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Infrared Absorption Coefficients for Certain Pollutant Gases

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Quantitative analysis of gas mixtures by infrared spectroscopy requires a knowledge of the absorption coefficients,: κν, as a function of optical path length and temperature. For the majority of pollutant gases, information is scarce or incomplete. The objective of this work was to determine absorption coefficients for CH4, C2H4, CO2, CO, SO2, NO2, NO, and H2S. Measurements were made at room temperature and elevated temperatures for certain wave lengths, and κν was determined over a very wide range of optical path length, x. The validity of the Bouguer-Beer law was confirmed for a limiting range of x, and for larger values of x, κν decreased and was correlated as a function of x and T.

Keywords: Infrared absorption coefficients; Pollutant gas ir absorption coefficients; Temperature effect on ir absorption coefficients

Document Type: Research Article


Affiliations: 1: Chemical Engineering Department, University of Houston, Houston, Texas 77004 2: Chemical Engineering Department, University of Houston, Houston, Texas 77004; present address: Chemical Engineering Department, University of Southwestern Louisiana, Lafayette, Louisiana 70501

Publication date: May 1, 1972

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