Extent of reaction in open systems with multiple heterogeneous reactions

American Institute of Chemical Engineers



The familiar batch concept of extent of reaction is reexamined for systems of reactions occurring in open systems. Because species concentrations change as a result of transport processes as well as reactions in open systems, the extent of reaction has been less useful in practice in these applications. It is shown that by defining the extent of the equivalent batch reaction and a second contribution to the extent of reaction due to the transport processes, it is possible to treat the description of the dynamics of flow through porous media accompanied by many chemical reactions in a uniform, concise manner. This approach tends to isolate the reaction terms among themselves and away from the model partial differential equations, thereby enabling treatment of large problems involving both equilibrium and kinetically controlled reactions. Implications on the number of coupled partial differential equations necessary to be solved and on numerical algorithms for solving such problems are discussed. Examples provided illustrate the theory applied to solute transport in groundwater flow.

Publication type Article
Publication Subtype Journal Article
Title Extent of reaction in open systems with multiple heterogeneous reactions
Series title American Institute of Chemical Engineers
DOI 10.1002/aic.690370507
Volume 37
Issue 5
Year Published 1991
Language English
Publisher Wiley
Contributing office(s) Toxic Substances Hydrology Program
Description 7 p.
First page 687
Last page 693
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