Influences of Viscoelasticity and Streaming Potential on Surface Reaction Kinetics in Micro reactors

Document Type : Research Article

Authors

1 Chemical Engineering Department.Abadan Faculty of Petroleum Engineering. Petroleum University of Technology

2 Assistant Professor, University of Kurdistan

Abstract

The present study deals with investigating the influences of the streaming potential   and a non-linear rheology of the carrier fluid on mass transport and surface reactions in heterogeneous microreactors. To this end, the Phan-Thien and Tanner viscoelastic model is used to predict the non- linear behavior of the fluid. The governing equations are solved in a dimensionless form utilizing the finite-difference method for a non-uniform grid. The results show that the streaming potential effects are pronounced by increasing the ionic strength of the electrolyte and thickening the electric double layer. Upon magnifying these effects, the fluid velocity and, accordingly, the speed of analyte transfer to the downstream are lowered, thereby reducing the surface reaction rates. The streaming potential effects are so severe that may lead to a 100% increase in the saturation time at limiting conditions. Although the elasticity effects decrease the saturation time by increasing the fluid velocity near the wall, they are less important as compared to the streaming potential effects.

Keywords

Main Subjects

References

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Amirkabir Journal of Mechanical Engineering
Volume 52, Issue 4
July 2020
Pages 893-906

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