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Sustainability 2017, 9(1), 121;

Biochars as Potential Adsorbers of CH4, CO2 and H2S

Faculty of Engineering and Green Technology, Universiti Tunku Abdul Rahman, 31900 Kampar, Perak, Malaysia
Department of Environmental Engineering, China Jiliang University, Hangzhou 310018, China
Korea Biochar Research Center & School of Natural Resources and Environmental Science, Kangwon National University, Chuncheon 24341, Korea
Department of Basic Sciences, Faculty of Health Sciences, The Open University of Sri Lanka, Nawala, Nugegoda 10250, Sri Lanka
National Institute of Animal Science, RDA, Wanju55365, Korea
School of Chemical Engineering, Universiti Sains Malaysia, 14300 Nibong Tebal, Pulau Pinang, Malaysia
Soil Science Department, College of Food & Agricultural Sciences, King Saud University, P.O. Box 2460, Riyadh 11451, Saudi Arabia
Authors to whom correspondence should be addressed.
Academic Editor: Marc A. Rosen
Received: 10 November 2016 / Revised: 23 December 2016 / Accepted: 4 January 2017 / Published: 14 January 2017
(This article belongs to the Special Issue Environmental Management of Post-Epidemic Mass Carcasses Burial Sites)
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Methane gas, as one of the major biogases, is a potential source of renewable energy for power production. Biochar can be readily used to purify biogas contaminants such as H2S and CO2. This study assessed the adsorption of CH4, H2S, and CO2 onto four different types of biochars. The adsorption dynamics of biochars were investigated in a fixed-bed column, by determining the breakthrough curves and adsorption capacities of biochars. The physicochemical properties of biochars were considered to justify the adsorption performance. The results showed that CH4 was not adsorbed well by the subjected biochars whereas CO2 and H2S were successfully captured. The H2S and CO2 breakthrough capacity were related to both the surface adsorption and chemical reaction. The adsorption capacity was in the following order: perilla > soybean stover > Korean oak > Japanese oak biochars. The simultaneous adsorption also leads to a competition of sorption sites. Biochars are a promising material for the biogas purification industry. View Full-Text
Keywords: adsorption; biochar; carbon dioxide; hydrogen sulphide adsorption; biochar; carbon dioxide; hydrogen sulphide

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Sethupathi, S.; Zhang, M.; Rajapaksha, A.U.; Lee, S.R.; Mohamad Nor, N.; Mohamed, A.R.; Al-Wabel, M.; Lee, S.S.; Ok, Y.S. Biochars as Potential Adsorbers of CH4, CO2 and H2S. Sustainability 2017, 9, 121.

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