CuO-Bi2O3-MgO/γ-Al2O3催化剂的制备及催化合成1,4-丁炔二醇的研究

摘要

A series of CuO-Bi2O3-MgO/γ-Al2O3 catalysts with different Mg loading were prepared by incipient wetness impregnation method, and their structure and properties were characterized by N2-BET, XRD and TPR. The performances of the catalysts for synthesis of 1,4-butynediol by ethynylation of formaldehyde were investigated. The results showed that the catalytic activity and selectivity of the CuO-Bi2O3/γ-Al2O3 catalyst could be significantly improved by dipping appropriate amount of MgO, and the catalyst 30%CuO-2%Bi2O3-1%MgO/γ-Al2O3 prepared by co-impregnating the γ-Al2O3 which had dipped MgO of 1% by mass and calcined at 700℃with the solution of Cu (NO3)2 and Bi (NO3)3 then calcining at 500℃performed the best, which could give the yield and selectivity of 1,4-butynediol of 67.9%and 90.3%, respectively.%采用等体积浸渍法制备了系列不同MgO含量的CuO-Bi2O3-MgO/γ-Al2O3催化剂，用N2-BET、XRD和TPR对其进行表征，并考察了其催化甲醛溶液和乙炔合成1,4-丁炔二醇的性能。结果表明，添加适量的MgO可显著改进催化剂的活性和选择性，其中γ-Al2O3先负载质量分数1%的MgO，700℃焙烧后，再共浸渍CuO和Bi2O3后500℃焙烧制备的30%CuO-2%Bi2O3-1%MgO/γ-Al2O3催化剂性能较好，1,4-丁炔二醇产率和选择性可分别达到67.9%和90.3%。