Biogas/Biomethane Quality and Requirements for Combined Heat and Power (CHP) Units/Gas Grids with a Special Focus on Siloxanes-a Short Review

The presence of siloxanes in biogas and biomethane is a major barrier to use them as renewable energy sources Combined Heat Power (CHP) units national grids systems. Siloxanes the shape methyl (incl. L2, L3, L4, D3, D4, D5, D6), Trimethylsilanol (TMSOH), well other contaminants such H2S, NH3, relative Humidity (rH), halogenated compounds (including organic chlorine fluorine), Volatile Organic Compounds (VOCs) presented upgraded quality are detrimental engines, turbines gas grids, therefore it necessary remove before its high-value utilization. Under oxidation, process converted into microcrystalline silicon dioxide (SiO2) deposits that can shorten lifetime engine affect grids. review presents actual requirements context their utilization CHP Moreover, methods removal based on adsorption, absorption, cryogenic condensation, membranes, biofiltration described.