title: Regeneration of siloxane-exhausted activated carbon by advanced oxidation processes.
abstract: In the context of the biogas upgrading, siloxane exhausted activated carbons need to be regenerated in order to avoid them becoming a residue. In this work, two commercial activate carbons which were proved to be efficient in the removal of octamethylcyclotetrasiloxane (D4) from biogas, have been regenerated through advanced oxidation processes using both O3 and H2O2. After the treatment with O3, the activated carbon recovered up to 40% of the original adsorption capacity while by the oxidation with H2O2 the regeneration efficiency achieved was up to 45%. In order to enhance the H2O2 oxidation, activated carbon was amended with iron. In this case, the regeneration efficiency increased up to 92%.
authors.affiliation: LEQUIA, Institute of Environment, University of Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain.
authors.forename: Alba
authors.initials: A
authors.lastname: Cabrera-Codony
authors.affiliation: LEQUIA, Institute of Environment, University of Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain; IQS School of Engineering, Universitat Ramon Llull, Via Augusta 390, 08017 Barcelona, Spain.
authors.forename: Rafael
authors.initials: R
authors.lastname: Gonzalez-Olmos
authors.affiliation: LEQUIA, Institute of Environment, University of Girona, Campus Montilivi, E-17071 Girona, Catalonia, Spain. Electronic address: maria.martin@udg.edu.
authors.forename: Maria J
authors.initials: MJ
authors.lastname: Martín
mesh_terms: D002244:Carbon / Q000737:chemistry*; D006861:Hydrogen Peroxide / Q000737:chemistry*; D007501:Iron / Q000737:chemistry*; D016877:Oxidants / Q000737:chemistry*; D010084:Oxidation-Reduction; D010126:Ozone / Q000737:chemistry*; D059027:Recycling / Q000379:methods; D012833:Siloxanes / Q000737:chemistry*
chemical_list: D016877:Oxidants; D012833:Siloxanes; D010126:Ozone; D002244:Carbon; D006861:Hydrogen Peroxide; C024064:octamethylcyclotetrasiloxane; D007501:Iron
keywords: AOP; Activated carbon; Biogas; Regeneration; Siloxane