Combination of Diffuse Reflectance FT-IR Spectroscopy, Fourier Self-Deconvolution and Curve-Fitting for the Investigation of Reacting Coals
Coal is a remarkably complex mixture of polymeric materials with mineral inclusions. The organic macerals are believed to consist of a skeletal structure which is composed of clusters of condensed aromatic and hydroaromatic nuclei, joined by methylene, polymethylene, or ether linkages. This lattice is of high molecular weight and is believed to contain smaller, more hydrogen rich, molecules in the pores. The infrared spectrum of most coals is relatively featureless, consisting of several broad bands assignable to common functional groups such as CH2, CH3, C=0, etc., but giving little detailed information on the precise molecular environment of each group. Several workers [1–4] have shown that overlapping bands in coal spectra may be resolved by Fourier selfdeconvolution . We have assigned many of these features to functional groups in specific environments.
KeywordsPolymethylene Convolution Tral Deconvolution Methoxy
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- 1.P. R. Griffiths, S-H. Wang, P. W. Yang, D. E. Henry and I. M. Hamadeh, ACS Div. Fuel Chem. Preprints, 28, 27 (1983).Google Scholar
- 2.E. L. Fuller, Jr., N. R. Smyrl, R. W. Smithwick and C. S. Daw, ACS Div. Fuel Chem. Preprints, 28, 44 (1983).Google Scholar
- 6.S. -H. Wang, Ph. D. Dissertation, Ohio University, Athens, Ohio (1984).Google Scholar
- 7.P. C. Gillette, D. Kormos, M. K. Antoon and J. L. Koenig,’Selected Computer Programs with Application to Infrared Spectroscopy’, Digilab Users Group, Cambridge, MA (1979).Google Scholar
- 8.P. C. Painter, R. W. Snyder, M. Starsinic, M. M. Coleman, D. W. Kuehn and A. Davis, in ‘Coal and Coal Products: Analytical Characterization Techniques’, E. L. Fuller, Jr. , Ed. , Am. Chem. Soc. Symp. Ser. 205 (1982) p. 47.Google Scholar
- 13.a)P. R. Solomon, ACS Div. Fuel Chem. Preprints, 24, 184 (1979).Google Scholar
- b).Ibid. , in ‘Coal and Coal Products: Analytical Characterization Techniques’, E. L. Fuller, Jr. , Ed. , Am. Chem. Soc. Symp. Ser. 205 (1982) p. 77.Google Scholar