为进一步提高燃油氧化脱硫(ODS)的脱硫效率、改善催化剂回收困难问题,以350 nm单分散聚苯乙烯微球(PS)为模板,采用溶胶-凝胶法制备得到一系列掺铝有序大孔HPW/TiO₂-20催化剂,并研究了其结构和脱硫性能。结果表明,掺铝0.025%的有序大孔4-HPW/TiO₂-20催化剂催化氧化脱硫性能最佳,其大孔孔径约230 nm,比表面积为78.3 m²/g,总孔体积为0.19 cm³/g,另外,该催化剂存在平均孔径为2.8 nm的烧结孔。该催化剂在温度60℃、质量为0.15 g、氧硫比为4时,反应 1 h对模拟燃油中二苯并噻吩(DBT)的催化氧化转化率达100%,循环使用8次后脱硫效率仍达96.5%。

In order to further improve the desulfurization efficiency of oxidation desulfurization technology (ODS) for fuel oil and overcome the difficulty in catalyst recovery,a series of ordered macro-porous HPW/TiO₂-20 catalysts doped with aluminum are prepared through sol-gel method by using 350 nm monodisperse polystyrene microspheres as templates,and their structures and properties are studied.The results show that the ordered macro-porous 4-HPW/TiO₂-20 catalyst doped with 0.025 wt.% of aluminum has the best catalytic oxidation desulfurization performance,with a macro-porous pore size of about 230 nm,a specific surface area of 78.3 m²·g^-1 and a total pore volume of 0.19 cm³·g^-1.In addition,the catalyst has some sintered pores with an average pore size of 2.8 nm.The conversion rate of dibenzothiophene in simulated fuel oil reaches 100% when the catalyst is served at 60℃,the dosage is 0.15 g,the oxygen-sulfur ratio is 4,and the reaction lasts for 1 h.The desulfurization efficiency still reaches 96.5% after the catalyst has been recycled for 8 times.

陈学兵(1983-),男,硕士,工程师,研究方向为多孔纳米材料研究,289248497@qq.com。