加氢蜡油性质特征对其催化裂解丙烯收率的影响  

EFFECT OF HYDROTREATED GAS OIL PROPERTIES ON THE PROPYLENE YIELD IN DEEP CATALYTIC CRACKING PROCESS

作　　者：梁家林 张璠玢 任亮 李福超 马苏甜 胡志海 Liang Jialin;Zhang Fanbin;Ren Liang;Li Fuchao;Ma Sutian;Hu Zhihai(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》2023年第3期14-19,共6页Petroleum Processing and Petrochemicals

摘　　要：将沙轻减压蜡油(LVGO)、沙重减压深拔蜡油(HVGO)以及减压蜡油掺脱沥青油(DAO,质量分数为50%)的混合蜡油3种原料分别加氢得到不同氢含量的加氢蜡油,再以加氢蜡油为原料进行催化裂解,探讨不同加氢蜡油性质对催化裂解丙烯收率的影响。HVGO加氢蜡油的催化裂解结果表明,加氢蜡油氢含量和芳碳率与催化裂解丙烯收率的相关性较高。3种氢含量相近加氢蜡油的催化裂解结果表明,掺DAO的混合蜡油加氢产物催化裂解的丙烯收率最高,其次是HVGO,最低的是LVGO。掺DAO的混合蜡油加氢产物中高碳数烃类占比显著高于其他两种加氢蜡油,表明加氢蜡油的碳数分布是影响催化裂解丙烯收率的关键因素之一。对比渣油溶剂脱沥青+蜡油加氢组合工艺与渣油固定床加氢工艺,前者具有更低的投资、更长的运转周期和更优质的加氢产物性质,更适宜作为催化裂解装置原料的生产路线,但能耗高于后者。Three kinds of feedstock,including Arabian light VGO,Arabian heavy VGO and VGO blending with deasphalted oil(DAO),were respectively hydrotreated to obtain hydrotreated gas oil with different hydrogen content,and the deep catalytic cracking(DCC)experiments were carried out to study the effects of different properties of hydrotreated gas oil on the yield of propylene.The results of DCC tests with different hydrogen content of the hydrotreated gas oil obtained from the Arabian heavy VGO deep-drawn gas oils showed that the hydrogen content and the aromatic carbon ratio were the key factor on the propylene yield of catalytic cracking.The results of DCC tests with three kinds of hydrotreated gas oils showed that the yield of propylene was the highest when the mixture of gas oil with DAO was hydrotreated,the second was HVGO,the lowest was LVGO.The proportion of high carbon number hydrocarbons in the hydrotreated gas oil of the VGO blending DAO was significantly higher than that of the other two materials,indicating that the carbon number of the hydrotreated gas oil was one of the key factors affecting the yield of propylene in DCC process.Compared with the combined process of solvent deasphalting+VGO hydrotreating and residue fixed bed hydrotreating process,the former had lower investment,longer operation period and better product properties,it was more suitable to be used as feedstock of catalytic cracking unit,but its energy consumption was higher than the latter.

关 键 词：蜡油加氢 溶剂脱沥青 催化裂解 碳数分布 丙烯收率 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]