The development of tin(IV) oxide-based gas sensor for the detection of siloxane in biogas

Siloxanes are harmful contaminants present in biogas. When biogas is combusted in a combined heat and power (CHP) engine, the siloxane reacts with oxygen producing SiO2, SiO3 and micro-crystalline silica. Deposits of these species can become attached to the valves, cylinder walls, and the blades in turbines forming a thick, abrasive layer, which will reduce the efficiency and could potentially destroy the equipment. There are various siloxane detection and removal methods that are used in industry. The most common detection method is using gas chromatography (GC) combined with different detectors, but it is costly, complicates the process and requires skilled personnel. Developing a suitable, disposable and easy-use siloxane gas sensor would save significant time and money on industrial scale siloxane detection. [Continues.]