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研究了混合碳四、正己烷在微波条件下,在锌和镍双金属改性 H Z S M- 5 上芳构化反应,考察了反应温度和反应时间对气液相产物分布的影响并与常规加热作了比较,详细探讨了微波芳构化反应机理。实验结果表明:(1) 在反应温度400 ℃,质量空速1 .0 h - 1 ,以混合碳四为原料,经微波芳构化和常规加热芳构化实验对比,微波芳构化下的芳烃收率提高约17 .08 % , B T X 选择性远远高于常规加热;(2) 从反应温度对性能影响的考察表明,反应温度变化对微波芳构化反应性能的影响比较大。微波芳构化具有加快反应速率,提高选择性和芳烃收率及降低反应温度等优点,是更好的实现择形催化的好方法。
The effects of reaction temperature and reaction time on the distribution of gas and liquid products were investigated and the effects of reaction temperature and reaction time on the distribution of gas and liquid products were investigated. Compared with conventional heating, the mechanism of microwave aromatization was discussed in detail. The experimental results show that: (1) The mass space velocity is 1 at the reaction temperature of 400 ℃. 0 h - 1. The yield of aromatics in microwave aromatization increased by about 17 with the experiment of microwave aromatization and conventional heating aromatization. 08%, B T X selectivity is much higher than that of conventional heating; (2) The investigation of the effect of reaction temperature on the performance shows that the influence of reaction temperature on the microwave aromatization reaction is relatively large. Microwave aromatization has the advantages of accelerating the reaction rate, increasing the selectivity and yield of aromatics and reducing the reaction temperature, which is a good way to realize the shape-selective catalysis.