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：张萌 刘佳[1] 张煜华[1] 王立[1] 李金林[1] 洪景萍[1] ZHANG Meng;LIU Jia;ZHANG Yu-hua;WANG Li;LI Jin-lin;HONG Jing-ping(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：《燃料化学学报（中英文）》2023年第5期608-615,共8页Journal of Fuel Chemistry and Technology

摘　　要：利用等体积浸渍法将钴前驱体浸渍在结构规整的硅球(SP)载体上,在不同强度的等离子体场中分解钴盐,制备出一系列高分散Co/SP催化剂。采用X射线粉末衍射、氮气物理吸附-脱附、扫描透射电子显微镜和傅里叶红外变换光谱等表征手段对催化剂结构进行表征,并在固定反应器上进行费-托合成催化性能测试,探讨等离子体处理强度对费-托合成催化剂的分散度、还原度、相互作用的影响规律。结果表明,等离子体处理催化剂在费-托合成反应中表现出比焙烧样品更优越的催化性能,其中,Co/SP-P650W由于具有较适宜的分散度和相对较高的还原性,呈现出最高的费-托合成反应活性。A series of silicon spheres supported cobalt catalysts were prepared by incipient wetness impregnation followed by decomposition under treatment of glow discharge plasma with different intensities.The catalysts were characterized by X-ray powder diffraction,N_(2) physical adsorption-desorption,H_(2) temperature-programmed reduction,transmission electron microscope and Fourier-Transform Infrared spectroscopy.The Fischer-Tropsch synthesis performance were tested on a fixed bed reactor.The influence of plasma treatment on cobalt dispersion,reducibility and cobalt-support interaction were analyzed and discussed.The results showed that the plasma-treated catalysts had better catalytic performance than the calcined sample.The Co/SP-P650W catalyst showed the highest reaction activity due to the proper cobalt dispersion and higher cobalt reducibility.

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：TQ529.2[化学工程—煤化学工程] TQ426