ZRP沸石对FCC汽油催化裂解产丙烯的影响  

THE EFFECTS OF ZRP ZEOLITES ON FCC GASOLINE CATALYTIC CRACKING FOR PROPYLENE

作　　者：邵潜[1] 李阳[1] 田辉平[1] 贺振富[1] 龙军[1] 

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《石油学报（石油加工）》2007年第2期8-11,共4页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：国家重点基础研究发展规划‘973’项目(2004CB719505)资助

摘　　要：研究了在550℃、常压、加入水蒸气条件下,FCC汽油在ZRP沸石上的催化裂解反应和ZRP沸石硅/铝比(n(SiO2)/n(Al2O3))变化及稀土改性ZRP对反应的影响。实验结果和反应前后反应物与产物分布的计算结果表明,FCC汽油中烯烃进行裂化反应生成丙烯。提高烯烃的选择性转化、促进裂化反应并提高丙烯产物的选择性,有利于提高丙烯产率。提高ZRP沸石的n(SiO2)/n(Al2O3)能够增加其强酸量,使烯烃的转化率和低碳烯烃的选择性有所提高,但丁烯选择性高于丙烯的选择性。采用稀土改性也可使ZRP沸石增加强酸量,提高烯烃的转化率和丙烯的选择性,使74.32%的烯烃被转化,裂解汽油烯烃质量分数为18.20%,丙烯选择性达到45.91%。The catalytic cracking reaction of FCC gasoline over ZRP zeolites under 550℃,atmospheric pressure and with steam for production of n（Al2O3） and the modification of ZRP by rare earth investigated.. The experimental results and calculated showed that the propylene was obtained by the crack Increasing propylene the conversion of olefin, promoting the crackin would be in favor of increasing the yield of propylene, and the effects of n （SiO2）/ n（Al2O3） and the modification of ZRP by rare earth elements on the cracking reaction were distribution of reactants and products ing reaction of olefin in FCC gasoline. g reaction and increasing the selectivity of propylene. The ZRP zeolite with highn（SiO2）/n（Al2O3） possessed more strong acid so that the conversion of olefin and the selectivity of light olefin were both increased. But the selectivity of butylene was higher than that of propylene. The ZRP zeolite modified with rare earth also possessed more strong acid, over which in cracking reaction of FCC gasoline, not only increased the conversion of olefin, but also the selectivity of propylene increased, resulting in the olefin conversion of 74.32%, the olefin mass fraction of 18.20% in cracking gasoline and the propylene selectivity of 45.91%.

关 键 词：FCC汽油 烯烃 催化裂解 ZRP沸石 稀土 丙烯 

分 类 号：TE624.9[石油与天然气工程—油气加工工程]