Field measurements of chemical emission sources by open path Fourier Transform infrared spectroscopes with a two-dimensional searching model
Open Path Fourier Transform Infrared (OP-FTIR) spectroscopy can promptly measure numerous chemicals, which makes this system more competitive and efficient than conventional analytical methods. However, spatial variations of airborne concentrations along the beam path are difficult to estimate, and identification of emission sources is therefore troublesome. Thus, a two-dimensional searching model was developed. Two sets of OP-FTIR spectrometers were utilized to measure several horizontal and vertical beam paths to thoroughly cover a plant site. Scans of each beam path were taken continuously for at least 15 minutes to collect representative data for continuous emission sources. The crisscross concentrations must be identical as two beam paths intercept with each other, and they were calculated in accordance with average concentration and the lengths of the beam paths. Source emission quantities and wind speeds were assumed to be constant during measurement. By using meteorological adjustment, major emission sources were easily identified from two-dimensional concentration distribution contour maps through examining the up-wind locations of crisscrosses. The major emission sources were evaluated by using point source monitoring methods. This model has been applied in a petrochemical plant, and the hit of searching within the acceptable variation range of emission sources was 100%. The average time required to locate the major emission sources in a 105,000m{sup 2} plant site was approximately 3.25 hours.
- Research Organization:
- Industrial Technology Research Inst., Chutung Hsinchu (TW)
- OSTI ID:
- 20006555
- Report Number(s):
- CONF-990608-; TRN: IM200008%%162
- Resource Relation:
- Conference: Air and Waste 92nd Annual Meeting and Exhibition, St. Louis, MO (US), 06/20/1999--06/24/1999; Other Information: 1 CD-ROM. Operating Systems: Windows 3.1, '95, '98 and NT; Macintosh; and UNIX; PBD: 1999; Related Information: In: Air and Waste 92nd annual meeting and exhibition proceedings, [9500] pages.
- Country of Publication:
- United States
- Language:
- English
Similar Records
Project OPTEX: Field study at a petrochemical facility to assess optical remote sensing and dispersion modeling techniques
Development of quality assurance procedures in open-path FTIR monitoring