Development of Continuous Solvent Extraction Processes for Coal Derived Carbon Products

Kennel, Elliot B.; Biedler, Philip L.; Chen, Chong; Dadyburjor, Dady B.; Magean, Liviu; Stansberry, Peter G.; Stiller, Alfred H.; Zondlo, John W.

doi:10.2172/1029975

Cited by 1 publication

(1 citation statement)

References 32 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The process does not need additional solvent as it can be recycled, and the makeup solvent can be obtained from the coal itself. This patented process is described elsewhere [19][20][21] and is currently licensed to Penncara Energy. A commercial petroleum pitch from a leading vendor having a softening point of 174 • C (K174) was obtained as a comparison to the Synpitch.…”

Section: Methodsmentioning

confidence: 99%

Synthetic Pitch from Solvent Extraction of Coal as a Source for High-Quality Graphite

Gharpure

Wal

Pisupati

2023

View full text Add to dashboard Cite

This work evaluates the potential for obtaining graphitizable precursors from domestically available coal as a possible solution to the declining availability of high-quality precursors and projected rapid growth driven by demand for synthetic graphite in the US. The graphitizability of a coal-derived synthetic pitch (Synpitch) obtained by a novel solvent extraction process is compared with a commercially available petroleum pitch. The process outlined in this paper offers the advantages of lower temperature, pressure, and hydrogen addition requirement. An upgraded (higher H/C) aromatic pitch with low quinoline insoluble (QI) and ash content is obtained. The distinctions between the pitches have been characterized using Fourier transform infrared spectroscopy, nuclear magnetic resonance, and thermogravimetric analysis/differential scanning calorimetry. The pitches have been graphitized at 2500 °C and characterized by X-ray diffraction and transmission electron microscopy for graphitic quality assessment. The Synpitch showed larger crystallites (by over 50%) and markedly better nanostructure compared to the commercial pitch used in this study. The structural differences between the pitches are highlighted here to explain the significantly better graphitic quality of the Synpitch.

show abstract

Section: Methodsmentioning

confidence: 99%