Title: green coke
Long Title: IUPAC Gold Book - green coke
DOI: 10.1351/goldbook.G02697
Status: current

Definition
Green coke (raw coke) is the primary solid carbonization product from high boiling hydrocarbon fractions obtained at temperatures below \(900\ \rm{K}\). It contains a fraction of matter that can be released as volatiles during subsequent heat treatment at temperatures up to approximately \(1600\ \rm{K}\). This mass fraction, the so-called volatile matter, is in the case of green coke between 4 and 15 wt.%, but it depends also on the heating rate.

Note
Raw coke is an equivalent term to green coke although it is now less frequently used. The so-called volatile matter of green coke depends on temperature and time of coking, but also on the method for its determination.

Related Terms
- Raw coke: https://goldbook.iupac.org//terms/view/R05158
- carbonization: https://goldbook.iupac.org//terms/view/C00840
- coke: https://goldbook.iupac.org//terms/view/C01142
- coking: https://goldbook.iupac.org//terms/view/C01144
- mass fraction: https://goldbook.iupac.org//terms/view/M03722

Source
- PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 494 (https://doi.org/10.1351/pac199567030473)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/G02697/html
- json: https://goldbook.iupac.org/terms/view/G02697/json
- xml: https://goldbook.iupac.org/terms/view/G02697/xml

Citation: Citation: 'green coke' 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.G02697
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Accessed: 2026-06-20T10:18:44+00:00