加氢改质页岩油催化裂化工艺研究
STUDY ON CATALYTIC CRACKING PROCESS OF HYDROTREATED SHALE OIL
唐津莲 1梁家林 1龚剑洪 1袁起民1
作者信息
- 1. 中石化石油化工科学研究院有限公司,北京 100083
- 折叠
摘要
为实现页岩油的高效利用,通过加氢改质脱除页岩油中含氮化合物等杂质,采用小型固定流化床(FFB)装置,分别使用富含Y分子筛的SCG催化剂与富含ZRP型分子筛的DCC催化剂,考察催化剂与反应苛刻度对加氢改质页岩油催化裂化的影响.结果表明:脱氮率高达99.74％的加氢改质页岩油催化裂化的转化率高达79％～85％,液体产品收率高达89％～94％;使用SCG催化剂时的汽油收率高,在反应温度为500 ℃、剂油质量比为6.0的条件下,收率高达51.77％,研究法辛烷值(RON)在90以上,且汽油收率随着转化率提高呈线性下降;使用DCC催化剂时的液化气(LPG)收率与三烯(乙烯+丙烯+丁烯)收率更高,在反应温度为560 ℃、剂油质量比为10.3的条件下二者分别高达41.62％和32.90％,且二者均随着转化率提高而大幅度增加.两种催化剂上汽油中烯烃含量均随着转化率提高而线性降低,RON线性提高.
Abstract
To achieve efficient utilization of shale oil,nitrogenous compounds and other impurities in shale oil were removed by hydrotreating.The catalytic cracking of hydrotreated shale oil was investigated by using a small-scale fixed fluidized bed(FFB)unit.The effects of catalyst and reaction severity were studied by using SCG catalyst enriched with Y molecular sieves and DCC catalyst enriched with ZRP-type molecular sieves,respectively.The experimental results showed that catalytic cracking of hydrotreated shale oil,with nitrogen removal of 99.74％,achieved a high conversion rate ranging from 79％to 85％.The yield of liquid product was also high,ranging from 89％to 94％.The highest yield of gasoline was achieved by using the SCG catalyst,with the yield of 51.77％and research octane number(RON)of over 90 at a reaction temperature of 500 ℃ and a catalyst/oil mass ratio of 6.The data indicated that an increase in the conversion rate of hydrotreated shale oil resulted a linear decrease of gasoline yield.Furthemore,the utilization of the DCC catalyst led to higher yields of liquefied petroleum gas(LPG)and light olefins(ethylene+propylene+butene),reaching up to 41.62％and 32.90％,respectively,at a reaction temperature of 560 ℃ and a catalyst/oil mass ratio of 10.3.The LPG and light olefins yield increased significantly with the increase of conversion.The olefin content of gasoline decreased linearly with the increase of conversion on both catalysts,while the RON increased linearly.The two processing schemes for producing more gasoline and LPG from the cracking of hydrotreated shale oil were designed.
关键词
页岩油/加氢改质/催化裂化/催化剂/汽油/液化气Key words
shale oil/hydro-upgrading/catalytic cracking/catalyst/gasoline/LPG引用本文复制引用
基金项目
国家十四·五重点研发计划项目(2022YFB3805402)
出版年
2024
NETL
NSTL
万方数据