多级孔ZSM-5分子筛在增产丙烯助剂中的应用  

APPLICATION OF HIERARCHICAL ZEOLITE ZSM-5 IN ADDITIVE FOR INCREASING PROPYLENE PRODUCTION

作　　者：孙敏 沈宁元 黄志青 欧阳颖 宋海涛 Sun Min;Shen Ningyuan;Huang Zhiqing;Ouyang Ying;Song Haitao(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8期58-66,共9页Petroleum Processing and Petrochemicals

摘　　要：研究了多级孔ZSM-5分子筛(MZSM-5)与常规ZSM-5分子筛的不同,并考察了其在增产丙烯助剂中的应用效果。结果表明:MZSM-5具有更多的二次孔,介孔率高,有利于大分子的扩散和裂化;与以常规ZSM-5分子筛为活性组元的助剂MP-0相比,在转化率基本相当的情况下,在以MZSM-5为活性组元的助剂MP-1作用下,产物液化气收率更高,柴油和油浆收率更低,丙烯收率和液化气中丙烯含量更高。MP-1助剂的加入可使汽油中的部分烯烃和异构烷烃转化为丙烯,同时可使部分柴油转化为汽油组分,从而减小汽油收率的下降幅度,提高丙烯选择性。工业应用结果表明,与不加助剂时相比,在助剂添加量(w)仅为系统藏量的2%时,液化气收率增加1.38百分点,液化气中丙烯体积分数增加1.48百分点,产品分布明显改善。The differences between the hierarchical zeolite ZSM-5 and the conventional zeolite ZSM-5 were studied,and its application effect in propylene additives was investigated.The research results showed that the hierarchical zeolite MZSM-5 had more secondary pores and high mesoporosity,which was beneficial to the diffusion and cracking of macromolecules.Compared with MP-0 which used the conventional zeolite ZSM-5 as active component,MP-1 with hierarchical zeolite MZSM-5 was used as active component,the yield of LPG was higher,the yield of diesel oil and slurry oil were lower,and propylene yields and propylene content in LPG were higher under the same conversion.The addition of MP-1 additive could convert some olefins and isoparaffins of gasoline into propylene,and some diesel into gasoline components,thus slowing down the decline of gasoline yield and improving propylene selectivity.The results of industrial application showed that the yield of LPG and the volume fraction of propylene in LPG increased by 1.38 percentage points and 1.48 percentage points,respectively,when the additive proportion was only 2%of the system storage.Compared with that when no additive was added,product distribution had improved significantly.

关 键 词：催化裂化 多级孔ZSM-5 液化气 丙烯 助剂 

分 类 号：TQ221.212[化学工程—有机化工] TQ426