不同合成方法制备FeMnK/ZSM-5催化剂结构与催化性能研究  

Study on the Catalytic Performance of FeMnK/ZSM-5 Catalysts Prepared by Different Synthesis Methods

作　　者：张竟月 关倩[1,2] 徐海燕[1,2] 杨树华[1,2] 李在峰[1,2] ZHANG Jingyue;GUAN Qian;XU Haiyan;YANG Shuhua;LI Zaifeng(Energy Research Institute Co.Ltd.,Henan Academy of Sciences,Zhengzhou 450008,China;Henan Key Lab of Biomass Energy,Zhengzhou 450008,China)

机构地区：[1]河南省科学院能源研究所有限公司,郑州450008 [2]河南省生物质能源重点实验室,郑州450008

出　　处：《河南科学》2024年第9期1258-1264,共7页Henan Science

基　　金：河南省科学院创新团队项目(20230109);中原科技创新领军人才项目(244200510017);河南省科学院基本科研经费项目(240606066)。

摘　　要：以ZSM-5为载体,通过旋蒸法、冷冻干燥法和直接烘干法三种不同的干燥方法制备得到FeMnK/ZSM-5型催化剂.利用N_(2)物理吸附(BET)、透射电子显微镜(TEM)、X射线光电子能谱(XPS)、NH_(3)/CO程序升温脱附(NH_(3)/CO-TPD)等现代分析手段对所得催化剂进行结构表征.在n(H_(2))/n(CO)=2,反应温度T=320℃,反应压力P=2.5 MPa,反应空速G=1000 h^(-1)的反应条件下,对所得催化剂进行性能评价.结果表明:CO转化率最高可达90.42%,CH_(4)的选择性为13.45%,C_(2-4)^(=)的选择性为40.77%,C_(2-4)^(0)的选择性为6.24%,C_(5)^(+)的选择性为39.54%.综合考虑分析得到,冷冻干燥法所制备的FeMnK/ZSM-5型催化剂在催化合成烯烃方面性能较优.This article utilized ZSM-5 as a carrier to prepare FeMnK/ZSM-5 catalysts using three different drying methods:rotary evaporation,freeze-drying,and direct drying.The structure of the obtained catalysts was characterized using modern analytical methods including N_(2) physical adsorption(BET),transmission electron microscopy(TEM),X-ray photoelectron spectroscopy(XPS),and NH₃/CO temperature-programmed desorption(NH_(3)/CO-TPD).The performance of the obtained catalysts was evaluated under the following reaction conditions:n(H_(2))/n(CO)=2,reaction temperature T=320°C,reaction pressure P=2.5 MPa,and reaction space velocity G=1000 h^(-1).The results show that the maximum CO conversion rate reached 90.42%,the selectivity for CH_(4)is 13.45%,the selectivity for C_(2-4)^(=)is 40.77%,the selectivity for C_(2-4)^(0) is 6.24%,and the selectivity for C_(5)^(+)is 39.54%.After comprehensive consideration and analysis,it can be concluded that the FeMnK/ZSM-5 catalyst prepared using the freeze-drying method exhibits superior performance in the catalytic synthesis of olefins.

关 键 词：合成气 低碳烯烃 铁基催化剂 冷冻干燥 

分 类 号：TK6[动力工程及工程热物理—生物能]