Interactions during the Adsorption of Heterocycles on Zeolites, Silica Gels, and Activated Carbons,Journal of Chemical & Engineering Data

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Interactions during the Adsorption of Heterocycles on Zeolites, Silica Gels, and Activated Carbons
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2022-09-02 , DOI: 10.1021/acs.jced.2c00286
Laura Gehrke ₁ , Sebastian Pfeifer ₁ , Christian Bläker ₁ , Christoph Pasel ₁ , Dieter Bathen _{1,

2}

Affiliation

The adsorption of the heterocycles cyclopentane, tetrahydrothiophene, tetrahydrofuran, and pyrrolidine on five adsorbents (one zeolite, two activated carbons, and two silica–alumina gels) was studied with a sensor gas calorimeter at 25 °C. Systematic data on simultaneously measured adsorption isotherms and load-dependent heats of adsorption are given. The adsorption isotherms show that the maximum loading is arranged according to the molar volume of the adsorptives. Having the lowest molar volume, tetrahydrofuran reaches the highest saturation loading on all adsorbents. Based on the measured data, the prevailing interactions and their strength are analyzed. Depending on the functionalities, dispersion, induction, and dipole interactions as well as hydrogen bonds can be formed between the adsorptives and the adsorbents’ surfaces. Since pyrrolidine can act as a donor and an acceptor in hydrogen bonding, it achieves the highest heat of adsorption in all measurements. As pyrrolidine shows a stepwise decrease in the heat of adsorption on the silica–alumina gels, it represents a promising sample molecule for an accurate energetic characterization of silica–alumina gels.

中文翻译：

杂环在沸石、硅胶和活性炭上吸附过程中的相互作用

使用传感器气体热量计在 25 °C 下研究了杂环环戊烷、四氢噻吩、四氢呋喃和吡咯烷在五种吸附剂（一种沸石、两种活性炭和两种二氧化硅-氧化铝凝胶）上的吸附。给出了同时测量的吸附等温线和负载相关的吸附热的系统数据。吸附等温线表明最大负载量是根据吸附剂的摩尔体积排列的。具有最低摩尔体积的四氢呋喃在所有吸附剂上达到最高饱和负载。根据测量数据，分析了主要的相互作用及其强度。根据功能，分散、感应和偶极相互作用以及氢键可以在吸附剂和吸附剂表面之间形成。由于吡咯烷可以作为氢键的供体和受体，因此它在所有测量中都达到了最高的吸附热。由于吡咯烷在二氧化硅-氧化铝凝胶上的吸附热逐渐降低，因此它代表了一种有前途的样品分子，可用于准确地表征二氧化硅-氧化铝凝胶的能量。

更新日期：2022-09-02

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