不同载体对负载型Cu-Fe催化剂CO加氢反应性能的影响  

Effects of different supports on the catalytic performance of supported Cu-Fe catalyst for CO hydrogenation

作　　者：郭强胜[1] 毛东森[1] 俞俊[1] 韩璐蓬[1] 

机构地区：[1]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201418

出　　处：《燃料化学学报》2012年第9期1103-1109,共7页Journal of Fuel Chemistry and Technology

基　　金：上海市科委(08520513600);上海市教委重点学科建设(J51503)

摘　　要：以不同的氧化物为载体,采用共浸渍法制备了一系列负载型的Cu-Fe催化剂Cu-Fe/MOx(MOx=ZnO、ZrO2、TiO2、SiO2、MgO、Al2O3),并采用X射线衍射(XRD)、N2吸附(N2-adsorption)、程序升温还原(H2-TPR)和一氧化碳程序升温脱附(CO-TPD)技术对催化剂进行了表征。在温度为250℃、压力为3 MPa和原料气空速为6 000 mL/(g.h)的反应条件下,在连续流动微型固定床反应装置上考察了其催化CO加氢合成低碳醇的反应性能。结果表明,与其他氧化物为载体的催化剂相比,Cu-Fe/SiO2催化剂表面CuO的分散度较高,在较低的温度下容易被还原,具有较强的CO吸附能力,从而同时具有较高的活性和低碳醇选择性。A series of supported Cu-Fe catalysts with different oxides（ZnO,ZrO2,TiO2,SiO2,MgO,Al2O3） as support were prepared by co-impregnation method,and were characterized by XRD,N2-adsorption,H2-TPR and CO-TPD.Their catalytic performances for the synthesis of higher alcohols through CO hydrogenation were investigated in a continuous flow fixed bed micro-reactor at 250 ℃ under 3 MPa with the space velocity of 6 000 mL/（g·h）.The results indicated that SiO2 supported Cu-Fe catalyst（Cu-Fe/SiO2） possessed high CuO dispersion which could be easily reduced at low temperatures,and had strong capability for CO adsorption,therefore,exhibited both higher CO conversion and higher selectivity to higher alcohols.

关 键 词：载体 Cu-Fe催化剂 CO加氢 低碳醇 

分 类 号：O643[理学—物理化学]