Nd -P -O催化剂上甘油脱水生产丙烯醛反应性能

分别以磷酸、焦磷酸和三聚磷酸为磷源制备了稀土磷氧类化合物,并以甘油脱水生产丙烯醛反应为模型反应,对该类化合物催化性能进行比较.研究反应温度、载气流速、反应空速和反应溶液浓度对催化剂性能的影响,得到最佳反应条件:反应温度320℃,载气流速30 mL · min-1,甘油空速227 h-1,甘油水溶液浓度36.5％,此条件...

Catalytic performance of Nd-P-O catalysts for vapor-phase dehydration of glycerol to acrolein

Nd-P-O catalysts were prepared by precipitation method using phosphate, pyrophosphate and tripolyphosphate as the phosphorus source, and their catalytic performance was compared using vapor- phase dehydration of glycerol to acrolein as the model reaction. The effects of reaction temperature, flow rate of carrier gas, space velocity, and concentration of glycerol aqueous solution on the catalytic perform- ance of the catalyst were investigated. Glycerol conversion of 96.4% and the selectivity to acrolein of 82.7% were attained tmder the optimal condition as follows：reaction temperature 320 ℃, flow rate of cartier gas 30 mL · min^-1 ,glycerol space velocity 227 h^-1 ,and concentration of glycerol aqueous solution 36.5%.