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通过比较正庚烷 (n C7)与正十四烷 (n C14 )的临氢异构化反应 ,探讨了正构烷烃在 0 4 %Pt/SAPO 11催化剂上临氢异构化的反应历程 .在低转化率下即产生裂解产物的实验结果支持质子环丙烷 (PCP)作用机理 ,提出了在一次反应中就生成裂解产物的观点 .通过分析n C7与n C14 临氢异构产物的分布 ,认为异构化过程主要发生在分子筛孔道内 .根据n C7与n C14呈现相同的反应规律 ,将加氢转化过程中链长超过C10 的烷烃的正碳离子反应的相对速率与链长无关的观点扩展到C7,并在传统反应历程的基础上提出了修正的烷烃异构化反应历程
The hydro-isomerization of n-alkanes over 0 4% Pt / SAPO 11 catalyst was investigated by comparing the hydroisomerization of n-heptane (n C7) with n-tetradecane (n C14). The experimental results of pyrolysis products at low conversion rate support the mechanism of proton cyclopropane (PCP) and put forward the viewpoint of producing pyrolysis products in one reaction. By analyzing the distribution of hydrogen isomers of n C7 and n C14, It is considered that the isomerization process takes place mainly in the molecular sieve pores.According to the same reaction law of n C7 and n C14, the relative rate of carbon-ion reaction of alkanes with chain lengths over C10 during hydroconversion is unrelated to the chain length Extended to C7, and based on the traditional reaction process proposed alkane isomerization reaction process