Biochars as potential adsorbers of CH4, CO2 and H2S

Sumathi Sethupathi, Ming Zhang, Anushka Upamali Rajapaksha, Sang Ryong Lee, Norhusna Mohamad Nor, Abdul Rahman Mohamed, Mohammad Al-Wabel, Sang Soo Lee, Yong Sik Ok

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

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.

Original languageEnglish
Article number121
JournalSustainability (Switzerland)
Volume9
Issue number1
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes

Keywords

  • Adsorption
  • Biochar
  • Carbon dioxide
  • Hydrogen sulphide

ASJC Scopus subject areas

  • Geography, Planning and Development
  • Renewable Energy, Sustainability and the Environment
  • Management, Monitoring, Policy and Law

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    Sethupathi, S., Zhang, M., Rajapaksha, A. U., Lee, S. R., Nor, N. M., Mohamed, A. R., Al-Wabel, M., Lee, S. S., & Ok, Y. S. (2017). Biochars as potential adsorbers of CH4, CO2 and H2S. Sustainability (Switzerland), 9(1), [121]. https://doi.org/10.3390/su9010121