کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
635120 1456091 2012 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Gas mixture solubilities in polyethylene below its melting temperature: Experimental and molecular simulation studies
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی تصفیه و جداسازی
پیش نمایش صفحه اول مقاله
Gas mixture solubilities in polyethylene below its melting temperature: Experimental and molecular simulation studies
چکیده انگلیسی

We present solubility values of gas mixtures (CH4 + CO2 and CH4 + H2) in polyethylene below its melting temperature. The objective of such studies is to assess the existence of specific interactions between the matrix and one type of penetrant molecule. Data were acquired using both experiments and molecular simulations. Experiments were performed on a medium density polyethylene with pure and mixed gases for temperatures in the range 308–313 K. Hence, the solubility coefficient of each component of a gas mixture was determined. Monte Carlo simulations in the osmotic ensemble were also used to predict gas concentrations in the polymer phase. A good agreement with experimental data is observed. This is a significant validation of the use of an ad hoc constraint in the osmotic ensemble simulations to mimic the overall effect of the crystalline regions and to predict quantitatively solubility data in this semicrystalline system.


► We have computed and measured gas solubilities in polyethylene.
► Computations use Monte Carlo simulations in the osmotic ensemble.
► Crystalline morphology is accounted for using a uniform external stress.
► Gas solubilities for methane–carbon dioxide and methane–hydrogen have been obtained.
► Simulations are in good agreement with experimental values which validates our methodology.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Membrane Science - Volumes 390–391, 15 February 2012, Pages 194–200
نویسندگان
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