Adsorption of Lower Alkanes on a Zinc Based Metal Organic Framework

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• 作者：Prashant Mishra ; Hari Prasad Uppara ; Bishnupada Mandal ; Sasidhar Gumma
• 刊名：Journal of Chemical & Engineering Data
• 出版年：2012
• 出版时间：September 13, 2012
• 年：2012
• 卷：57
• 期：9
• 页码：2610-2613
• 全文大小：257K
• 年卷期：v.57,no.9(September 13, 2012)
• ISSN：1520-5134

文摘

In this work, we report the gas adsorption properties of C₂H₆, C₃H₈, i-C₄H₁₀, and n-C₅H₁₂ on Zn₂(bdc)₂(dabco)(H₂O)_0.5(DMF)₄ commonly known as ZnDABCO metal organic framework (MOF). Gravimetric adsorption measurements were performed at three different temperatures (294, 314, and 350 K) and a wide pressure range. For the linear alkanes, the isotherms were of Type-I; however, i-C₄H₁₀ exhibits a Type-IV isotherm at 294 K. Adsorption capacities on ZnDABCO are found to be higher than that on convention adsorbents like activated carbons and silicalites. The isotherms for linear alkanes were fit to a modified virial model. Enthalpy of adsorption was calculated using model parameters; it increases with loading indicating the role of lateral interactions. As is to be expected, a linear correlation was observed between the polarizability of the adsorbates and the enthalpy at zero loading (vertical interactions).