摘要
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。
On the base of theoretical model for the diffusion-reaction on HZ-SM-5 molecular sieves, using the experimental adsorption equilibrium constants, diffusivities and reaction rate constants, the xylene isomeriza-tion on HZSM-5 was analyzed. With the increase of the Thiele Modulus, the ratio of m -xylene to o -xylene decreases in the product of p -xylene isomerization, but the lowest value of the ratio is 3.3? the ratio of p-xylene to o-xylene in the product of m-xylene isomerization increases from 1.0 to 2,7; for the o-xylene isomerization, the ratio of m-xylene to p -xylene in the product decreases, but the lowest value of the ratio is 0.4. The above theoretical results are consistent with the experimental results.
基金
国家自然科学基金
