硅球负载高分散钴基催化剂的制备及其费-托合成催化性能研究  

Preparation of Highly Dispersed Silicon Spheres Supported Cobalt-based Catalysts and Their Catalytic Performance for Fischer-Tropsch Synthesis

作　　者：代银昊 刘佳[1] 张萌 张煜华[1] 李金林[1] 洪景萍[1] DAI Yinhao;LIU Jia;ZHANG Meng;ZHANG Yuhua;LI Jinlin;HONG Jingping(Key Laboratory of Catalysis and Energy Materials Chemistry of Ministry of Education,Hubei Key Laboratory of Catalysis and Materials Science,South-Central Minzu University,Wuhan 430074,China)

机构地区：[1]中南民族大学、催化转化与能源材料化学教育部重点实验室、催化材料科学湖北省重点实验室,湖北武汉430074

出　　处：《化学与生物工程》2023年第12期22-26,38,共6页Chemistry & Bioengineering

基　　金：国家自然科学基金项目(21972170)。

摘　　要：采用等体积浸渍法将钴盐前驱体浸渍在结构规整的硅球(SP)载体上,利用辉光放电等离子体技术分解钴盐前驱体,制备了一系列高分散Co/SP催化剂,采用透射电子显微镜、氮气物理吸附-脱附、傅立叶变换红外光谱、X-射线光电子能谱、氢气程序升温还原、X-射线粉末衍射等手段对催化剂结构进行了表征,并在固定床反应器上进行费-托合成催化性能测试,探讨等离子体处理真空度对费-托合成催化性能的影响。结果表明,等离子体处理真空度主要影响Co/SP催化剂上钴物种的分散度,对其还原性能影响不大;Co/SP催化剂的费-托合成催化性能与其钴物种分散度直接相关,分散度越高,催化活性越高。In this paper,we firstly impregnated cobalt salt precursors onto structured silicon spheres(SP)by an incipient-wetness impregnation method,and then prepared a series of highly dispersed Co/SP catalysts through decomposing the cobalt salt precursors by using glow discharge plasma technology.Moreover,we characterized the structure of the catalysts by transmission electron microscopy,N 2 physical adsorption-desorption,Fourier transform infrared spectroscopy,X-ray photoelectron spectroscopy,H 2 temperature-programmed reduction,and X-ray powder diffraction.Furthermore,we explored the effect of plasma treating vacuum on the catalytic performance for Fischer-Tropsch synthesis through a test in a fixed bed reactor.The results show that the plasma treating vacuum mainly affects the dispersion of cobalt species on Co/SP catalysts,and has a negligible effect on the reducibility.The catalytic performance of Co/SP catalyst for Fischer-Tropsch synthesis is directly related to cobalt dispersion,with higher dispersion leading to higher catalytic activity.

关 键 词：费-托合成 钴基催化剂 辉光放电等离子体 构效关系 

分 类 号：O621.254[理学—有机化学]