加氢直馏柴油的催化裂化工艺研究  

STUDY ON CATALYTIC CRACKING PROCESS OF HYDROGENATED STRAIGHT-RUN DIESEL

作　　者：刘文明 唐津莲 袁起民 张锐 陈学峰 Liu Wenming;Tang Jinlian;Yuan Qimin;Zhang Rui;Chen Xuefeng(SINOPEC Research Institute of Petroleum Processing Co.,Ltd.,Beijing 100083)

机构地区：[1]中石化石油化工科学研究院有限公司,北京100083

出　　处：《石油炼制与化工》2024年第8期26-31,共6页Petroleum Processing and Petrochemicals

基　　金：国家重点研发计划项目(2022YFA1504400);中国石油化工股份有限公司合同项目(124071)。

摘　　要：采用小型固定流化床装置考察反应苛刻度与催化剂类型对加氢改质直馏柴油(加氢直柴)催化裂化的影响,设计了加氢直柴催化裂化多产液化气(LPG)与多产汽油两种方案。结果表明:加氢直柴在富含Y分子筛和富含ZSM-5分子筛的不同催化剂上进行催化裂化反应,在反应温度520~600℃、剂油质量比6~10等不同反应条件下,其转化率均高于75%;随着转化率提高,LPG收率提高,汽油收率下降,汽油的研究法辛烷值(RON)升高;在加氢直柴多产LPG模式下,宜采用ZSM-5分子筛催化剂,当反应温度为600℃、剂油质量比为9.96时,LPG收率高达36.48%且丙烯收率为16.33%,三烯收率为34.49%;在加氢直柴多产汽油模式下,宜采用Y分子筛催化剂,当反应温度为520℃、剂油质量比为6.05时,汽油收率高达60.22%,RON为94.1;在原油价格为80美元/bbl(1 bbl=159 L)时,两种模式下吨油利润分别为329.5元和296.9元。The effects of reaction severity and catalyst type on catalytic cracking of hydrogenated straight-run diesel were investigated in a small fixed fluidized bed unit.Two processing schemes were designed to produce more liquefied petroleum gas(LPG)and gasoline from catalytic cracking of hydrogenated straight-run diesel.The experimental results showed that conversion rates exceeded 75%on the different catalysts rich in Y-type zeolite and ZSM-5 zeolite under different reaction conditions,such as reaction temperature of 520-600℃and catalyst/oil mass ratio of 6.0-10.0.With the increase of conversion rate,the yield of LPG increased,the yield of gasoline decreased and the research octane number(RON)increased.To produce more LPG,it’s suitable for using ZSM-5 zeolite catalyst at the temperature of 600℃and catalyst/oil mass ratio of 9.96,the yields of LPG and propylene were 36.48%and 16.33%,respectively.Besides,the total yield of ethylene,propylene and butylene was 34.49%.To produce more gasoline,it’s suitable for using Y-type zeolite catalyst at the temperature of 520℃and catalyst/oil mass ratio of 6.05,the yield of gasoline was 60.22%and the RON was 94.1.Under the crude oil price system of 80$/bbl(1 bbl=159 L),the per ton oil profits of the two processing schemes were 329.5 Yuan and 296.9 Yuan,respectively.

关 键 词：直馏柴油 催化裂化 催化剂 转化率 丙烯 液化气 汽油 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]