Saturation loadings on 13X (faujasite) zeolite above and below the critical conditions. Part I: alkane data evaluation and modeling
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- 作者：Alaa Al Mousa ; Dana Abouelnasr ; Kevin F. Loughlin
- 关键词：Alkanes C1–C8 ; 13X zeolite ; Sorbate densities ; Saturation loadings ; Sorbate molar volumes ; Critical conditions
- 刊名：Adsorption
- 出版年：2015
- 出版时间：May 2015
- 年：2015
- 卷：21
- 期：4
- 页码：307-320
- 全文大小：1,461 KB
- 参考文献：Al Mousa, A., Abouelnasr, M., Loughlin, K.: Saturated loadings on 13X (faujasite) zeolite above and below the critical conditions. Part II: unsaturated and cyclic hydrocarbons data evaluation and modeling, Adsorption (2015a). doi:10.-007/?s10450-015-9671-y
Al Mousa, A., Abouelnasr, M., Loughlin, K.: Saturation loadings on 13X (faujasite) zeolite above and below the critical conditions. Part III: inorganic, and ethyl acetate data evaluation and modeling, unpublished work, (2015b)
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Dana Abouelnasr (2) (3)
Kevin F. Loughlin (2)
1. Petrofac International Ltd, Sharjah, UAE
2. Department of Chemical Engineering, American University of Sharjah, P.O. Box 26666, Sharjah, UAE
3. California State University at Bakersfield, Bakersfield, USA - 刊物类别：Chemistry and Materials Science
- 刊物主题：Chemistry
Surfaces and Interfaces and Thin Films
Industrial Chemistry and Chemical Engineering
Engineering Thermodynamics and Transport Phenomena - 出版者：Springer Netherlands
- ISSN：1572-8757
文摘
The saturation loadings for subcritical adsorption of n-, iso- and neo alkanes C1–C8 in 13X zeolite are modeled using the modified Rackett model of Spencer and Danner (J Chem Eng Data 17:236-40, 1972) for the saturated liquid densities combined with crystallographic data for the 13X zeolite. For validation of this model, alkane adsorption data in the literature is first critically evaluated and then compared to the model. The saturation loading of each isotherm that approaches saturation is extracted from the data. Log–log plots are used to determine whether each isotherm is near saturation; isotherms that exhibit a \(({{\partial \text{ \ ln \ } q)} \mathord{\left/ ({\vphantom {{\partial { \ ln \ } q} {\partial { \ ln \ }p}}} \right. \kern-0pt} {\partial \text { \ ln \ }p}})\) slope of zero at their maximum pressure point are assumed to be saturated. Isotherms not fulfilling this criterion are deemed unsaturated and not considered further. The theoretical equation satisfactorily models the available experimental data for the n- alkanes. However, steric factors are required for the model to fit iso alkanes and neo-pentane. For supercritical temperatures, no model presently exists to explain the data. However, the data are satisfactorily modeled with an equation of the form qmax?=?8.5?±?2.5?g/100?g.