石脑油裂解性能评价及含硫化合物的转化  

Evaluation of naphtha cracking performance and conversion of sulfur compounds

作　　者：曾兴业[1] 陈婵 林海 单书峰 吴世逵[1] Zeng Xingye;Chen Chan;Lin Hai;Shan Shufeng;Wu Shikui(Key Laboratory of Inferior Crude Oil Processing of Guangdong Provincial Higher Education Institutes,Guangdong University of Petrochemical Technology,Maoming Guangdong 525000,China;Technology Center of Zhanjiang Customs District,Zhanjiang Guangdong 524022,China)

机构地区：[1]广东石油化工学院劣质油加工广东省高校重点实验室,广东茂名525000 [2]湛江海关技术中心,广东湛江524022

出　　处：《石油化工》2022年第3期270-278,共9页Petrochemical Technology

基　　金：广东省基础与应用基础研究基金项目(2020A1515110729,2021A1515010278);广东省普通高校特色创新项目(2018KTSCX149);青年创新人才项目(2018KQNCX158);广东石油化工学院博士启动项目(2020bs002);海关总署科技计划项目(2020HK246)。

摘　　要：以加氢石脑油、高硫石脑油和轻质石脑油三种石脑油为原料,进行了全面的裂解原料性质指标分析;通过蒸汽裂解评价实验,考察了裂解炉管出口温度、出口压力、水油质量比以及石脑油性质对裂解主要产物收率的影响。实验结果表明,当裂解炉管出口温度为835℃、出口压力为70 kPa、水油质量比为0.60时,“双烯”(乙烯和丙烯)、“三烯”(乙烯、丙烯和丁二烯)和高附加值产物收率最大,分别为43.27%(w),47.35%(w),55.86%(w)。分析了三种石脑油及其裂解汽油中硫醇、硫醚和噻吩等几类主要硫化物的含量,并通过理论计算推测了CS_(2)的来源。实验结果表明,高硫石脑油中94.93%(w)的硫醇类化合物被裂解转化为H_(2)S、硫醚和噻吩类硫化物;裂解过程中甲烷、乙烯或丙烯与H_(2)S的反应是生成CS_(2)的潜在反应。Taking hydrogenated naphtha,high sulfur naphtha and light naphtha as raw materials,a comprehensive analysis of cracking feedstock properties was carried out.The effects of outlet temperature(COT)and pressure(COP)of cracking furnace tube,mass ratio of water to naphtha(W/O)and naphtha properties on the yield of main products were investigated by steam cracking evaluation experiment.The results showed that under the conditions of COT of 835℃,COP of 70 kPa and W/O of 0.6,the yields of“ethylene and propylene”,“ethylene,propylene and butadiene”and high value-added products were the highest,reached 43.27%(w),47.35%(w)and 55.86%(w),respectively.The contents of mercaptan,thioether and thiophene in three naphthas and their pyrolysis gasoline were analyzed,and the source of CS_(2) was speculated through theoretical calculation.The results showed that 94.93%(w)of mercaptan compounds in high sulfur naphtha were cracked and transformed into H_(2)S,thioether and thiophene.The reactions of H_(2)S with methane,ethylene or propylene in the cracking process were potential reactions for the formation of CS_(2).

关 键 词：石脑油 裂解原料 蒸汽裂解 高附加值产物 硫化物 

分 类 号：TQ221.21[化学工程—有机化工]