Comparative study of peat and lignite on the basis of proximate and ultimate analysis
Ultimate and proximate analytical data was used as the basis for comparisons of selected United States peats and North Dakota lignites that have formed under a variety of depositional environments, in order to better understand the transitional relationships involved in the transformation of peat to lignite. A ternary diagram of the bond-equivalents of C, O, and H can be used to represent relationships among complex chemical compounds. This method was initially developed for Australian brown coals. The rationale for adopting this method was the usefulness of the reaction trajectories in identifying the dominating chemical changes in coalification. The mass percentage of nitrogen and organic sulfur are added to the mass percentage of oxygen. The bond equivalence data implies that a relationship exists between peat and lignite by the cellulose present and the degree of decarboxylation. It has been shown elsewhere that the carboxyl content of Minnesota peat and Yalloun brown coal are greater than that of a North Dakota lignite. Collateral research at UNDERC has found virtually no cellulose in North Dakota lignite, but 5% cellulose (maf) in Minnesota peat. This relationship implies that decellulosation and decarboxylation reactions represented on the ternary diagram are occurring in the diagenesis of peat to lignite. The data further indicates that Australian brown coals are indeed intermediate in coalification between United States peat and North Dakota lignite.
- Research Organization:
- Univ. of North Dakota Energy Research Center, Grand Forks (USA)
- OSTI ID:
- 6445625
- Report Number(s):
- CONF-8510489-
- Journal Information:
- Geol. Soc. Am., Abstr. Programs; (United States), Vol. 17; Conference: 98. annual meeting of the Geological Society of America, Orlando, FL, USA, 28 Oct 1985
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
COAL DEPOSITS
CHEMICAL COMPOSITION
NORTH DAKOTA
PEAT
COALIFICATION
AUSTRALIA
CELLULOSE
CHEMICAL ANALYSIS
CHEMICAL BONDS
COMPARATIVE EVALUATIONS
DECARBOXYLATION
DEPOSITION
DIAGENESIS
LIGNITE
MINNESOTA
AUSTRALASIA
BROWN COAL
CARBOHYDRATES
CARBONACEOUS MATERIALS
CHEMICAL REACTIONS
COAL
ENERGY SOURCES
FEDERAL REGION V
FEDERAL REGION VIII
FOSSIL FUELS
FUELS
GEOLOGIC DEPOSITS
MATERIALS
MINERAL RESOURCES
NORTH AMERICA
ORGANIC COMPOUNDS
ORGANIC MATTER
POLYSACCHARIDES
RESOURCES
SACCHARIDES
USA
011000* - Coal
Lignite
& Peat- Reserves
Geology
& Exploration