Impact of impurities on biogas valorization through dry reforming of methane reaction |
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Affiliation: | Unité de Chimie Environnementale et Interactions sur le Vivant (UCEIV, UR4492), Université du Littoral Côte d’Opale, SFR Condorcet FR CNRS, 145 Avenue Maurice Schuman, 59140 Dunkerque, France |
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Abstract: | Biogas is mainly composed of methane, carbon dioxide as well as other compounds such as water and volatile organic compounds (VOCs). In this study, the composition of a biogas produced in a landfill is determined using gas chromatography. CH4 and CO2 represent 60% of its composition, rendering a valorization via the dry reforming of methane (DRM) reaction very promising. Moreover, H2O and VOCs represent respectively 1.5% and 1500 ppm of biogas, which may affect the catalytic efficiency. The performance of CoNiMgAl catalysts derived from hydrotalcites is studied in the presence of toluene, water and a combination of both. The presence of toluene causes a progressive increase in the catalytic activity as well as higher carbon deposition. The addition of water decreases CO2 conversion and carbon formation and increases the H2/CO to values closer to 1. When both molecules are added, the catalytic activity remains stable, confirming that DRM is possible in the presence of both compounds. |
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Keywords: | Dry reforming Bi-reforming Methane Biogas Hydrotalcite Toluene |
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