Title: space velocity
Long Title: IUPAC Gold Book - space velocity
DOI: 10.1351/goldbook.S05779
Status: current

Definition
Defined as \(v_{m}\), \(v_{v}\), and \(v_{a}\) where the \(v_{i}\)s represent the rate of feed of the given reactant fed per unit mass, volume or surface area of the catalyst.

Related Term
- catalyst: https://goldbook.iupac.org//terms/view/C00876

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 82 (https://doi.org/10.1351/pac197646010071)

Other Outputs
- html: https://goldbook.iupac.org/terms/view/S05779/html
- json: https://goldbook.iupac.org/terms/view/S05779/json
- xml: https://goldbook.iupac.org/terms/view/S05779/xml

Citation: Citation: 'space velocity' 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.S05779
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Accessed: 2026-08-06T00:19:42+00:00