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A Porous Carbon with Excellent Gas Storage Properties from Recycled Polystyrene

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https://www.mdpi.com/2079-4991/9/5/726
Original languageEnglish
JournalNanomaterials
Volume9
Issue number5
Early online date10 May 2019
DOIs
Publication statusE-pub ahead of print - 10 May 2019

Abstract

Abstract: We describe the synthesis and the gas adsorption properties of a porous carbonaceous 1 material, obtained from commercial expanded polystyrene. The first step consists in the 2 Friedel-Craft reaction of the dissolved polystyrene chains with a bridging agent, to form a 3 highly-crosslinked polymer, with permanent porosity of 0.7 cm3/g; then this polymer is treatedwith 4 potassium hydroxide at high temperature to produce a carbon material with porous volume larger 5 than 1.4 cm3/g and a distribution of ultramicro-, micro- and mesopores. After characterization of 6 the porous carbon and determination of the bulk density, the methane uptake was measured using 7 a volumetric apparatus to pressures up to 30 bar. The equilibrium adsorption isotherm obtained is 8 among the highest ever reported for this kind of materials. The interest of this product lies both in 9 its excellent performance and in the virtually costless starting material.

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