In-situ regeneration of activated carbon with electric potential swing desorption (EPSD) for the H2S removal from biogas

Muhammad Farooq, Muhammad Nurudeen Almustapha, M. Imran, M. A. Saeed, John M. Andresen

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15 Citations (Scopus)
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Abstract In-situ regeneration of a granular activated carbon was conducted for the first time using electric potential swing desorption (EPSD) with potentials up to 30V. The EPSD system was compared against a standard non-potential system using a fixed-bed reactor with a bed of 10g of activated carbon treating a gas mixture with 10,000 ppm H2S. Breakthrough times, adsorption desorption volume, capacities, effect of regeneration and desorption kinetics were investigated. The analysis showed that desorption of H2S using the new EPSD system was 3 times quicker compared with the no potential system. Hence, physical adsorption using EPSD over activated carbon is efficient, safe and environmental friendly and could be used for the in-situ regeneration of granular activated carbon without using a PSA and/or TSA system. Additionally, adsorption and desorption cycles can be obtained with a classical two column system, which could lead towards a more efficient and economic biogas to biomethane process.
Original languageEnglish
Pages (from-to)125-131
Number of pages7
JournalBioresource Technology
Early online date4 Oct 2017
Publication statusPublished - Feb 2018


  • Activated carbon
  • Biogas
  • EPSD
  • In-situ regeneration
  • Physical adsorption


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