Dehydration and upgrading of peat and lignite

Technical Report ·

OSTI ID:6993728

Terres, E

Peat, lignite, and coking of ''peat coal'' and upgraded lignite were three subjects which were discussed in this report. The first part talked about percentage of water and different forms of existence of water in peat. Earlier treatments for peat included using superheated steam at 200/sup 0/C to coagulate the peat colloids, using both superheated steam and compression up to several thousand atmospheres, and Count Schwerin's electrophoretic process; these were not successful. The method studied by Terres, which made the product called ''peat-coal'', was described, with a table of typical changes in elements during the treatment, and a conclusion which said that 65% of the original dry peat was recovered as peat-coal and the heat of combustion for dry peat was 9,540 Btu/lb, but of the peat coal 13,160 Btu/lb. In the end of this part, the economic importance of an inexpensive method of dehydration of peat and the peat-coal was discussed. The second part talked about percentage of water in lignite, dehydration and upgrading process which was the same as that for peat, and a table which showed the changes of elements during the treatment. The conclusion which said that 90% of the heat of combustion of the dry lignite was recovered in the upgraded product and the positive heat of decarboxylation reaction varied between 886 and 1,270 Btu/lb of the dry lignite was given in this part. The third part of the report was about chemical compositions and properties of hand-pressed peat coal briquettes and lignite briquettes.

• Research Organization: Texas A and M Univ., College Station (USA)
• OSTI ID: 6993728
• Report Number(s): TOM-B8-32
• Country of Publication: United States
• Language: English

Related Subjects

01 COAL, LIGNITE, AND PEAT
010400* -- Coal
Lignite
& Peat-- Processing
010600 -- Coal
Lignite
& Peat-- Properties & Composition
BRIQUETS
BROWN COAL
CARBONACEOUS MATERIALS
CARBONIZATION
CHEMICAL COMPOSITION
CHEMICAL PROPERTIES
CHEMICAL REACTION YIELD
CHEMICAL REACTIONS
COAL
COKE
COKING
COMBUSTION HEAT
DATA COMPILATION
DECOMPOSITION
DEHYDRATION
ECONOMICS
EFFICIENCY
ENERGY
ENERGY SOURCES
ENTHALPY
EVALUATION
FOSSIL FUELS
FUELS
HEAT
HIGH PRESSURE
HIGH TEMPERATURE
INFORMATION
LIGNITE
PEAT
PHYSICAL PROPERTIES
PROCESSING
PRODUCTION
REACTION HEAT
SOLID FUELS
STEAM
TABLES
THERMAL EFFICIENCY
THERMODYNAMIC PROPERTIES
YIELDS