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Development of carbon products from low-rank coals.

DE2001786841

Publication Date	2001
Personal Author	Olson, E. S.
Page Count	13
Abstract	The goal of this project is to facilitate the production of carbon fibers from low-rank coal (LRC) tars. To this end, the effect of demineralization on the tar yields and composition was investigated using high-sodium and high-calcium lignites commonly mined in North Dakota. These coals were demineralized by ion exchange with ammonium acetate and by cation dissolution with nitric acid. Two types of thermal processing were investigated for obtaining suitable precursors for pitch and fiber production. Initially, tars were produced by simple pyrolysis of the set of samples at 650 C. Since these experiments produced little usable material form any of the samples, the coals were heated at moderate temperatures (380 and 400 C) in tetralin solvent to form and extract the plastic material (metaplast) that forms at these temperatures.
Keywords	Carbon Coal extracts Coal liquification Production Coal tar Lignites Thermal processing Carbon fibers Solvents Chemical analysis Precursors
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	National Energy Technology Lab., Pittsburgh, PA.; Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200201
Contract Number	FC26-98FT40320

Development of carbon products from low-rank coals.

Development of carbon products from low-rank coals.
DE2001786841

Publication Date	2001
Personal Author	Olson, E. S.
Page Count	13
Abstract	The goal of this project is to facilitate the production of carbon fibers from low-rank coal (LRC) tars. To this end, the effect of demineralization on the tar yields and composition was investigated using high-sodium and high-calcium lignites commonly mined in North Dakota. These coals were demineralized by ion exchange with ammonium acetate and by cation dissolution with nitric acid. Two types of thermal processing were investigated for obtaining suitable precursors for pitch and fiber production. Initially, tars were produced by simple pyrolysis of the set of samples at 650 C. Since these experiments produced little usable material form any of the samples, the coals were heated at moderate temperatures (380 and 400 C) in tetralin solvent to form and extract the plastic material (metaplast) that forms at these temperatures.
Keywords	Carbon Coal extracts Coal liquification Production Coal tar Lignites Thermal processing Carbon fibers Solvents Chemical analysis Precursors
Source Agency	Technical Information Center Oak Ridge Tennessee
Corporate Authors	National Energy Technology Lab., Pittsburgh, PA.; Department of Energy, Washington, DC.
Document Type	Technical Report
NTIS Issue Number	200201
Contract Number	FC26-98FT40320