加氢LCO催化裂化反应过程中芳烃转化规律分析  

STUDY OF AROMATICS CONVERSION RULES IN HYDROTREATED LCO CATALYTIC CRACKING

作　　者：陈骞 毛安国[1] 袁起民[1] 达志坚[1] Chen Qian;Mao Anguo;Yuan Qimin;Da Zhijian(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》2021年第8期42-48,共7页Petroleum Processing and Petrochemicals

基　　金：国家重点研发计划资助项目(2017YFB0306500);中国石油化工股份有限公司重大科技项目(ZD117000)。

摘　　要：基于催化裂化轻循环油(LCO)选择性加氢-催化裂化集成生产轻质芳烃(LTA)技术在中国石化某分公司的工业应用结果,从烃类分子水平对加氢LCO催化裂化反应过程中芳烃转化规律进行分析。结果表明:加氢LCO发生催化裂化反应后,分子膨胀比为2.11,其中链状烃含量增加,环烷烃含量降低,单环芳烃含量降低,稠环芳烃含量增加;催化裂化产物中的单环芳烃73.91%来自加氢LCO中单环芳烃上烷基和环烃基的裂化、轻质化反应,其余来自加氢LCO中非芳烃类化合物的环化和芳构化反应;催化裂化产物中双环、三环及三环以上芳烃(包括焦炭)来自加氢LCO中双环、三环芳烃的比例分别为37.77%和18.49%,其余分别来自加氢LCO中单环、双环芳烃的稠环化反应;加氢LCO中烷基苯、茚满类+四氢萘类和茚类的催化裂化表观转化率分别为82.50%,93.80%,80.72%。研究结果对LTA工艺技术的改进和专用催化剂的性能提升具有指导作用。Based on the commercial result of LTA technology in a refinery of SINOPEC,the conversion rules of the aromatics in hydrotreated LCO(hydro-LCO)catalytic cracking were studied in terms of molecular-based hydrocarbon.The results showed that 73.91%of monocyclic aromatics in products was from cracking reaction of the monocyclic aromatics like alkyl-benzene and naphthenic-benzene in hydro-LCO,and the rest was from the aromatization reactions of non-aromatic compounds including paraffin hydrocarbons and naphthenic hydrocarbons in hydro-LCO in the catalytic cracking process.The contents of dicyclic-aromatics and tricyclic and polycyclic aromatics in products were 37.77% and 18.49%,respectively,and the rests were made up from condensation reactions of monocyclic aromatics and dicyclic aromatics in hydro-LCO.The apparent conversions of alkyl-benzene,hydrocarbons like indane and tetraline and hydrocarbons like indene in catalytic cracking processing were 82.50%,93.80% and 80.72%,respectively.The results can be used to guide the further improvement of LTA technology and proprietary catalyst.

关 键 词：轻循环油 加氢处理 催化裂化 LTA 芳烃 

分 类 号：TE624.41[石油与天然气工程—油气加工工程]