One-step conversion of agro-wastes to nanoporous carbons: Role in separation of greenhouse gases
| Autor: | Gabriela I. Faux, Bryan Taylor, Yiting Lin, Nicole Alexander, Dipendu Saha, Daniel F. Joyce, Gerassimos Orkoulas, Vladimir Shteyn |
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| Rok vydání: | 2018 |
| Předmět: |
Environmental Engineering
Bioengineering 02 engineering and technology 010402 general chemistry 01 natural sciences chemistry.chemical_compound Greenhouse Gases Nanopores Adsorption medicine Lignin Waste Management and Disposal Potassium hydroxide Renewable Energy Sustainability and the Environment Nanoporous Carbonization General Medicine Microporous material Carbon Dioxide 021001 nanoscience & nanotechnology Carbon 0104 chemical sciences chemistry Chemical engineering 0210 nano-technology Selectivity Activated carbon medicine.drug |
| Zdroj: | Bioresource technology. 256 |
| ISSN: | 1873-2976 |
| Popis: | 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 727–2254 m2/g, and total pore volumes 0.34–1.14 cm3/g. These are higher than the majority of agro-waste derived carbons reported in the literature. For all the carbons, CO2 adsorption at 298 K was higher than SF6 followed by N2 suggesting a possible separation of CO2 and SF6 from N2. The adsorbed amounts of CO2 at 298 K and 273 K and at pressures up to 760 Torr were 7.24 and 9.4 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. |
| Databáze: | OpenAIRE |
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