Biogas produced by anaerobic digestion of organic matter contains a large amount of methane (50-70 % v/v) and it is diluted by carbon dioxide (30-40 % v/v) and several contaminants like reduced sulphur compounds (100-1000 ppmv) and traces of siloxanes and halogenated volatile organic compounds . Currently, biogas is used in cogeneration units, burned directly in internal-combustion (I.C.), reciprocating engines or microturbines after a bland treatment. Fuel cells are more recent options with promising efficiency and sustainability. Nevertheless this innovative technology shows low tolerances toward many components, especially H2S, halides and siloxanes. Between them hydrogen sulphide, toxic and corrosive, is the most concentrated biogas component. Consequently H2S fraction has to be dramatically reduced below 0.5÷1 ppmv (MCFC tolerance limit) to avoid catalyst deactivation and loss of electrolyte. Activities are devoted to design a desulphurization process to allow feeding a Molten Carbonate Fuel Cell with farm biogas. Following a bibliographical analysis of the main processes of natural gas/biogas purification, a "two steps" process was selected as the most suitable for MCFC application [2-4]. Commercial catalysts and adsorbents were characterized (Scanning Electron Microscopy, SEM; X-ray diffraction, XRD; Thermo-gravimetric analysis, TGA); a new adsorbent is now synthesizing and testing.
|Publication status||Published - 2009|
|Event||3rd European Fuel Cell Technology and Applications - Piero Lunghi Conference, EFC 2009 - Rome, Italy|
Duration: 1 Jan 2009 → …
|Conference||3rd European Fuel Cell Technology and Applications - Piero Lunghi Conference, EFC 2009|
|Period||1/1/09 → …|
All Science Journal Classification (ASJC) codes
- Fuel Technology
Naticchioni, V., De Francesco, M., Galli, S., & Monteleone, G. (2009). Study on advanced processes and materials for biogas desulphurization. Paper presented at 3rd European Fuel Cell Technology and Applications - Piero Lunghi Conference, EFC 2009, Rome, Italy.