选择Cu/Zn/Al2O3和拟薄水铝石，同时添加助剂，采用挤条法成型合成气一步法制备二甲醚的双功能催化剂，通过对催化剂进行强度测试、表征和性能评价，确定了最佳的催化剂制备条件为：Cu/Zn/Al2O3与拟薄水铝质量比1∶1，胶溶剂硝酸质量分数为4%，助挤剂质量分数柠檬酸为5%、田菁粉为2.5%，用水量与原料粉体的质量比为0.60。在此条件下制备的催化剂，其强度可达153N/cm，在250℃、3MPa、2500mL/(g·h)的条件下，催化剂CO转化率为79.8%，二甲醚的选择性为49.1%，甲醇的选择性为15.2%。%The Cu/Zn/Al2O3 was mixed with pseudo boehmite and extrusion assistants to prepare the shaped bi-functional catalyst for one-step synthesis of dimethyl ether from syngas by extrusion. Through strength measurement, characterization and activity tests of the shaped catalysts, the optimal extrusion shaping conditions were determined as follows: mass ratio of Cu/Zn/Al 2O3 to pseudo boehmite of 1 ∶ 1, peptizer (HNO3) mass fraction of 4%, lubricants citric acid and sesbaria cannabina powder of 5% and 2.5%, respectively, and mass ratio of water to solid material of 0.60. The catalyst shaped at the optimized conditions had a strength of about 153N/cm, and over it, under 250℃, 3MPa and GHSV of 1500mL/(g·h), CO conversion was 79.8% with a DME selectivity of 49.1%and a methanol selectivity of 15.2%.
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