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本文在建立扩散-反应数学模型的基础上,对HZSM-5催化的二甲苯异构化反应进行了分析。结果表明,基于实验的吸附、扩散、和反应参数,随着反应过程Thiele模数的增加,对二甲苯异构化产物中的间二甲苯与邻二甲苯之比减小,且有一下限为3.3;随着Thiele模数的增加,间二甲苯异构化产物中的对二甲苯与邻二甲苯之比从1.0增加到2.7;随着Thiele模数的增加,邻二甲苯异构化产物中的间二甲苯与对二甲苯之比减小,且有下限为0.4.以上结果与实验结果相一致,表明本文理论的合理性。
Based on the mathematical model of diffusion-reaction, the reaction of xylene isomerization catalyzed by HZSM-5 was analyzed in this paper. The results showed that the ratio of m-xylene to o-xylene in para-xylene isomerization products decreased with the increase of Thiele modulus of the reaction process based on the experimental adsorption, diffusion and reaction parameters, and a lower limit of 3.3 ; With the increase of Thiele modulus, the ratio of p-xylene to o-xylene in m-xylene isomerization products increased from 1.0 to 2.7; with the increase of Thiele modulus, the The ratio of m-xylene to p-xylene is reduced, and the lower limit is 0.4. The above results are consistent with the experimental results, indicating the rationality of this paper.