A new method of low-temperature methanol synthesis on Cu/ZnO/Al2O3 catalysts from CO/CO2/H2
A new method of low-temperature methanol synthesis on Cu/ZnO/Al2O3 catalysts from CO/CO2/H2
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DOI：
10.1016/j.fuel.2007.06.020
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发表时间：
2008-04
期刊：
影响因子：
7.4
通讯作者：
Ruiqin Yang;Xiaocai Yu;Yi Zhang;Wenze Li;N. Tsubaki
中科院分区：
文献类型：
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作者：
Ruiqin Yang;Xiaocai Yu;Yi Zhang;Wenze Li;N. Tsubaki
以异丁醇为助剂，以CO/CO2/H_2为原料，在铜/氧化锌/氧化铝催化剂上进行了低温甲醇合成新方法的研究。用硝酸铜和硝酸锌的水溶液浸渍r-Al_2O_3制备了Cu/ZnO/Al_2O_3催化剂。当铜负载量为5%、锌铜摩尔比为1/1、前驱体未焙烧、还原温度为493K时，催化剂的总碳周转频率(TOF)、甲醇的产率和选择性最高。催化剂活性的提高主要是由于CuO/ZnO相的存在，以氧化态的形式浸渍在催化剂上。铜/氧化锌/氧化铝催化剂的甲醇合成活性中心不仅是金属铜，而且还有铜锌中心等特殊中心，即金属铜和铜锌中心协同催化甲醇合成反应。
A new synthesis method of low-temperature methanol proceeded on Cu/ZnO/Al2O3catalysts from CO/CO2/H2using 2-butanol as promoters. The Cu/ZnO/Al2O3catalysts were prepared by co-impregnation of r-Al2O3with an aqueous solution of copper nitrate and zinc nitrate. The total carbon turnover frequency (TOF), the yield and selectivity of methanol were the highest by using the Cu/ZnO/Al2O3catalyst with copper loading of 5% and the Zn/Cu molar ratio of 1/1, which precursor were not calcined, and reduced at 493K. The activity of the catalysts increased due to the presence of the CuO/ZnO phase in the oxidized form of impregnation Cu/ZnO/Al2O3catalysts. The active sites of the Cu/ZnO/Al2O3catalyst for methanol synthesis are not only metallic Cu but also special sites such as the Cu–Zn site, i.e. metallic Cu and the Cu–Zn site work cooperatively to catalyze the methanol synthesis reaction.