title: Influence of trace substances on methanation catalysts used in dynamic biogas upgrading.
abstract: The aim of this work was to study the possible deactivation effects of biogas trace ammonia concentrations on methanation catalysts. It was found that small amounts of ammonia led to a slight decrease in the catalyst activity. A decrease in the catalyst deactivation by carbon formation was also observed, with ammonia absorbed on the active catalyst sites. This was via a suppression of the carbon formation and deposition on the catalyst, since it requires a higher number of active sites than for the methanation of carbon oxides. From the paper findings, no special pretreatment for ammonia removal from the biogas fed to a methanation process is required.
authors.affiliation: Aalborg University Esbjerg, Niels Bohrsvej 8, 6700 Esbjerg, Denmark; Flensburg University of Applied Sciences, Kanzleistr. 91, 24943 Flensburg, Germany. Electronic address: lars.juergensen@fh-flensburg.de.
authors.forename: Lars
authors.initials: L
authors.lastname: Jürgensen
authors.affiliation: Flemish Institute for Technological Research (VITO), Boeretang 200, 2400 Mol, Belgium.
authors.forename: Ehiaze Augustine
authors.initials: EA
authors.lastname: Ehimen
authors.affiliation: Flensburg University of Applied Sciences, Kanzleistr. 91, 24943 Flensburg, Germany.
authors.forename: Jens
authors.initials: J
authors.lastname: Born
authors.affiliation: Aalborg University Esbjerg, Niels Bohrsvej 8, 6700 Esbjerg, Denmark.
authors.forename: Jens Bo
authors.initials: JB
authors.lastname: Holm-Nielsen
authors.affiliation: Queens University Belfast, University Rd, Belfast, United Kingdom.
authors.forename: David
authors.initials: D
authors.lastname: Rooney
mesh_terms: D000641:Ammonia / Q000032:analysis*; D056804:Biofuels; D002384:Catalysis; D003077:Coke / Q000032:analysis; D008697:Methane / Q000032:analysis*; D010084:Oxidation-Reduction; D013696:Temperature
chemical_list: D056804:Biofuels; D003077:Coke; D000641:Ammonia; D008697:Methane
keywords: Biogas; Catalysis; Methanation; Poisoning; Sabatier reaction