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本文研究二甲苯异构体在ZSM—5型分子筛中的吸附与扩散性能。证明对二甲苯的扩散比间二甲苯快,其扩散系数比Dp/Dm=1.78。对二甲苯的吸附容量远大于间二甲苯。从吸附与扩散角度解释并验证ZSM—5型分子筛在二甲苯异构化反应中所具有的高对位选择性。
In this paper, the adsorption and diffusion properties of xylene isomers in ZSM-5 molecular sieves were studied. Prove that the spread of p-xylene is faster than m-xylene, with a diffusion coefficient ratio Dp / Dm = 1.78. Paraxylene adsorption capacity is much larger than meta-xylene. From the adsorption and diffusion point of view to explain and verify the zeolite ZSM-5 zeolite in the xylene isomerization reaction has high para selectivity.