作　　者： ; ; ; (庞海舰）; (王正平）;

机构地区： 哈尔滨工程大学化工学院

出　　处： 《黑龙江科技学院学报》 2006年第1期34-37,共4页

摘　　要： 针对共沉淀法存在的催化剂元素混合不均、比表面积小、导热差、催化剂容易失活等问题,分别采用共沉淀法和浸渍法制备了两种Mo-B i-Fe-Co基催化剂。所得浸渍法制备催化剂的最佳制备条件为:浸渍时间为6 h,浸渍液浓度为1.25 mol/L(以Mo的摩尔浓度为标准),浸渍次数为2次,柠檬酸加入量为Mo/C itric acid=1.3,煅烧温度为620℃。在温度为380℃、空速为7 200 h-1、异丁烯与空气比为6∶94的反应条件下,该催化剂的转化率和选择性分别为88.9%和68.0%。浸渍法制得的催化剂的活性明显优于共沉淀法制备的催化剂。 As some questions present for the catalyst prepared method of co - precipitation such as the element can not mix well, the BET is small, the heat exchange is worse, the catalyst is easy to unactire. Two Mo-Bi-Fe-Co-based catalysts were prepared with co -precipitation and impregnation. The result of reaction showed that the catalyst with impregnation preformatted better than the one with co -precipitation. The best preparation condition was that, impregnation time 6 hours, the density of Mo in the impregnation solution was 1.25 mol/L,impregation times was 2 times, Mo/Citric acid = 1.3, calcine temperature was 620 ℃. Under the preparation condition, the catalyst preformatted the best result , the conversion was 88.9% and selectivity was 68.0% with the reaction condition was that reaction temperature was 380 ℃, GSHV = 7 200 h^-1, Isobutylene/Air = 6： 94.

关 键 词： 共沉淀法 浸渍法 异丁烯 甲基丙烯醛

领　　域： [化学工程]