摘要
选用不同Al2O3载体,采用浸渍法制备负载型铁基催化剂,利用N2-物理吸附(BET)、X射线衍射(XRD)、H2程序升温还原(H2-TPR)、CO/CO2程序升温脱附(CO/CO2-TPD)对催化剂进行表征,在空速为1000 h?1、反应温度为320℃、反应压力为2 MPa条件下,考察了不同Al2O3载体对铁基催化剂CO加氢性能的影响。结果表明:比表面积大的催化剂有利于活性组分的分散,提高了催化剂的反应活性。表面碱度高的催化剂,有利于提高CO解离吸附,提高CO的转化率和低碳烯烃的选择性。
A series of Fe-based catalysts with different Al2O3 supports were prepared by slurry-impregnation method, characterized by BET, XRD, H2-TPD and CO/CO2-TPD, and tested under the conditions of T = 320?C, P = 20 bar, GHSV= 1000 h?1. The results indicated that high surface area of catalysts had high dispersion, leading to high catalytic activity for CO hydrogenation performance. The high ca- talyst basicity enhanced CO adsorption and dissociation, accordingly, increased the catalytic acti- vity of the catalyst and the selectivity of light alkenes.
出处
《化学工程与技术》
2017年第3期108-117,共10页
Hans Journal of Chemical Engineering and Technology
