CaO/Al2O3复合催化剂催化裂解大豆油制备烃类燃料的研究

CATALYTIC PERFORMANCES OF CaO/Al_2O_3 COMPOSITE IN CATALYTIC CRACKING OF SOYBEAN OIL FOR HYDROCARBON FUEL

以物理混合法制备复合催化剂CaO/Al_2O_3,采用单因素实验法,在固定床反应器以大豆油为原料进行CaO/Al_2O_3复合催化剂催化裂解大豆油制备烃类燃料的研究,考察裂解温度、空速、m(CaO)/m(Al_2O_3)对裂解产物的影响。结果表明:在裂解温度为510℃、质量空速为10.00h^(-1)、m(CaO)/m(Al_2O_3)为2∶8的条件下,裂解液收率为71.00%;裂解油组成中烃类质量分数高达80.96%,裂解油的运动黏度(20℃)为3.1 mm^2/s,酸值为4.1 mg KOH/g,氧质量分数为2.37%,热值达44.79kJ/g。

The physical mixing catalyst CaO/Al2O3 was applied in soybean oil by catalytic pyrolysis for hydrocarbon fuel production.The single factor experimental method was used to investigate the effect of cracking temperature,mass space velocity,m(CaO)/m(Al2O3)on cracking products in a fixed bed reactor.The results indicated that the optimum reaction conditions are cracking temperature of 510℃,space velocity of 10.00 h-1,and m(CaO)/m(Al2O3)of 2∶8.Under the optimal conditions,the liquid yield reaches 71.00%.The content of hydrocarbon in pyrolysis oil is over 80.96%with kinetic viscosity(20℃)of 3.1 mm 2/s,the acid value of 4.1 mgKOH/g,and the oxygen content of 2.37%,resulting in calorific value of 44.79 kJ/g.