氧化铝-氧化锆复合载体制备碳二前加氢催化剂的性能评价

Performance evaluation of C_2 front-end hydrogenation catalyst supported on Al_2O_3-ZrO_2 composite carrier

利用氧化铝（Al2O3）-氧化锆（Zr O2）复合载体,采用等体积分布浸渍法制备碳二（C2）前加氢催化剂,对其孔结构及表面酸性进行了表征,并在实验室100 m L C2加氢反应器上评价其加氢性能。结果表明,所制备催化剂呈特定双峰孔径分布,孔径分布在80~150 nm,160~400 nm,相应的最可几孔径分别为110,280 nm;表面总酸量为22.023 mmol/g;在反应器入口温度为68℃的条件下运行500 h,与同类型进口催化剂相比,所制备催化剂床层温升降低了4℃,乙炔转化率、乙烯选择性、丙炔及丙二烯（MAPD）转化率分别高出4.2,2.0,1.0个百分点,MAPD选择性降低了2.0个百分点,绿油及焦炭生成量均较低。

Using alumina （ Al2O3 ） - zirconia （ ZrO2 ） composite carrier, the C2 front - end hydrogenation catalyst was prepared by isovolume impregnation method. The pore structure and surface acidity of the catalyst were characterized, and the hydrogenation performance of the catalyst was evaluated in a 100 mL C2 hydrogenation reactor. The results showed that the home -made catalyst had the characteristics of bimodal pore size distribution, which ranged between 80 - 150 nm and 160 - 400 nm, and their most probable pore sizes were 110 nm and 280 nm respectively;the total acidity of the catalysts was 22. 023 mmol/g Through operating at 68 ℃ of inlet temperature for 500 h, compared to the same type of imported catalysts,the bed temperature rise of the home - made catalyst decreased by 4 ℃ , the conversion of acetylene, the selectivity of ethylene, and the conversion of propyne plus propadiene （ MAPD ） increased by 4.2,2. 0 and 1.0 percent points respectively, the selectivity of MAPD decreased by 2.0 percent points, and the yields of green oil and coke were lower.