反应压力对HZSM-5催化正癸烷裂解反应性能影响  

The effect of reaction pressure on the catalytic performance of HZSM-5 for n-decane catalytic cracking

作　　者：张耀远 吕扬平 张锟 贾淑君 吴芹 史大昕 陈康成 黎汉生 Zhang Yaoyuan;Lv Yangping;Zhang Kun;Jia Shujun;Wu Qin;Shi Daxin;Chen Kangcheng;Li Hansheng(School of Chemistry and Chemical Engineering,Beijing Institute of Technology,Beijing 100081,China;China North Vehicle Research Institute,Beijing 100072,China)

机构地区：[1]北京理工大学化学与化工学院,北京100081 [2]中国北方车辆研究所,北京100072

出　　处：《工业催化》2024年第6期62-69,共8页Industrial Catalysis

基　　金：国家自然科学基金(22108013);中国石油天然气股份有限公司科技开发项目(2023ZZ36);重质油全国重点实验室开放基金资助项目;北京理工大学青年教师学术启动计划。

摘　　要：以HZSM-5分子筛为原料,制备具有微米及纳米尺寸的HZSM-5/MCM-41微孔-介孔复合分子筛催化剂。通过调节反应压力,探究催化剂在不同反应条件下对正癸烷催化裂解反应的影响。结果表明,在低压条件下,反应流体密度随系统压力升高而增大,有利于低碳烯烃芳构化,从而使得低碳烯烃选择性降低;当压力进一步增至高压时,主要裂解产物均位于近临界或超临界状态,进而降低低碳烯烃芳构化程度,提高低碳烷烃含量。In this paper,microporous-mesoporous HZSM-5/MCM-41 composites with micro and nano-sized were prepared using HZSM-5 as raw material.The effects of the reaction pressure on the conversion and products selectivity in n-decane catalytic cracking reaction were investigated.It is found that when the system pressure is low,the density of the reaction fluid increases with the increase of the system pressure,promoting the aromatization of light olefins into aromatics and decreasing the selectivity of light olefins.When the pressure further increases,most of the cracking products are in a near critical or supercritical state,which reduces the aromatization degree of light olefins and increases light alkanes content.

关 键 词：有机化学工程 催化裂解 正癸烷 低碳烯烃 芳烃 超临界状态 

分 类 号：TQ426.94[化学工程] TQ221.21