Numerical simulations of dead zone formation in the catalytic flow-through membrane reactor
Skrzypacz P. Chalkarova N. Golman B. Andreev V. Schieweck F.
September 2021Elsevier Ltd
Computers and Chemical Engineering
2021#152
The use of catalytic membranes in chemical reactor engineering has significantly improved the reactor performance. Therefore, mathematical modelling and numerical simulations of catalytic membrane reactors are important for optimal parameter design increasing the selectivity and yield of certain products in chemical reactions. In this paper, the mathematical model of the flow-through catalytic membrane reactor is based on coupled nonlinear convection-diffusion-reaction equations with temperature-dependent reaction rate constants. The series reactions in the reactor are characterized by the power-law kinetics of fractional order which until now has been rarely investigated in the literature. Under specific reaction and process conditions the reactant can be depleted and a dead-zone can be formed in the membrane reactor. The numerical simulation of this phenomenon requires special solvers. The key idea of this work is to construct an appropriate time-marching scheme for solving the steady-state model equations. The effects of parameters such as reaction order, Peclet number, and Thiele modulus on solution profiles and formation of dead-zones are studied numerically. The simulation results show how these parameters influence the appearance and size of the dead zone for the non-isothermal multi-reaction systems.
Catalytic membrane reactors , Convection , Dead zone , Power-law type kinetics , Time-marching scheme
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School of Sciences and Humanities, Nazarbayev University, 53 Kabanbay Batyr Ave., Nur-Sultan, 010000, Kazakhstan
School of Engineering and Digital Sciences, Nazarbayev University, 53 Kabanbay Batyr Ave., Nur-Sultan, 010000, Kazakhstan
Department of Heat Power Setups, Faculty of Energy and Electrical Engineering, Chuvash State University, Cheboksary, 428015, Russian Federation
Institut für Analysis und Numerik, Otto-von-Guericke-Universität Magdeburg, Postfach 4120, Magdeburg, D-39016, Germany
School of Sciences and Humanities
School of Engineering and Digital Sciences
Department of Heat Power Setups
Institut für Analysis und Numerik
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