Ion transport membrane reactors for oxy-combustion – Part I: intermediate-fidelity modeling

Mancini, N. D.; Mitsos, Alexander

doi:10.1016/j.energy.2011.05.023

Cited by 61 publications

(46 citation statements)

References 35 publications

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“…As the percentage of CH 4 in the sweep gas changes from 100% to 10%, the counter-current regime results in permeation rates that are 6.62-12.75% higher than those of the co-current regime. Manccini and Mitsos [39,40] have developed a block box model for modeling an ITM reactor and obtained similar results, which showed that the counter-current regime is more viable than the co-current.…”

Section: Resultsmentioning

confidence: 84%

Modeling of ion transport reactor for oxy-fuel combustion

Farooqui

Habib

Badr

et al. 2012

Int. J. Energy Res.

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SUMMARY This paper aims at investigating the performance of a cylindrical ion transport reactor designed for oxy‐fuel combustion. The cylindrical reactor walls are made of dense, nonporous, mixed‐conducting ceramic membranes that only allow oxygen permeation from the outside air into the combustion chamber. The sweep gas (CO2 and CH4) enters the reactor from one side and mixes with the oxygen permeate, and the products are discharged from the other side. The process of oxygen permeation through the reactor walls is influenced by the flow condition and composition of air at the feed side (inlet air side) and the gas mixture at the permeate side (sweep gas side). The modeling of the flow process is based on the numerical solution of the conservation equations of mass, momentum, energy, and species in the axisymmetric flow domain. The membrane is modeled as a selective layer in which the oxygen permeation depends on the prevailing temperatures as well as the oxygen partial pressure at both sides of the membrane. The CFD calculations were carried out using fluent 12.1 (ANSYS, Inc., Canonsburg, PA, USA), whereas the mass transfer of oxygen through the membrane is modeled by a set of user defined functions. The model results were validated against previous experimental data, and the comparison showed a good agreement. The study focused on the effect of oxygen partial pressure and temperature on the resulting combustion zones inside the reactor for the two cases of co‐current and counter‐current flow regimes. The results indicated that the oxygen to fuel mass ratio increases as the percentage of CO2 increases in the inflow sweep gas for both co‐current and counter‐current flows. The obtained sweep mixture ratio (CO2/CH4) of 24 is found within the stoichiometric limit over most of the reactor length in the co‐current configuration, whereas the sweep mixture ratio of 15.67 is found in the counter‐current configuration owing to the high O2 permeation. Copyright © 2012 John Wiley & Sons, Ltd.

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Section: Resultsmentioning

confidence: 84%

Modeling of ion transport reactor for oxy-fuel combustion

Farooqui

Habib

Badr

et al. 2012

Int. J. Energy Res.

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“…Oxygen separation in an ITM system consists of many distinct physical processes including complex electrochemical and thermo-chemical reactions along with conventional heat and mass transfer. The dependence of ITM performance on power cycle operating conditions and system integration schemes must be captured effectively in order to carry out meaningful process flow and optimization studies [6]. The Air Separation units (ASU) which uses cryogenic fractionation process to separate oxygen from air may alone consume about 13% of the power plant output [7].…”

Section: Introductionmentioning

confidence: 99%

Modeling of a combined ion transport and porous membrane reactor for oxy-combustion

Habib

Ahmed

Ben‐Mansour

et al. 2013

Journal of Membrane Science

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“…The optimization resulted in considerable improvements in the efficiency and emissions of the power plant. Mancini and Mitsos [28,29] performed a detailed optimization study of a membrane-based oxy-combustion power plant. They came up with a design that can replace the conventional gas turbine power plant.…”

Section: Introductionmentioning

confidence: 99%