Localization and Quantification of Trace-gas Fugitive Emissions Using a Portable Optical Spectrometer

Conference · Sun Apr 15 04:00:00 EDT 2018

DOI:https://doi.org/10.1117/12.2305174· OSTI ID:1433075

Zhang, Eric ^[1]; Teng, Chu ^[2]; van Kessel, Theodore ^[3]; Klein, Levente ^[3]; Muralidhar, Ramachandran ^[3]; Xiong, Chi ^[3]; Martin, Yves ^[3]; Orcutt, Jason ^[3]; Khater, Marwan ^[3]; Schares, Laurent ^[3]; Barwicz, Tymon ^[3]; Marchack, Nathan ^[3]; Kamlapurkar, Swetha ^[3]; Engelmann, Sebastian ^[3]; Wysocki, Gerard ^[2]; Sosa, Norma ^[3]; Green, William ^[3]

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1. IBM, Yorktown Heights, NY (United States). Thomas J. Watson Research Center; IBM Research
2. Princeton Univ., NJ (United States). Electrical Engineering Dept.
3. IBM, Yorktown Heights, NY (United States). Thomas J. Watson Research Center

We present a portable optical spectrometer for fugitive emissions monitoring of methane (CH4). The sensor operation is based on tunable diode laser absorption spectroscopy (TDLAS), using a 5 cm open path design, and targets the 2ν3 R(4) CH4 transition at 6057.1 cm-1 (1651 nm) to avoid cross-talk with common interfering atmospheric constituents. Sensitivity analysis indicates a normalized precision of 2.0 ppmv∙Hz-1/2, corresponding to a noise-equivalent absorption (NEA) of 4.4×10-6 Hz-1/2 and minimum detectible absorption (MDA) coefficient of αmin = 8.8×10-7 cm-1∙Hz-1/2. Our TDLAS sensor is deployed at the Methane Emissions Technology Evaluation Center (METEC) at Colorado State University (CSU) for initial demonstration of single-sensor based source localization and quantification of CH4 fugitive emissions. The TDLAS sensor is concurrently deployed with a customized chemi-resistive metal-oxide (MOX) sensor for accuracy benchmarking, demonstrating good visual correlation of the concentration time-series. Initial angle-of-arrival (AOA) results will be shown, and development towards source magnitude estimation will be described.

• Research Organization: IBM Research
• Sponsoring Organization: USDOE Advanced Research Projects Agency - Energy (ARPA-E)
• DOE Contract Number: AR0000540
• OSTI ID: 1433075
• Report Number(s): DOE-IBM-0000540-13
• Country of Publication: United States
• Language: English

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