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Tuneable diode laser gas analyser for methane measurements on a large scale solid oxide fuel cell

Lengden, Michael and Cunningham, Robert and Johnstone, Walter (2011) Tuneable diode laser gas analyser for methane measurements on a large scale solid oxide fuel cell. Journal of Power Sources, 196 (20). pp. 8406-8408. ISSN 0378-7753

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Abstract

A new in-line, real time gas analyser is described that uses tuneable diode laser spectroscopy (TDLS) for the measurement of methane in solid oxide fuel cells. The sensor has been tested on an operating solid oxide fuel cell (SOFC) in order to prove the fast response and accuracy of the technology as compared to a gas chromatograph. The advantages of using a TDLS system for process control in a large-scale, distributed power SOFC unit are described. In future work, the addition of new laser sources and wavelength modulation will allow the simultaneous measurement of methane, water vapour, carbon-dioxide and carbon-monoxide concentrations.