Coalification of lignin to form vitrinite: A new structural template based on an helical structure
Conference
·
OSTI ID:254671
- Pennsylvania State Univ., University Park, PA (United States)
- Sandia National Lab., Albuquerque, NM (United States)
The structural evolution of vitrinite has been previously studied in our group through detailed characterization of coalified wood which spans the entire coalification range. The use of coalified logs was demonstrated to be especially useful as it removes the superposed problem of maceral scale heterogenieties from the problem of identifying fundamental transformations which delineate the coal`s chemical structural evolution. The net result of these detailed studies using {sup 13}C NMR and pyrolysis/gas chromatography/mass spectrometric (py/gc/ms) methods is the identification of several key chemical structural transformations which typify the coalification of woody material into high volatile bituminous coal. By comparisons of the chemical compositions of wood at various stages of coalification, one can infer specific reactions responsible for coalification. The focus of this paper is to review our current understanding of the evidence for these aforementioned chemical transformations and to present these reactions within the context of a new three-dimensional helical model that has been developed for lignin.
- OSTI ID:
- 254671
- Report Number(s):
- CONF-940813--
- Country of Publication:
- United States
- Language:
- English
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