Influence of NH3/CO2 activation on the CO2/H2S adsorption capacity of cellulose char

Abstract

Anaerobic co-digestion is an attractive opportunity for the energetic valorization of several organic residues generated in the livestock and agricultural sector. A combustible biogas is obtained, that could be used as a source of energy on the farm. The biogas is mainly composed of CH₄, CO₂ and trace amounts of other components such as H₂S. However, to reduce gas emissions  and broaden the application of biogas as a fuel or as bio-methane, the concentration of CO₂ and H₂S must be decreased. This study examines the effect of NH₃ functionalization and/or CO₂ activation (at 700 ºC) of cellulose pyrolysis chars (produced at 750 ºC) on the adsorption of CO₂ and H₂S from a gas stream.