烯烃对5A分子筛吸附剂吸附分离性能的影响  

EFFECT OF OLEFINS ON ADSORPTION AND SEPARATION PERFORMANCE OF 5A ZEOLITE ADSORBENT

作　　者：刘伟强 王红超 杨彦强 乔晓菲 王辉国 Liu Weiqiang;Wang Hongchao;Yang Yanqiang;Qiao Xiaofei;Wang Huiguo(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11期34-40,共7页Petroleum Processing and Petrochemicals

摘　　要：通过动态脉冲试验和模拟移动床试验对5A分子筛吸附剂进行正异构烷烃分离性能研究,采用X射线衍射、扫描电子显微镜、N_(2)吸附-脱附等方法对5A分子筛吸附剂样品进行表征,考察样品中烯烃种类和含量对5A分子筛吸附剂分离性能的影响规律。脉冲试验结果表明,吸附进料中不同种类烯烃对5A分子筛吸附剂的分离性能影响程度不同,异构烯烃和环烯烃对5A分子筛吸附剂的分离性能影响较大,而正构烯烃对5A分子筛吸附剂的分离性能影响较小。模拟移动床试验结果表明,质量分数约2%的环己烯使正构烷烃收率下降5.6百分点。异构烯烃或环烯烃由于在5A分子筛表面上发生反应,堵塞了部分介孔孔道,导致5A分子筛吸附剂对正构烷烃的吸附脱附速率明显降低,分离性能明显变差。The separation performance of 5A zeolite adsorbent for normal and isomeric alkanes was evaluated by dynamic pulse experiment and simulated moving bed experiment.The 5A zeolite adsorbent samples were characterized by XRD,SEM,N_(2) physical adsorption,and the effects of the type and the content of olefin on the separation performance of 5A zeolite adsorbent were investigated.The results of dynamic pulse experiment showed that the olefins with different structures in the adsorbent had different effects on the separation performance of 5A zeolite adsorbent,and isomeric olefins or cyclic olefins had a greater impact on the separation performance of 5A zeolite adsorbent than that of normal olefins.The results of simulated moving bed experiment showed that the yield of n-alkanes was decreased by about 5.6 percentage points when the mass fraction of cyclohexenes was 2%.Due to the reaction of isomeric olefins or cyclic olefins on the surface of molecular sieve,some mesoporous pores were blocked,which resulted in the decrease of the adsorption rate of 5A zeolite adsorbent for n-alkanes and the deterioration of separation performance.

关 键 词：5A分子筛 吸附剂 烯烃 分离性能 模拟移动床 

分 类 号：TQ424[化学工程]