大孔磺酸树脂催化FCC汽油烷基化脱硫降烯烃性能的研究

Catalytic performance of macroporous sulfonic resins in alkylation desulfurization and olefins reduction of FCC gasoline

针对大孔磺酸树脂催化FCC汽油组分烷基化脱硫和降烯烃的问题,研究了FCC汽油内部关键组分之间的反应规律。结果表明,NKC-9、D005-Ⅱ、Amberlyst 35和Amberlyst 36 4种大孔磺酸树脂中Amberlyst 36的催化效果最好,最佳反应温度是90℃。在Amberlyst 36催化下,与含硫化合物反应时,烯烃的活性顺序是:异戊烯>2,3-二甲基-2-丁烯>2,3-二甲基-1-丁烯>2-戊烯>1-戊烯>1-己烯。含硫化合物中硫醇反应活性最高,3-甲基噻吩反应活性大于噻吩。Amberlyst 36催化下,异戊烯、2,3-二甲基-2-丁烯和2-戊烯可以与异戊烷发生烷基化反应,降烯烃效果明显。而1-戊烯、2,3-二甲基-1-丁烯和1-己烯主要是发生自身异构化反应。

Experiments are performed to study the law of reactions among key components in FCC gasoline,which is aiming at solve the problems in alkylation desulfurization and olefins reduction of FCC gasoline catalyzed over macroporous sulfonic resins.Experiment results show that Amberlyst 36 exhibits the best catalysis efficiency among NKC-9,D005-Ⅱ,Amberlyst 35 and Amberlyst 36,and the best reaction temperature is at 90℃.The reaction activity of olefins ranks from high to low as follows: isoamylene,2,3-dimethyl-2-butene,2,3-dimethyl-1-butylene,2-pentene,1-pentene and1-hexene when they react with sulfur-containing compounds through catalysis of Amberlyst 36. The reaction activity sequence of sulfur-containing compounds is propanethiol>3-methylthiophene>thiophene.Under the catalysis of Amberlyst36,isoamylene,2-pentene and 2,3-dimethyl-2-butene can perform alkylation reaction with isoamyl,bringing about a significant effect to reduce olefin.However,1-pentene,2,3-dimethyl-1-butene or 1-hexene cannot perform such alkylation reaction,but occurs mainly isomerization reaction themselves.