Servizio Comunitario di Informazione in materia di Ricerca e Sviluppo - CORDIS

Biological siloxane removal system

Organosiloxanes are semi-volatile organo-silicon compounds that can be converted to solid inorganic siliceous deposits (Silicon Dioxide SiO2). In gas engines they form a coating that can be very dangerous, with chemical and physical properties similar to those of glass, leading to the abrasion of gas motor surface. Additionally, the glassy residues are responsible for the inactivity of the surface of the catalytic system for the control of waste gas.

The manufacturers of gas engines recently introduced a limit value for silicon of 1 mg/l measured in the oil of the gas engine in order to prevent premature engine failure due to silicon-induced damages (Prabucki et al., 2001). At the present there is not a standard method for the elimination of siloxanes from biogas from anaerobic digestion or from landfill gas.

The main methods, which are used now are: freezing to -70°C (~ 99,3% efficiency), activated carbons (~ 99,1% efficiency) and solvent washing (~ 60,0% efficiency). The main advantages of these methods are the high costs. In the literature you can find that also microorganism can degrade organosiloxanes. Our intention is therefore to use the microorganism in a biofilter in order to develop a cost-effective cleaning system capable of eliminating the obstacles to widespread use of biogas in fuel cell.

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Im Stadtgut 2A
4407 Steyr - Gleink
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