提高催化重整反应选择性的反应路径设计与研究  

Designing and Study on the Reaction Routes to Improve Selectivity of Catalytic Reforming

作　　者：王嘉欣[1] 马爱增[1] 于宁[1] WANG Jiaxin;MA Aizeng;YU Ning(Research Institute of Petroleum Processing, SINOPEC, Beijing 100083, China)

机构地区：[1]中国石化石油化工科学研究院,北京100083

出　　处：《石油学报（石油加工）》2021年第6期1267-1276,共10页Acta Petrolei Sinica(Petroleum Processing Section)

基　　金：中国石油化工股份有限公司项目(S110021)基金资助。

摘　　要：基于分子模拟对正庚烷脱氢环化过程中的决速步骤反应能垒进行理论分析,提出降低决速步骤反应能垒的可行途径,设计出通过增强双分子氢负离子转移反应提高重整反应选择性的反应路径。根据此反应思路,制备了含硼硅分子筛的催化剂,考察了不同模型化合物的催化重整反应性能。结果表明,与含硼硅β分子筛的催化剂和氧化铝重整催化剂单独使用相比,将2种催化剂机械混合后使用可以获得更高的芳烃产率和更低的气体产率。以1-己烯、环己烷和正庚烷为模型化合物的催化重整反应验证了混合催化剂具有更高氢转移活性。该新反应路径对半再生重整和连续再生重整催化剂均具有适用性。A feasible reaction path was proposed to decrease the activation energy barrier of the rate-limiting step by molecular simulations for dehydrocyclization of heptane,and a reaction route through bimolecularhydride transfer to improve the selectivity of catalytic reforming reaction was designed accordingly.Subsequently,catalysts containing borosilicateβzeolite were prepared to investigate catalysis reforming performance by different model compounds.The results show that borosilicateβzeolite and alumina mixtures have higher aromatics yield and lower gas yield than the individuals.Taken n-heptane,1-hexene and cyclohexane as the model compounds,the results show that catalyst mixtures has higher hydride transfer reactivity.The proposed new reaction route is available for both semi-regenerative reforming catalyst and continuous regeneration catalyst.

关 键 词：催化重整 硼硅分子筛 混合催化剂 酸性中心 氢转移 

分 类 号：TE624[石油与天然气工程—油气加工工程] TQ426.95[化学工程]