Siloxanes are a class of man-made organosilicon compounds widely used in several industrial and household applications, such as pharmaceutics, and personal care products. The widespread use of these products has led to a significant increase of siloxanes in both wastewater and landfills. Therefore, biogases from the above sources contain siloxanes. The combustion of siloxane-containing biogases that produces abrasive micro-crystalline silica has caused serious damage, destruction, and reduced efficiency to engines, turbines, fuel cells and catalysts, so siloxanes removal is of great importance in biogas purity. However, there is a large number of competing compounds presenting in the biogases, including siloxanes, VOCs, H2S and other sulfur species. The physical adsorption of siloxanes becomes a difficult challenge for the effective recovery of energy from this renewable resource due to competitive adsorption dynamics.