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Biogas Cleaning: Activated Carbon Regeneration for H 2 S Removal

Author

Listed:
  • Giovanni Coppola

    (Department of Energy (DENERG), Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy)

  • Davide Papurello

    (Department of Energy (DENERG), Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy)

Abstract

The coupling of fuel cell technology with wastewater treatment plants (WWTPs) is within the sustainable development imperative for the integration of energy production purposes and recovery of materials, even if research is still under development in this field. The anaerobic digestion process can be used for fuel cell feeding, only if trace contaminants are removed continuously. The most harmful and frequent contaminant is H 2 S. This article shows the results of H 2 S adsorption on activated carbon fixed-beds (dry process), since it is one of the best solutions from both the complexity and costs perspectives. Inside the wide range of commercial activated carbons, a specific commercial carbon has been used in test campaigns, since it is also used in the Società Metropolitana Acque Torino (SMAT) real plant. Thermal regeneration of spent carbons was exploited, using different conditions of temperature, treatment time and atmosphere, since it is a better cost-effective and environmentally sound option than immediate carbon disposal after adsorption. Regeneration with CO 2 showed the best regeneration ratio values. In particular, the best conditions achieved were 300 °C and 75 min of thermal treatment time, with a regeneration ratio of 30%.

Suggested Citation

  • Giovanni Coppola & Davide Papurello, 2018. "Biogas Cleaning: Activated Carbon Regeneration for H 2 S Removal," Clean Technol., MDPI, vol. 1(1), pages 1-18, June.
    • Handle: RePEc:gam:jcltec:v:1:y:2018:i:1:p:4-57:d:152208
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    References listed on IDEAS

    as
    1. Papurello, Davide & Lanzini, Andrea & Drago, Davide & Leone, Pierluigi & Santarelli, Massimo, 2016. "Limiting factors for planar solid oxide fuel cells under different trace compound concentrations," Energy, Elsevier, vol. 95(C), pages 67-78.
    2. Papurello, Davide & Lanzini, Andrea & Leone, Pierluigi & Santarelli, Massimo, 2016. "The effect of heavy tars (toluene and naphthalene) on the electrochemical performance of an anode-supported SOFC running on bio-syngas," Renewable Energy, Elsevier, vol. 99(C), pages 747-753.
    3. Papurello, Davide & Lanzini, Andrea & Tognana, Lorenzo & Silvestri, Silvia & Santarelli, Massimo, 2015. "Waste to energy: Exploitation of biogas from organic waste in a 500 Wel solid oxide fuel cell (SOFC) stack," Energy, Elsevier, vol. 85(C), pages 145-158.
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