Term: petroleum coke https://doi.org/10.1351/goldbook.P04522 Definition: A carbonization product of high-boiling hydrocarbon fractions obtained in petroleum processing (heavy residues). It is the general term for all special petroleum coke products such as green, calcined and needle petroleum coke. Note: High-boiling hydrocarbon fractions (heavy residues) used as feedstock for petroleum @C01142@ are residues from distillation (atmospheric pressure, vacuum) or @C01387@ (e.g. thermal, catalytic, steam-based) processes. The nature of feedstock has a decisive influence on the graphitizability of the @C00774@. Related Terms: 1) coke (http://doi.org/10.1351/goldbook.C01142). 2) cracking (http://doi.org/10.1351/goldbook.C01387). 3) calcined coke (http://doi.org/10.1351/goldbook.C00774). 4) carbonization (http://doi.org/10.1351/goldbook.C00840). 5) green (http://doi.org/10.1351/goldbook.G02697). 6) needle (http://doi.org/10.1351/goldbook.N04095-1). 7) coke (http://doi.org/10.1351/goldbook.N04095-2). Source: PAC, 1995, 67, 473. 'Recommended terminology for the description of carbon as a solid (IUPAC Recommendations 1995)' on page 499 (https://doi.org/10.1351/pac199567030473) Citation: 'petroleum coke' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. https://doi.org/10.1351/goldbook.P04522 License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using.