Development of on-line FTIR spectroscopy for siloxane detection in biogas to enhance carbon contactor management.Activated carbon filters are used to limit engine damage by siloxanes when biogas is utilised to provide electricity.  In this study, on-line Fourier Transform Infrared (FTIR) spectroscopy was developed to measure siloxane concentration in real biogas both upstream (86.1-157.5mg m(-3)) and downstream (2.2-4.3mg m(-3)) of activated carbon filters.  The FTIR provided reasonable precision upstream of the carbon vessel with a root mean square error of 10% using partial least squares analysis.  Importantly, a limit of detection of 3.2mg m(-3) was identified which is below the recommended siloxane limit and evidences the applicability of on-line FTIR for this application.
FTIR
In this study, on-line Fourier Transform Infrared (FTIR) spectroscopy was developed to measure siloxane concentration in real biogas both upstream (86.1-157.5mg m(-3)) and downstream (2.2-4.3mg m(-3)) of activated carbon filters. 
Fourier Transform Infrared