Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7067941 | Bioresource Technology | 2018 | 28 Pages |
Abstract
Highly microporous carbons have been synthesized from four types of agro-wastes of lignin, walnut shells, orange peels and apricot seeds by one-step carbonization/activation with potassium hydroxide (KOH) in varying ratios. The resultant carbons demonstrated BET specific surface areas of 727-2254â¯m2/g, and total pore volumes 0.34-1.14â¯cm3/g. These are higher than the majority of agro-waste derived carbons reported in the literature. For all the carbons, CO2 adsorption at 298â¯K was higher than SF6 followed by N2 suggesting a possible separation of CO2 and SF6 from N2. The adsorbed amounts of CO2 at 298â¯K and 273â¯K and at pressures up to 760â¯Torr were 7.24 and 9.4â¯mmol/g, respectively which, to the best of our knowledge, are the highest CO2 uptakes in these temperatures by any carbon material reported so far. For all the gases, selectivity, mixed adsorption isotherms and adsorption breakthrough have been simulated from experimental data.
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Authors
Dipendu Saha, Bryan Taylor, Nicole Alexander, Daniel F. Joyce, Gabriela I. Faux, Yiting Lin, Vladimir Shteyn, Gerassimos Orkoulas,