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Desulfurization of Biogas via Dielectric Barrier Discharges
Author(s) -
Unseld Marina,
Szepanski Christian,
Lindermeir Andreas,
MausFriedrichs Wolfgang,
Dahle Sebastian
Publication year - 2017
Publication title -
chemical engineering and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.403
H-Index - 81
eISSN - 1521-4125
pISSN - 0930-7516
DOI - 10.1002/ceat.201600282
Subject(s) - flue gas desulfurization , biogas , hydrogen sulfide , dissociation (chemistry) , dielectric barrier discharge , nozzle , sulfur , methane , chemistry , chemical engineering , plasma , hydrogen , sulfide , dielectric , waste management , materials science , organic chemistry , physics , quantum mechanics , engineering , thermodynamics , optoelectronics
The use of CaCO 3 , FeCl 3 , and FeOOH as powder sorbents for a plasma‐based hydrogen sulfide removal from biogas mixtures was investigated. No plasma‐enhanced surface reactions were observed during the processing. However, the high surface area provided by the powders led to an increased deposition of atomic sulfur. The dissociation of H 2 S in dielectric barrier discharges was found to be effective for gas purification purposes, but limited by the backwards reaction. Medium high gas velocities in a nozzle‐like plasma reactor and high retention times in a subsequent expansion vessel thus further improved the desulfurization efficiencies. Furthermore, methane production was observed, whereas the sources could not yet be fully identified.