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采用均匀凝胶法制备了CuO-ZnO-Al2O3-Cr2O3/HZSM-5催化剂,采用X射线衍射(XRD)、傅立叶红外光谱(FT-IR)和热重-差热分析(TG-DTA)进行了表征,并在固定床微型反应器中考察了反应温度、反应压力,CuO与ZnO质量比、Al2O3和Cr2O3的质量分数对CuO-ZnO-Al2O3-Cr2O3/HZSM-5催化剂在CO2加氢制备二甲醚反应中催化性能的影响。结果表明,在533 K,3 MPa,H2与CO2体积比为3和反应混合气体积空速为1 600 h-1的条件下,在CuO与ZnO质量比2,Al2O3和Cr2O3分别占催化剂质量的10.0%和1.5%的CuO-ZnO-Al2O3-Cr2O3/HZSM-5催化剂作用下,CO2的单程转化率达到28.94%,二甲醚的选择性和收率分别为31.76%和8.76%,甲醇和二甲醚的总收率达到13.98%。
The CuO-ZnO-Al2O3-Cr2O3 / HZSM-5 catalysts were prepared by homogeneous gel method and characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and TG-DTA The reaction temperature, reaction pressure, the mass ratio of CuO to ZnO and the mass fraction of Al2O3 and Cr2O3 were investigated in a fixed-bed microreactor. The results showed that the reaction of CuO-ZnO-Al2O3-Cr2O3 / HZSM- Effect of Catalytic Performance in Ether Reaction. The results show that when mass ratio of CuO to ZnO is 2, Al2O3 and Cr2O3 are the mass of catalyst at 533 K, 3 MPa, the volume ratio of H2 to CO2 is 3 and the space velocity of reaction gas is 1 600 h-1, respectively Under the action of 10.0% and 1.5% CuO-ZnO-Al2O3-Cr2O3 / HZSM-5 catalyst, the single pass conversion of CO2 reached 28.94%, the selectivity and yield of dimethyl ether were 31.76% and 8.76% The total yield of methyl ether reached 13.98%.