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Energies 2018, 11(7), 1748; https://doi.org/10.3390/en11071748

Preparation and Evaluation of a Coconut Shell-Based Activated Carbon for CO2/CH4 Separation

1
LR11ES54-Laboratory of “Chemical Processes and Industrials Systems”, University of Gabes, Gabès 6029, Tunisia
2
National School of Engineers of Gabes (ENIG), University of Gabes, Omar Ibn Elkhattab Street, Zrig, Gabès 6029, Tunisia
3
Instituto Nacional del Carbón, INCAR-CSIC, c/Francisco Pintado Fe 26, 33011 Oviedo, Spain
4
Higher Institute of Applied Sciences and Technology of Gabes, University of Gabes, Omar Ibn Elkhattab Street, Zrig, Gabes 6029, Tunisia
*
Author to whom correspondence should be addressed.
Received: 7 June 2018 / Revised: 24 June 2018 / Accepted: 29 June 2018 / Published: 3 July 2018
(This article belongs to the Special Issue Biomass Chars: Elaboration, Characterization and Applications Ⅱ)
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Abstract

Biomass is a widely distributed and renewable source of carbon. The main objective of this work is to produce an activated carbon from coconut shells with suitable characteristics to separate CO2 from biogas. The textural characterization of the adsorbent has been determined. Pure component adsorption isotherms of CO2 and CH4 at 30, 50 and 70 °C have been measured. The results reveal that the activated carbon had high CO2 adsorption capacity. Equilibrium of adsorption of CO2 and CH4 adsorption on the produced activated carbon reached 8.36 mmol/g and 4.63 mmol/g, respectively, at 30 °C and 10 bars. Moreover, the performance of the produced activated carbon, as a potential adsorbent for CO2 capture from a CO2/CH4 gas mixture, has been evaluated under dynamic conditions in a dedicated fixed-bed setup. The CO2 and CH4 adsorption capacities of the produced activated carbon are estimated to be 1.86 and 0.52 mol/kg, respectively, at 30 °C and 1 bar. View Full-Text
Keywords: biogas purification; coconut shells; biomass valorization; textural characterization; adsorption isotherms; breakthrough curves biogas purification; coconut shells; biomass valorization; textural characterization; adsorption isotherms; breakthrough curves
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Abdeljaoued, A.; Querejeta, N.; Durán, I.; Álvarez-Gutiérrez, N.; Pevida, C.; Chahbani, M.H. Preparation and Evaluation of a Coconut Shell-Based Activated Carbon for CO2/CH4 Separation. Energies 2018, 11, 1748.

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