sakurajun Podawacz Piłek
Dołączył: 30 Paź 2020 Posty: 38
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Wysłany: Sro Lis 11, 2020 03:55 Temat postu: Preparation of activated carbons from unburnt coal in bottom |
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Preparation of activated carbons from unburnt coal in bottom ash with KOH activation for liquid-phase adsorptionactivated charcoal pellets
In this work, unburnt coal (UC) in bottom ash from coal-fired power plants was soaked in KOH solution and activated for 1 h at 780 degrees C. The yield of activated carbons varied from 47.8 to 54.8% when the KOH/UC weight ratio changed from 2 to 4. Pore properties of these activated carbons including the BET surface area, pore volume, pore size distribution, and pore diameter were characterized based on N(2) adsorption isotherms. It was shown that the isotherms for the adsorption of methylene blue, acid blue 74, and 4-chlorophenol from aqueous solutions on these activated carbons at 30 degrees C were well fitted by the Langmuir equation (correlation coefficient r(2) > 0.9968). coal activated carbon manufacturersThe adsorption capacities of methylene blue, acid blue 74, and 4-chlorophenol were obtained to be 2.40-2.88, 0.57-1.29, and 2.34-5.62 mmol/g, respectively. Moreover, the adsorption kinetics could be suitably described by the Elovich equation. |
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