Biogas, a product of the anaerobic decomposition of organic matter contained in wastewater and it is an important renewable energy source. The presence of traces of volatile methyl siloxanes (VMS) in biogas produces irreversible damages to devices used to generate electrical or thermal energy from biogas such as engines and turbines. VMS are highly recalcitrant compounds, their high hydrophobicity and the consequent mass transfer limitations between the gas and liquid phases is the main drawback for VMS removal via biotechnological processes. In the present work, we experimentally determined the Henry’s law constant for the most common siloxanes found in biogas: octamethylcyclotetrasiloxane (D4) and decamethylcyclopentasiloxane (D5). Despite being indispensable for the design of biological systems for their elimination, the Henry’s law constant (H) values ​​reported in the literature for D4 and D5 are scarce and highly inconsistent among them. Likewise, there is a lack of information on the solubility of VMS in liquid solvents that can be used for enhancing the biological removal performance of VMS, such as silicone oil. Therefore, the air/silicone oil partition coefficient (K) was also determined experimentally for D4 and D5. Both parameters H and K are of paramount relevance for the design and optimization of biological VMS removal systems. 

https://zoom.us/j/97326842828?pwd=cXFmNUw3eHFLamxPUFRmMTd2QWdCQT09