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Ce添加对Cu-Fe/SiO2催化合成气制低碳醇性能的影响
引用本文:毛东森,郭强胜,俞俊,韩璐蓬,卢冠忠.Ce添加对Cu-Fe/SiO2催化合成气制低碳醇性能的影响[J].物理化学学报,2011,27(11):2639-2645.
作者姓名:毛东森  郭强胜  俞俊  韩璐蓬  卢冠忠
作者单位:上海应用技术学院化学与环境工程学院应用催化研究所, 上海 200235
基金项目:上海市科委,上海市教委曙光跟踪计划,上海市教委重点学科建设
摘    要:采用共浸渍法制备了添加不同Ce含量(相对于SiO2的摩尔分数为0-20%)的Ce-Cu-Fe/SiO2催化剂,在连续流动微型固定床反应器中考察了其催化CO加氢合成低碳醇反应的性能,并采用X射线衍射(XRD)、低温N2吸附、程序升温还原(H2-TPR)、CO吸附傅里叶变换红外光谱(CO-FTIR)和CO程序升温脱附(CO-TPD)技术对催化剂进行了表征.结果表吸:添加适量的Ce,一方面降低了Cu的晶粒大小,提高了Cu的分散度,进而提高了对CO的吸附能力;另一方面掺入的Ce和Cu之间存在相互作用,提高了CO解离和非解离吸附的能力,从而有利于CHx的生成和CO的插入反应.上述两方面的共同作用同时提高了Cu-Fe/SiO3催化剂的活性和醇的选择性.当Ce含量为10%时,在压力为3.0 MPa,温度为250℃,空速为6000 mL·g-1·h-1和H2/CO摩尔比为2的反应条件下,Ce-Cu-Fe/SiO2催化剂上醇的时空产率达到121.0 g·kg-1·h-1,比未添加Ce的Cu-Fe/SiO2催化剂的时空产率(58.0 g·kg-1·h-1)提高了一倍以上.

关 键 词:铈助剂  2催化剂'  ')  Cu-Fe/SiO2催化剂" target="_blank">">Cu-Fe/SiO2催化剂  合成气  催化加氢  低碳醇
收稿时间:2011-07-25
修稿时间:2011-09-13

Effect of Cerium Addition on the Catalytic Performance of Cu-Fe/SiO2 for the Synthesis of Lower Alcohols from Syngas
MAO Dong-Sen,GUO Qiang-Sheng,YU Jun,HAN Lu-Peng,LU Guan-Zhong.Effect of Cerium Addition on the Catalytic Performance of Cu-Fe/SiO2 for the Synthesis of Lower Alcohols from Syngas[J].Acta Physico-Chimica Sinica,2011,27(11):2639-2645.
Authors:MAO Dong-Sen  GUO Qiang-Sheng  YU Jun  HAN Lu-Peng  LU Guan-Zhong
Institution:Research Institute of Applied Catalysis, School of Chemical and Environmental Engineering, Shanghai Institute of Technology, Shanghai 200235, P. R. China
Abstract:A series of Ce-Cu-Fe/SiO_2 catalysts with different Ce contents(mole fraction relative to SiO_2, 0-20%) were prepared by co-impregnation and their catalytic performances for CO hydrogenation to lower alcohols were investigated using a continuous flow fixed bed micro-reactor.These catalysts were characterized by X-ray diffraction(XRD),N_2-adsorption,temperature-programmed reduction of H_2 (H_2-TPR),Fourier transform infrared of CO adsorption(CO-FTIR),and temperature-programmed desorption of CO(CO-TPD).The re...
Keywords:Cerium promoter  Cu-Fe/SiO_2 catalyst  Syngas  Catalytic hydrogenation  Lower alcohols  
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