1 Department of Energy Technology, The Faculty of Engineering and Science, Aalborg University, VBN2 The Faculty of Engineering and Science (ENG), Aalborg University, VBN3 Fluid Mechanics and Combustion, The Faculty of Engineering and Science, Aalborg University, VBN4 Esbjerg Energy Section, The Faculty of Engineering and Science, Aalborg University, VBN5 Flemish Institute for Technological Research6 Flensburg University of Applied Sciences7 Queen's University Belfast8 Flemish Institute for Technological Research9 Queen's University Belfast
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.