coking

https://doi.org/10.1351/goldbook.C01144
Many reactions involving @H02889@ and particularly those run at higher temperatures lead to the deposition on the @C00876@ of high @M04000@ compounds of carbon and hydrogen which deactivate the @C00876@. This phenomenon is called coking or fouling. Catalysts so deactivated can often be regenerated.
Source:
PAC, 1976, 46, 71. (Manual of Symbols and Terminology for Physicochemical Quantities and Units - Appendix II. Definitions, Terminology and Symbols in Colloid and Surface Chemistry. Part II: Heterogeneous Catalysis) on page 84 [Terms] [Paper]