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

被引：81
作者：
Dong, L. [1 ]
Wright, J. [2 ]
Peters, B. [2 ]
Ferguson, B. A. [2 ]
Tittel, F. K. [1 ]
McWhorter, S. [2 ]
机构：
[1] Rice Univ, Dept Elect & Comp Engn, Houston, TX 77005 USA
[2] Savannah River Natl Lab, Hydrogen Technol Res Lab, Aiken, SC 29808 USA
来源：
APPLIED PHYSICS B-LASERS AND OPTICS | 2012年 / 107卷 / 02期
基金：
美国国家科学基金会;
关键词：
ENHANCED PHOTOACOUSTIC-SPECTROSCOPY; LASER;
D O I：
10.1007/s00340-012-4908-x
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
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) of 2.45x10(-8) cm(-1) W/Hz and 9.1x10(-9) cm(-1) W/Hz for CH4 detection at 200 Torr and NH3 detection at 50 Torr were demonstrated with the QEPAS sensor configuration, respectively. The influence of water vapor on the CH4 channel was also investigated.
引用
收藏
页码：459 / 467
页数：9
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