CF4 Adsorption on Microporous Carbons Prepared by Carbonization of Poly(vinylidene fluoride)

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• 作者：Seung Wan Choi ; Seok-Min Hong ; Jong-Ho Park ; Hee Tae Beum ; Ki Bong Lee
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2015
• 出版时间：September 2, 2015
• 年：2015
• 卷：54
• 期：34
• 页码：8561-8568
• 全文大小：578K
• ISSN：1520-5045

文摘

CF₄ is a gas with high global warming potential and has an extremely long atmospheric lifetime. This study developed a method for capturing CF₄ gas via adsorption using microporous carbons. Microporous carbon adsorbents were synthesized by a facile protocol involving carbonization of poly(vinylidene fluoride) (PVDF) at high temperatures (400鈥?00 掳C) without additional activation, and the effects of carbonization on the characteristics and CF₄ adsorption of PVDF-based adsorbents were investigated. Increasing the carbonization temperature enhanced the textural properties of the adsorbent, resulting in the increased CF₄ adsorption capacity. Above 700 掳C, PVDF was fully dehydrofluorinated, and the microporous carbon synthesized at 800 掳C exhibited superior textural properties with a maximum CF₄ adsorption capacity of 1.85 mol/kg at 25 掳C under atmospheric pressure. The PVDF-based microporous carbons also exhibited fast adsorption鈥揹esorption kinetics, excellent cyclic stability, and good selectivity for CF₄ over N₂ at relatively low CF₄ pressures. The microporous carbons developed in this study have potential for use as novel adsorbents for CF₄ capture.