完全液相法制CuZnAl合成二甲醚浆状催化剂的催化性能

利用完全液相法制备了CuZnAl浆状催化剂，考察了反应温度、反应压力、搅拌速度、原料气组成等工艺条件, 以及催化剂中各组分配比对浆态床合成气一步法合成二甲醚反应过程的影响。结果表明, 利用完全液相法制备的催化剂在升温段和降温段活性保持稳定，随着反应时间的延长，催化剂活性呈现增长趋势，且其水煤气变换反应速率很快。Cu/Zn/Al摩尔比为1∶1∶2.09时催化剂的CO转化率与DME 选择性最好。

Catalytic performance of CuZnAl slurry catalyst prepared by complete liquid phase technology for direct synthesis DME from syngas

CuZnAl slurry catalysts were prepared from the solution of these metal salts by a complete liquid phase technology and used directly for single-step synthesis of dimethyl ether (DME) from syngas.The effects of technological parameters including reaction temperature, pressure, rotator speed, inlet H₂/CO molar ratio in feed gas, as well as the ratios of components in catalyst were studied systematically.It was found that during raising and reducing temperature the activity of CuZnAl slurry catalysts could keep stability, even increased with increase of reaction time.Both conversion of CO and DME yield increased with raising pressure from 2.5 MPa to 5.5 MPa, while the selectivity of DME changed little.The water-gas shift reaction over CuZnAl slurry catalysts proceeded very fast.Among the catalysts investigated in this work, the CuZnAl slurry catalyst with molar ratio of 1∶1∶2.09 was the best one.