Open AccessEvaluation of pitches and cokes from solvent-extracted coal materials
Author(s) -
E. R. McHenry
Publication year - 1996
Language(s) - English
Resource type - Reports
DOI - 10.2172/451287
Subject(s) - softening point , coal , solvent , nitrogen , toluene , carbon fibers , materials science , sulfur , coal tar , graphite , softening , tar (computing) , mineralogy , analytical chemistry (journal) , chemistry , chemical engineering , composite material , organic chemistry , metallurgy , engineering , composite number , computer science , programming language
Three initial coal-extracted (C-E) samples were received from the West Virginia University (WVU) Chemical Engineering Department. Two samples had been hydrogenated to obtain pitches that satisfy Theological requirements. One of the hydrogenated (HC-E) samples had been extracted by toluene to remove ash and higher molecular weight aromatic compounds. We were unable to measure the softening point and viscosity of the non-hydro treated solid extract sample, Positive characteristics in the HC-E materials were softening points of 113-119{degrees}C, low sulfur and ash. The oxygen and nitrogen content of the HC-E samples may limit future usage in premium carbon and graphite products. Coking values were similar to petroleum pitches. Laboratory anode testing indicates that in combination with standard coal-tar pitch, the HC-E material can be used as a binder pitch