Evaluation of Pure-Component Adsorption Properties of DD3R Based on the Langmuir and Sips Models

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• 作者：Alessio Caravella ; Pasquale F. Zito ; Adele Brunetti ; Enrico Drioli ; Giuseppe Barbieri
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2015
• 出版时间：August 13, 2015
• 年：2015
• 卷：60
• 期：8
• 页码：2343-2355
• 全文大小：704K
• ISSN：1520-5134

文摘

The pure-component adsorption properties of DD3R zeolite were evaluated for various light gases such as H₂, CH₄, CO₂, CO, and N₂ in a wide temperature range of (195鈥?73) K. These properties, representing the macroscopic results of the microscopic zeolite鈥搒pecies interactions, are expressed in terms of parameters of both Langmuir and Sips adsorption models. Furthermore, the CH₄/CO₂ adsorption selectivity in binary mixture calculated based on the ideal adsorption solution theory (IAST) is also reported as a function of temperature and pressure, showing the actual separation performance of DD3R as adsorbent mean. A number of experimental literature data were considered in order to cover these wide temperature and pressure ranges, wider than available in previous works. A comparative analysis of the two models and the literature data is also provided, showing also the increase of the calculation uncertainty with increasing number of model parameters using the dual-Langmuir model as an instance. The calculated adsorption parameters will be useful to different end-users and purposes, e.g., from zeolites used as adsorbents to zeolites used as membranes in a number of applications ranging from the laboratory to the industrial scale.