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Biogas Purification: A Comparison of Adsorption Performance in D4 Siloxane Removal Between Commercial Activated Carbons and Waste Wood-Derived Char Using Isotherm Equations
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H2S Removal with Sorbent Obtained from Sewage Sludges

Energy Center, Politecnico di Torino, Via Paolo Borsellino 38/16, 10138 Turin, Italy
Department of Energy (DENERG), Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Turin, Italy
Author to whom correspondence should be addressed.
Processes 2020, 8(2), 130;
Received: 20 December 2019 / Revised: 3 January 2020 / Accepted: 14 January 2020 / Published: 21 January 2020
Biochar obtained from sewage sludges are adopted for biogas cleaning. Sewage sludges are treated considering temperature, dwell time, activating agent, heating, and flow rate. The best performances achieved are registered considering the char produced at 400 °C using CO2 as an activating agent with a dwell time of 2 h. The adsorption capacity for the biogas cleaning CH4/CO2/H2S (20 ppm(v)) increased from 1.3 mg/g to 5.9 mg/g with the bed height. Future research with chemical activation processes will be made to improve the adsorption capacity achieved to produce cheaper sorbents than commercial ones. View Full-Text
Keywords: biogas; solid sorbent production; H2S removal; sewage sludge biogas; solid sorbent production; H2S removal; sewage sludge
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Papurello, D.; Lanzini, A.; Bressan, M.; Santarelli, M. H2S Removal with Sorbent Obtained from Sewage Sludges. Processes 2020, 8, 130.

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