Title: semicoke
Long Title: IUPAC Gold Book - semicoke
DOI: 10.1351/goldbook.S05590
Status: current

Definition
A carbonaceous material intermediate between a fusible mesophase pitch and a non-deformable green coke produced by incomplete carbonization at temperatures between the onset of fusion (of coal, ca. \(620\ \rm{K}\)), and complete devolatilization. Semicoke still contains volatile matter, therefore.

Note
Semicoke may be conceived as covering a continuous range from coal that has not yet been fused to coke breeze. Semicoke can also be used as a filler in carbon mixtures.

Related Terms
- carbonization: https://goldbook.iupac.org//terms/view/C00840
- coal tar pitch: https://goldbook.iupac.org//terms/view/C01121
- coke breeze: https://goldbook.iupac.org//terms/view/C01143
- filler: https://goldbook.iupac.org//terms/view/F02363
- green coke: https://goldbook.iupac.org//terms/view/G02697
- mesophase pitch: https://goldbook.iupac.org//terms/view/M03850

Source
- PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 504 (https://doi.org/10.1351/pac199567030473)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/S05590/html
- json: https://goldbook.iupac.org/terms/view/S05590/json
- xml: https://goldbook.iupac.org/terms/view/S05590/xml

Citation: Citation: 'semicoke' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.S05590
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Accessed: 2026-07-26T14:19:12+00:00