合成沸石13X，4A，5A和Beta对CO <sub>2</sub>和N <sub>2的</sub>平衡吸附研究,Journal of Chemical & Engineering Data

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合成沸石13X，4A，5A和Beta对CO ₂和N _2的平衡吸附研究
Journal of Chemical & Engineering Data ( IF 2.0 ) Pub Date : 2019-12-03 , DOI: 10.1021/acs.jced.9b00690
Elham Khoramzadeh ₁ , Masoud Mofarahi _{1,

2} , Chang-Ha Lee ₂

Affiliation

这项研究的重点是对广泛使用的13X，4A，5A和β型沸石进行CO ₂吸附的综合合成和分析。利用水热法合成了沸石。我们特别注意合成沸石的表征。最常用的仪器分析技术，包括X射线衍射（XRD），扫描电子显微镜（SEM），Brunauer-Emmett-Teller（BET）方法，热重分析（TGA），差示热重分析（DTG），差示热分析（DTA）和X射线荧光（XRF）用于本研究。所有结果表明这些类型沸石的成功合成。考虑使用CO ₂ / N ₂系统研究CO的吸附和分离₂。利用体积法，在温度283、303和323 K以及压力高达1.6 bar的条件下，获得了颗粒状沸石上CO ₂和N ₂的吸附平衡数据。沸石13X的吸附量最高，β沸石的吸附量最低。使用Sips和Langmuir等温线模型来匹配吸附等温线数据。实验数据表明，与具有六个参数的Sips模型具有最佳的相关性。利用研究温度下的纯吸附等温线数据，通过Clausius–Clapeyron方程评估了所有研究的吸附剂对CO ₂和N ₂的吸附等温吸附热。另外，二元吸附数据和CO _2的选择性通过理想的吸附溶液理论（IAST）确定所有吸附剂上的N ₂超过₃。从所有获得的结果可以得出结论，在实际应用中，所研究的沸石，尤其是13X沸石，有望成为捕获CO _2的吸附剂。

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Equilibrium Adsorption Study of CO2 and N2 on Synthesized Zeolites 13X, 4A, 5A, and Beta

This study focused on comprehensive synthesis and analysis for CO₂ adsorption of the widely used zeolites 13X, 4A, 5A, and beta. Zeolites were synthesized utilizing the hydrothermal method. We paid special attention to the characterization of synthesized zeolites. The most common instrumental analysis techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), the Brunauer–Emmett–Teller (BET) method, thermogravimetric analysis (TGA), differential thermal gravimetry (DTG), differential thermal analysis (DTA), and X-ray fluorescence (XRF), were utilized in this study. All results indicated the successful synthesis of these types of zeolites. The CO₂ /N₂ system was considered for the investigation of adsorption and separation of CO₂. The adsorption equilibrium data of CO₂ and N₂ on pelletized zeolites were taken at temperatures of 283, 303, and 323 K and pressures up to 1.6 bar utilizing a volumetric method. The highest adsorption capacity was obtained for zeolite 13X and the lowest for zeolite beta. The Sips and Langmuir isotherm models were used for matching adsorption isotherm data. Experimental data showed the best correlation with the Sips model with six parameters. The isosteric heats of adsorption for CO₂ and N₂ on all the studied adsorbents were evaluated utilizing the pure adsorption isotherms data at studied temperatures by the Clausius–Clapeyron equation. Also, binary adsorption data and selectivities of CO₂ over N₂ on all adsorbents were determined by ideal adsorbed solution theory (IAST). It can be concluded from all the obtained results that the studied zeolites, especially zeolite 13X, can be promising adsorbents to capture CO₂ in practical applications.

更新日期：2019-12-04

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