کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6590263 | 456855 | 2015 | 10 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
On the phase transition of argon adsorption in an open end slit pore-Effects of temperature and pore size
ترجمه فارسی عنوان
در انتقال فاز جذب آرگون در منافذ شکاف باز بازده اثر حرارت و اندازه منافذ
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کلمات کلیدی
جذب، انتقال فاز، آرگون، گرافیت، منافذ شکسته،
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
چکیده انگلیسی
The phase evolution of argon adsorbed in open ended graphitic slit pores at temperatures below the 2D-critical temperature of the first layer was simulated using the grand canonical Monte Carlo (GCMC) and meso-canonical ensembles (MCE). In the latter the adsorption system is connected to a finite reservoir and the combined system is a canonical ensemble. Hysteresis loops and sigmoid van der Waals loops were found for the GCMC and MCE simulations respectively, corresponding to the observed 2D-transitions, which comprised vapor-solid, vapor-liquid and liquid-solid changes of state depending on the temperature. The MCE isotherms in large open end pores exhibited a sequential adsorption, not previously noted in the literature, where the monolayer filling on one wall is followed by monolayer filling on the opposite wall, giving rise to a double van der Waals loop. When the spacing between the pore walls is decreased, this double-vdW loop evolves to form a fused single loop, and the transition shifts from being predominantly a surface adsorption to pore volume filling.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Chemical Engineering Science - Volume 126, 14 April 2015, Pages 257-266
Journal: Chemical Engineering Science - Volume 126, 14 April 2015, Pages 257-266
نویسندگان
Poomiwat Phadungbut, D.D. Do, D. Nicholson, Chaiyot Tangsathitkulchai,