂具有更高的CO转化率,并且C_(2)~C_(4)产物明显增加,C_(5+)以上产物明显减少。Active metal was supported onto CNTs by equal impregnation using Co_(2)(CO)_(8)and Co(NO_(3))_(2)as precusors.The supported catalysts were decomposed at 400℃in H_(2)atmosphere and passivated with 0.5%O_(2)/N_(2).The Co/CNTs catalysts were characterized by X-ray powder diffraction(XRD),N_(2)adsorption measurments,H_(2)temperature-programmed reduction(H_(2)-TPR),CO temperature-programmed desorption(CO-TPD)and transmission electron microscope(TEM)to study the effects of different precursors on supported catalysts.The catalysts were tested for Fischer-Tropsch synthesis in a fixed bed reactor and the results showed that the catalyst prpared with Co_(2)(CO)_(8)as precursor had higher catalytic activity,higher selectivity of C_(2)-C_(4)and lower selectivity of C_(5+).

关 键 词：催化化学 催化剂 合成气 固定床 前驱体 F-T合成 C_(2)~C_(4) 

分 类 号：O643.36[理学—物理化学] TQ426.6[理学—化学]