采用气相色谱-质谱法分析1-甲基萘/戊基苯、四氢萘两种反应体系的烷基萘含量,发现α位和β位烷基萘质量分数随着反应转化率的升高而增加,而且不同取代位烷基萘质量分数之比(烷基萘参数)可以反映反应体系转化率的高低.进一步研究发现,不同体系的烷基萘反应机理相同,并且烷基萘产物分布受到分子筛孔道的限制.提取5种不同减压馏分油反应后的液体产物中烷基萘、烷基菲的含量信息,发现烷基萘参数、烷基菲参数可以用来作为反映减压馏分油转化率高低的指标.%1-Methylnaphthalene/amylbenzene and tetralin were cracked in micro-pulse reactor,respectively and the contents of alkylnaphthalenes in products were determined using GC-MS.It is found that the amount of α and β position isomers are increased with increase of reaction conversion and the variation of conversion can be reflected by the ratio of alkyl substituent naphthalenes at different position.Further results confirm that the naphthalene alkylation follows the same mechanism in different reaction systems and is affected by the pore structure of the catalyst used.Hydrocarbon fingerprint information was extracted from the reaction products of five different vacuum gas oils,and the results show that the fingerprint of alkylnaphthalene and alkylphenanthrene can both be used as indicators of cracking conversion.
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