| abstract |
The invention provides a methanol synthesis catalyst and a preparation method thereof, belonging to the technical field of catalysts. The mixed solution of Cu(NO 3 ) 2 and Zn(NO 3 ) 2 is subjected to a co-precipitation reaction with a precipitant, and 0.5% to 5% (wt.) of an auxiliary agent is added. Control process temperature, pH value and pH value of precipitation end point. The co-precipitation reaction was carried out under the action of ultrasound, the ultrasonic frequency was 15KHz~30KHz, and the ultrasonic action time was 15min~100min. After washing, the precursor is obtained; the precursor is mixed and slurried with an alumina carrier to obtain a catalyst slurry; granulation and drying are carried out by spray drying, and roasting and flakes are formed to prepare a finished methanol catalyst. The methanol synthesis catalyst prepared by the method of the invention has a larger specific surface area, fine CuO and ZnO crystal grains, more reasonable pore size distribution, and better catalyst activity and thermal stability. Suitable for synthesis gas containing CO, CO2 and H2 to methanol. |