Compact QEPAS sensor for trace methane and ammonia detection in impure hydrogen

Autor:	B. A. Ferguson, Jonathan S. Wright, Brent Peters, Frank K. Tittel, Scott McWhorter, Lei Dong
Rok vydání:	2012
Předmět:	Materials science Physics and Astronomy (miscellaneous) Trace Amounts Hydrogen General Engineering Analytical chemistry General Physics and Astronomy chemistry.chemical_element Methane chemistry.chemical_compound Ammonia chemistry Torr Absorption (logic) Photoacoustic spectroscopy Water vapor
Zdroj:	Applied Physics B. 107:459-467
ISSN:	1432-0649 0946-2171
Popis:	A compact two-gas sensor based on quartz enhanced photoacoustic spectroscopy (QEPAS) was developed for trace methane and ammonia quantification in impure hydrogen. The sensor is equipped with a micro-resonator to confine the sound wave and enhance QEPAS signal. The normalized noise-equivalent absorption coefficients (1{sigma}) of 2.45 x 10{sup -8} cm{sup -1}W/{radical}Hz and 9.1 x 10{sup -9} cm{sup -1}W/{radical}Hz for CH{sub 4} detection at 200 Torr and NH{sub 3} detection at 50 Torr were demonstrated with the QEPAS sensor configuration, respectively. The influence of water vapor on the CH{sub 4} channel was also investigated.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::945e0d3a47850858ba06d9600ab7f2c9 https://doi.org/10.1007/s00340-012-4908-x Zobrazit plný text záznamu Plný text ve formátu PDF