A Technique for Extrapolating Absorption Coefficient Measurements to High Temperatures

Published

July 30, 2004

Author(s)

Stephen P. Fuss, K Wakatsuki, Anthony P. Hamins, Marc R. Nyden

Abstract

This study outlines the development of a technique that extends the range of molecular absorption coefficients to temperatures beyond those for which measurements are available. The technique utilizes a simplified expression for spectral absorption coefficient that is reduced to three fitting parameters and two independent variables. The technique was validated using CO, CO₂, and water vapor as test cases with data from the HITEMP molecular database. Results indicate that the difference between actual and predicted integrated absorption coefficients are less than 10 % at 1000 K when fits are performed at temperatures up to 700 K. New infrared absorption measurements for propane are presented for the temperature range 296 K to 602 K and the data are extrapolated to 1000 K.

Citation

Joint Meeting of the Combustion Institute

Volume

30

Issue

1

Pub Type

Journals

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Keywords

absorbance, absorption coefficient, FTIR, high temperature, HITEMP, propane

Citation

Fuss, S. , Wakatsuki, K. , Hamins, A. and Nyden, M. (2004), A Technique for Extrapolating Absorption Coefficient Measurements to High Temperatures, Joint Meeting of the Combustion Institute, [online], https://tsapps.nist.gov/publication/get_pdf.cfm?pub_id=861088 (Accessed October 27, 2025)