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Proceedings Paper

Industrial Raman gas sensing for real-time system control
Author(s): M. Buric; J. Mullen; B. Chorpening; S. Woodruff
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Paper Abstract

Opportunities exist to improve on-line process control in energy applications with a fast, non-destructive measurement of gas composition. Here, we demonstrate a Raman sensing system which is capable of reporting the concentrations of numerous species simultaneously with sub-percent accuracy and sampling times below one-second for process control applications in energy or chemical production. The sensor is based upon a hollow-core capillary waveguide with a 300 micron bore with reflective thin-film metal and dielectric linings. The effect of using such a waveguide in a Raman process is to integrate Raman photons along the length of the sample-filled waveguide, thus permitting the acquisition of very large Raman signals for low-density gases in a short time. The resultant integrated Raman signals can then be used for quick and accurate analysis of a gaseous mixture. The sensor is currently being tested for energy applications such as coal gasification, turbine control, well-head monitoring for exploration or production, and non-conventional gas utilization. In conjunction with an ongoing commercialization effort, the researchers have recently completed two prototype instruments suitable for hazardous area operation and testing. Here, we report pre-commercialization testing of those field prototypes for control applications in gasification or similar processes. Results will be discussed with respect to accuracy, calibration requirements, gas sampling techniques, and possible control strategies of industrial significance.

Paper Details

Date Published: 11 June 2014
PDF: 15 pages
Proc. SPIE 9083, Micro- and Nanotechnology Sensors, Systems, and Applications VI, 90830U (11 June 2014); doi: 10.1117/12.2051241
Show Author Affiliations
M. Buric, National Energy Technology Lab. (United States)
J. Mullen, National Energy Technology Lab. (United States)
B. Chorpening, National Energy Technology Lab. (United States)
S. Woodruff, National Energy Technology Lab. (United States)

Published in SPIE Proceedings Vol. 9083:
Micro- and Nanotechnology Sensors, Systems, and Applications VI
Thomas George; M. Saif Islam; Achyut K. Dutta, Editor(s)

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