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	Reaktiv destillation	CSTR-modellen	UNIFAC
Ämnesområde	Tillämpad fysik	Tillämpad fysik	Tillämpad fysik
Familj	Process / pipeline	Process / pipeline	Process / pipeline
Ursprungsår	1995	1962	1975
Upphovsperson	Klaus Sundmacher	Octave Levenspiel	Aage Fredenslund, Russell Jones, John Prausnitz
Typ	Integrated reaction-separation process model	Mathematical model for continuous flow reactor	Activity coefficient model; predictive liquid-phase property method
Ursprungskälla	Sundmacher, K., & Kienle, A. (2003). Reactive Distillation: Status and Future Directions. Wiley-VCH. ISBN: 978-3-527-30623-9	Levenspiel, O. (1999). Chemical Reaction Engineering (3rd ed.). John Wiley & Sons. ISBN: 978-0-471-25424-9	Fredenslund, A., Jones, R. L., & Prausnitz, J. M. (1975). Group-contribution estimation of activity coefficients in nonideal liquid mixtures. AIChE Journal, 21(6), 1086-1099.
Alias	integrated distillation-reaction, reactive column, reaction with separation	ideal mixed reactor, back-mix reactor, CSTR	UNIFAC predictive model, UNIQUAC functional-group contribution
Närliggande	4	3	3
Sammanfattning	Reactive distillation couples reaction and separation in a single column, where reactants are separated from products continuously while simultaneously undergoing reaction on catalytic trays. Pioneered in the 1990s by Klaus Sundmacher and others, this process intensification technique dramatically reduces capital cost, energy consumption, and environmental impact for suitable reactions. It is now industrially proven for esterification, hydration, and transesterification processes.	The CSTR (Continuous Stirred-Tank Reactor) model describes the behavior of an ideal mixed reactor where fresh feed is continuously added, products are withdrawn, and contents are kept uniform by vigorous stirring. This fundamental model, formalized by Octave Levenspiel in the 1960s, is widely used to design and scale batch and continuous processes. Despite its simplicity, it captures essential dynamics of industrial reactors and is the baseline for process control and optimization.	UNIFAC (Universal Functional-group Activity Coefficient) is a predictive model for liquid-phase activity coefficients of multicomponent mixtures. Developed by Fredenslund, Jones, and Prausnitz in 1975, it decomposes molecules into functional groups and uses group interaction parameters to estimate non-ideal behavior. UNIFAC is revolutionary because it can predict phase equilibria for mixtures never experimentally measured, making it invaluable for process design and chemical engineering.