低温液相合成甲醇催化剂制备条件对催化性能的影响

INFLUENCE OF PREPARATION PARAMETERS ON THE CATALYTIC PERFORMANCE OF CATALYST FOR METHANOL SYNTHESIS AT LOW TEMPERATURE AND IN LIQUID PHASE

采用络合沉淀法合成了铜铬催化剂,用于催化低温液相合成甲醇反应过程。以甲醇的时空产率为指标,研究了催化剂合成过程中各工艺参数对其催化性能的影响,结果表明,催化剂最佳的制备条件为:铜铬摩尔比1:1、沉淀和老化温度40℃、沉淀反应时间3h、老化时间3h、干燥温度120℃、干燥时间13h、焙烧温度340℃,在该条件下制备的铜铬催化剂连续运转150h后甲醇时空产率仍然能达到98g/(L·h),具有较高的催化活性和稳定性。

A series of Cu-Cr catalysts were prepared by complex precipitation process for methanol synthesis under low temperature and in liquid phase. The influences of the preparation parameters on the catalytic performance were studied. Results showed that catalyst prepared under the optimal conditions of a Cu/Cr molar ratio of 1, an aging and precipitation temperature of 40 ℃, a precipitation and reaction time of 3 h, an aging time of 3 h, a drying temperature of 120 ℃, a drying time of 13 h and a calcination temperature of 340 ℃ exhibited good catalytic activity and stability having a methanol space time yield of 98 g/（L· h） after running 150 h.