{"term":{"id":"04697","title":"plug-flow","longtitle":"IUPAC Gold Book - plug-flow","doi":"10.1351\/goldbook.P04697","code":"P04697","status":"current","definitions":[{"id":1,"text":"A packed bed flow reactor is commonly called a fixed bed reactor and the term plug-flow is also used to indicate that no attempt is made to back-mix the reaction mixture as it passes through the catalyst bed.","contexts":[],"links":[{"term":"catalyst","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/C00876"},{"term":"flow reactor","url":"https:\/\/goldbook.iupac.org\/\/terms\/view\/F02443"}],"sources":["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 80 (https:\/\/doi.org\/10.1351\/pac197646010071)"]}],"altoutputs":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/P04697\/html","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/P04697\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/P04697\/plain"},"citation":"Citation: 'plug-flow' 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.P04697","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.","collection":"If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org .","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.","accessed":"2026-06-20T07:34:45+00:00"}}