负载型磷钨酸对柴油催化氧化脱硫

采用过量浸渍法和吸附法把磷钨酸(PW12)负载在TiO2、改性Y分子筛(GY)、AC载体上,并用负载后的催化剂对柴油(含硫量540 mg.L-1)进行催化氧化脱硫,结果表明,3种催化活性强弱顺序为:GY>TiO2>AC,且当GY上负载PW12的质量分数为30%的PW12/GY催化脱硫效果最好。对催化剂进行了酸强度测

The Oxidative Desulfurization of Diesel Oil Catalyzed by Supported Phosphotungstic Acid

The three catalysts were prepared by supporting phosphotungstic acid on TiO_2,modified zeolite Y and activated carbon (AC) through the wetness impregnation method and the adsorption method.The catalysts were tested for of diesel with 540 ppm sulfur.The results show that GY has the best catalytic activity,and next is TiO_2,AC.30% PW_(12)/GY shows best catalytic activity in oxidation desulfurization.Three catalysts characterized by acid strength and specific surface area and modified zeolite Y was characterized by XRD.The catalytic activity and stability of PW_(12)/GY were studied in the oxidative desulfurization,the results show the 30% PW_(12)/GY is near extra-Acidic,the surface narea is 462m~2·g~(-1).The desulfurization rate is 95.3% on the most suitable reaction conditions of oxidative desulfurization:20 mL oil,0.08 g catalyst,the molar ratio for hydrogen peroxide:sulfur=7,reaction temperature 343 K,reaction time 70min,and V_((NMP)):V_((oil))=1:1 with three extraction cycles.