正癸烷在不同酸性Y型分子筛催化剂作用下生成C_4烃的规律研究  

CATALYTIC CRACKING OF n-DECANE TO C_4 HYDROCARBONS ON DIFFERENT ACIDITY Y ZEOLITE CATALYSTS

作　　者：耿秋月 袁帅[1] 严加松[1] 陈惠 Geng Qiuyue;Yuan Shuai;Yan Jiasong;Chen Hui(SINOPEC Research Institute of Petroleum Processing,Beijing 100083)

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《石油炼制与化工》2019年第1期8-12,共5页Petroleum Processing and Petrochemicals

摘　　要：采用USY,REHY,REY分子筛作为活性组分,经喷雾干燥制备了USY,REHY,REY分子筛催化剂;以正癸烷为模型化合物,在小型流化床装置上考察反应温度、剂油比、催化剂酸量对C_4烃产物选择性的影响。结果表明:3种催化剂作用下,在剂油质量比为6、反应时间为75s的条件下,随着反应温度从460℃升高到540℃,异丁烷选择性下降2百分点左右,正丁烷和异丁烯选择性上升1百分点左右,正丁烯选择性增加2～3百分点;在反应温度为500℃,反应时间分别为150s(剂油质量比3)、75s(剂油质量比6)、50s(剂油质量比9)的条件下,随着剂油质量比从3增大到9,C_4烃产物选择性基本不变;相同条件下,增加催化剂酸量有利于增加正丁烷和异丁烷选择性,降低正丁烯和异丁烯选择性。The catalysts containing USY,REHY,REY zeolite were prepared by spray drying method.The effects of reaction temperature,catalyst/oil mass ratio and catalyst acid content on the production of C4hydrocarbons were investigated by catalytic cracking of n-decane in a small fluidized bed.At the reaction conditions of a catalyst oil mass ratio of6,a reaction time of75s,the selectivity of isobutane decreases by2percentage points,while the selectivities of n-butane and isobutene increase by1percentage points,but the selectivity of n-butene increases by2-3percentage points as the reaction temperature increases from460℃to540℃.The selectivity of C4hydrocarbon products is basically unchanged at reaction temperature of500℃in the range of catalyst oil mass ratio from3to9.Increasing the acid content of catalyst can increase the selectivity of n-butane and isobutane and decrease the selectivity of butene and isobutene.

关 键 词：正癸烷 Y分子筛 催化裂化 C4烃 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]