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标题：Biochars as Potential Adsorbers of CH 4, CO 2 and H 2 S
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作者：Sethupathi, Sumathi ; Zhang, Ming ; Rajapaksha, Anushka Upamali 等
期刊名称：Sustainability
印刷版ISSN：2071-1050
出版年度：2017
卷号：9
期号：1
页码：1-10
出版社：MDPI, Open Access Journal
摘要：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 H 2 S and CO 2 . This study assessed the adsorption of CH 4 , H 2 S, and CO 2 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 CH 4 was not adsorbed well by the subjected biochars whereas CO 2 and H 2 S were successfully captured. The H 2 S and CO 2 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.
关键词：adsorption; biochar; carbon dioxide; hydrogen sulphide