论文部分内容阅读
采用吸附相反应技术(APRT)制备了Cu基催化剂,并用XRD、HRTEM、H2-TPR等表征手段进行了分析。结果表明催化剂中的Cu良好分散于载体表面,粒径在5~10 nm。在液相乙醇体系合成气制甲醇的反应中,该Cu基催化剂对第一步形成中间产物甲酸乙酯的催化活性远高于工业催化剂。APRT制备的催化剂与其他催化剂(包括工业催化剂)在液相合成气制甲醇的两步反应中表现出的显著差异,不仅说明APRT催化剂具有不同的结构特点,也表明甲酸乙酯的形成和进一步的加氢的活性位是不同的。
Cu-based catalysts were prepared by adsorption phase reaction (APRT) and characterized by XRD, HRTEM and H2-TPR. The results show that the Cu in the catalyst is well dispersed on the surface of the carrier with particle size of 5 ~ 10 nm. The catalytic activity of the Cu-based catalyst for the formation of the intermediate ethyl formate in the first step is much higher than that of industrial catalysts in the reaction of methanol in the liquid ethanol synthesis syngas. The significant differences between APRT-prepared catalysts and other catalysts, including commercial catalysts, in the two-step reaction of methanol in liquid phase syngas show not only the different structural features of the APRT catalyst, but also the formation of ethyl formate and further Hydrogenation of the active site is different.