FCC汽油在Zn-P/HZSM-5催化剂上的芳构化研究

Study on aromatization of FCC gasoline in Zn-P/HZSM -5 catalyst

制备了w(ZnO)为2%,w(P2O5)为4%的Zn-P/HZSM-5芳构化催化剂。以75～120℃的FCC汽油馏分为原料,在小型固定床反应器上考察了工艺条件对该汽油馏分芳构化反应的影响,并且对再生催化剂的性能进行了表征。结果表明,在反应温度为450℃,反应压力为0.1MPa,液体空速为1.0h-1的最佳反应条件下,原料中烯烃和烷烃的转化率分别达到93.77%和88.94%,液相产品中烯烃及芳烃的质量分数分别为6.80%和74.57%;再生催化剂的活性与新鲜催化剂基本一致,表明该催化剂主要是由于积碳而导致失活。

A kind of catalyst by Zinc and phosphorus incorporated HZSM - 5 was prepared. The mass fraction of ZnO and P2O5 was 2% and 4% respectively. The process conditions on aromatization reaction and the coke deactivation mechanism of ZnP/HZSM - 5 catalyst were studied on a small -scale fixed bed reactor using FCC naphtha (75 - 120℃) . The results showed that ZnP/HZSM - 5 catalyst when reaction temperature was 450℃. , liquid space velocity was 1.0 h-1 , and reaction pressure was 0. 1 MPa,the degree of conversion of olefins and alkanes were 93. 77% and 88.94% respectively , the contents of olefins, the mass fractions of olefins and alkanes in liquid product were 6. 80% and 74. 57% respectively. Carbon deposition was the major reason of catalyst deactivation due to the catalyst kept good performance as fresh catalyst after regeneration.