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首页> 外文期刊>Collection of Czechoslovak Chemical Communications >Sorption and Sorption Kinetics of Ethylbenzene in Mfi-Type Zeolites Studied by A Barometric Technique
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Sorption and Sorption Kinetics of Ethylbenzene in Mfi-Type Zeolites Studied by A Barometric Technique

机译：气压技术研究Mfi型沸石中乙苯的吸附和吸附动力学

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摘要

The sorption and sorption kinetics of ethylbenzene in H-ZSM-5 zeolites was studied varying the experimental conditions over a broad range of temperature and concentration. Isotherms and heats of adsorption as well as intracrystalline diffusivities have been determined. The isosteric heat of adsorption decreases with increasing sorbate loading due to repulsive sorbate-sorbate interaction. The diffusivity remains independent of sorbate concentration at loadings lower than a critical value of about four molecules per unit cell, while a sharp decrease is observed at higher loadings. The critical concentration slightly depends on the temperature. The relationship between diffusivity, concentration and temperature can be tentatively interpreted in terms of a complex sorbate-sorbent interaction.
机译：在广泛的温度和浓度范围内，通过改变实验条件，研究了H-ZSM-5沸石中乙苯的吸附和吸附动力学。已经确定了吸附的等温线和热以及晶内扩散率。由于排斥性山梨酸酯-山梨酸酯相互作用，吸附的等排热随着山梨酸酯负载的增加而降低。在低于每单位晶胞约四个分子的临界值的载荷下，扩散率仍与吸附剂浓度无关，而在更高的载荷下观察到急剧下降。临界浓度略微取决于温度。扩散率，浓度和温度之间的关系可以用复杂的吸附物-吸附剂相互作用来初步解释。

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