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根据单层分散原理,设计了制备单层(或亚单层)分散型的合成低碳混合醇耐硫催化剂MoS_2/K_2CO_3/γ-Al_2O_3的新方法:先把比MoS_2易于分散的MoO_3分散到γ-Al_2O_3表面上形成单层或亚单层分散的MoO_3/γ-Al_2O_3母体,再进行硫化/还原,最后添加K_2CO_3。CO加氢反应结果证实:(1)该催化剂具有良好的抗硫性能;(2)以单个Mo原子计的活性较非单层(或亚单层)分散型的催化剂的活性成倍增加;(3)使低碳混合醇中C_2~+OH的含量增加,更符合作为汽油添加燃料的要求。
According to the principle of monolayer dispersion, a new method of preparing monolayer (or sub-monolayer) dispersion type MoS_2 / K_2CO_3 / γ-Al_2O_3 for low-sulfur mixed catalyst is proposed. Firstly, MoO_3, which is easier to disperse than MoS_2, -MgO_3 / γ-Al_2O_3 matrix was formed on the surface of Al_2O_3 with single layer or sub-monodispersed and then sulfided / reduced. Finally, K_2CO_3 was added. The results of CO hydrogenation confirmed that: (1) the catalyst has good sulfur resistance; (2) the activity in single Mo atom is multiplied more than the activity of non-monolayer (or sub-monolayer) dispersed catalyst; 3) Increasing the content of C_2 ~ + OH in low-carbon mixed alcohol is more in line with the requirement of adding fuel as gasoline.