The Experts below are selected from a list of 159 Experts worldwide ranked by ideXlab platform
Ahmed F Ghoniem - One of the best experts on this subject based on the ideXlab platform.
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measuring the oxygen profile and permeation flux across an ion transport la0 9ca0 1feo3 δ membrane and the development and validation of a multistep Surface exchange model
Journal of Membrane Science, 2014Co-Authors: Anton Hunt, Georgios Dimitrakopoulos, Patrick Kirchen, Ahmed F GhoniemAbstract:Abstract A novel ion transport membrane laboratory reactor is introduced which can sample gases at the La 0.9 Ca 0.1 FeO 3 − δ membrane Surface at high temperature flux conditions. Experimental data (spatial profiles and operating condition sensitivity) is presented and used to validate detailed 1D and 2D numerical models under inert (CO2 Sweep) operating conditions; the numerical models account for mass transfer resistances to the membrane Surface. Bypassing the mass transfer resistances experimentally allows for direct parameterization of a three resistance oxygen flux model; a unique solution method based on bespoke experimental datasets to find Surface exchange reaction rate constants is demonstrated. Membrane operating regimes and oxygen off-stoichiometric coefficients can thus be determined highlighting the importance of Surface exchange studies and the obvious requirement to reduce Sweep Surface P O 2 through oxyfuel reaction integration and/or flow field adjustments. A more complex first-order flux model is also proposed and tested incorporating the Surface oxygen ion concentrations in the Surface exchange reactions; this is found to give similar material parameters to the simpler zero-order model studied in the literature for this particular case.
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Measuring the oxygen profile and permeation flux across an ion transport (La0.9Ca0.1FeO3−δ) membrane and the development and validation of a multistep Surface exchange model
Journal of Membrane Science, 2014Co-Authors: Anton Hunt, Georgios Dimitrakopoulos, Patrick Kirchen, Ahmed F GhoniemAbstract:A novel ion transport membrane laboratory reactor is introduced which can sample gases at the La0.9Ca0.1FeO3 -δ membrane Surface at high temperature flux conditions. Experimental data (spatial profiles and operating condition sensitivity) is presented and used to validate detailed 1D and 2D numerical models under inert (CO2 Sweep) operating conditions; the numerical models account for mass transfer resistances to the membrane Surface. Bypassing the mass transfer resistances experimentally allows for direct parameterization of a three resistance oxygen flux model; a unique solution method based on bespoke experimental datasets to find Surface exchange reaction rate constants is demonstrated. Membrane operating regimes and oxygen off-stoichiometric coefficients can thus be determined highlighting the importance of Surface exchange studies and the obvious requirement to reduce Sweep Surface P O2 through oxyfuel reaction integration and/or flow field adjustments. A more complex first-order flux model is also proposed and tested incorporating the Surface oxygen ion concentrations in the Surface exchange reactions; this is found to give similar material parameters to the simpler zero-order model studied in the literature for this particular case. © 2014 Elsevier B.V
Anton Hunt - One of the best experts on this subject based on the ideXlab platform.
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measuring the oxygen profile and permeation flux across an ion transport la0 9ca0 1feo3 δ membrane and the development and validation of a multistep Surface exchange model
Journal of Membrane Science, 2014Co-Authors: Anton Hunt, Georgios Dimitrakopoulos, Patrick Kirchen, Ahmed F GhoniemAbstract:Abstract A novel ion transport membrane laboratory reactor is introduced which can sample gases at the La 0.9 Ca 0.1 FeO 3 − δ membrane Surface at high temperature flux conditions. Experimental data (spatial profiles and operating condition sensitivity) is presented and used to validate detailed 1D and 2D numerical models under inert (CO2 Sweep) operating conditions; the numerical models account for mass transfer resistances to the membrane Surface. Bypassing the mass transfer resistances experimentally allows for direct parameterization of a three resistance oxygen flux model; a unique solution method based on bespoke experimental datasets to find Surface exchange reaction rate constants is demonstrated. Membrane operating regimes and oxygen off-stoichiometric coefficients can thus be determined highlighting the importance of Surface exchange studies and the obvious requirement to reduce Sweep Surface P O 2 through oxyfuel reaction integration and/or flow field adjustments. A more complex first-order flux model is also proposed and tested incorporating the Surface oxygen ion concentrations in the Surface exchange reactions; this is found to give similar material parameters to the simpler zero-order model studied in the literature for this particular case.
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Measuring the oxygen profile and permeation flux across an ion transport (La0.9Ca0.1FeO3−δ) membrane and the development and validation of a multistep Surface exchange model
Journal of Membrane Science, 2014Co-Authors: Anton Hunt, Georgios Dimitrakopoulos, Patrick Kirchen, Ahmed F GhoniemAbstract:A novel ion transport membrane laboratory reactor is introduced which can sample gases at the La0.9Ca0.1FeO3 -δ membrane Surface at high temperature flux conditions. Experimental data (spatial profiles and operating condition sensitivity) is presented and used to validate detailed 1D and 2D numerical models under inert (CO2 Sweep) operating conditions; the numerical models account for mass transfer resistances to the membrane Surface. Bypassing the mass transfer resistances experimentally allows for direct parameterization of a three resistance oxygen flux model; a unique solution method based on bespoke experimental datasets to find Surface exchange reaction rate constants is demonstrated. Membrane operating regimes and oxygen off-stoichiometric coefficients can thus be determined highlighting the importance of Surface exchange studies and the obvious requirement to reduce Sweep Surface P O2 through oxyfuel reaction integration and/or flow field adjustments. A more complex first-order flux model is also proposed and tested incorporating the Surface oxygen ion concentrations in the Surface exchange reactions; this is found to give similar material parameters to the simpler zero-order model studied in the literature for this particular case. © 2014 Elsevier B.V
Ronda Venkateswarlu - One of the best experts on this subject based on the ideXlab platform.
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ICPR (4) - Coplanar light Sweep-Surface supported uncalibrated photometric stereo
2004Co-Authors: Hui Kong, Eam-khwang Teoh, Jian-gang Wang, Ronda VenkateswarluAbstract:In lambertian uncalibrated photometric stereo (VPS), the object Surface albedo and normals, the lighting directions and intensities are determined up to an arbitrary invertible matrix. In this paper, a novel method is proposed to reduce such an ambiguity. With the support of a coplanar light Sweep-Surface (CLSS), some key normals are determined relative to a fiducial normal which is estimated by the CLSS. Thus the arbitrary transformation is reduced to invertible matrix up to a rotation and a scale. The rotation can be solved by controlling the direction of camera, the resulting ambiguity transformation can be finally determined up to a global scale.
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coplanar light Sweep Surface supported uncalibrated photometric stereo
International Conference on Pattern Recognition, 2004Co-Authors: Hui Kong, Eam-khwang Teoh, Jian-gang Wang, Ronda VenkateswarluAbstract:In lambertian uncalibrated photometric stereo (VPS), the object Surface albedo and normals, the lighting directions and intensities are determined up to an arbitrary invertible matrix. In this paper, a novel method is proposed to reduce such an ambiguity. With the support of a coplanar light Sweep-Surface (CLSS), some key normals are determined relative to a fiducial normal which is estimated by the CLSS. Thus the arbitrary transformation is reduced to invertible matrix up to a rotation and a scale. The rotation can be solved by controlling the direction of camera, the resulting ambiguity transformation can be finally determined up to a global scale.
Patrick Kirchen - One of the best experts on this subject based on the ideXlab platform.
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measuring the oxygen profile and permeation flux across an ion transport la0 9ca0 1feo3 δ membrane and the development and validation of a multistep Surface exchange model
Journal of Membrane Science, 2014Co-Authors: Anton Hunt, Georgios Dimitrakopoulos, Patrick Kirchen, Ahmed F GhoniemAbstract:Abstract A novel ion transport membrane laboratory reactor is introduced which can sample gases at the La 0.9 Ca 0.1 FeO 3 − δ membrane Surface at high temperature flux conditions. Experimental data (spatial profiles and operating condition sensitivity) is presented and used to validate detailed 1D and 2D numerical models under inert (CO2 Sweep) operating conditions; the numerical models account for mass transfer resistances to the membrane Surface. Bypassing the mass transfer resistances experimentally allows for direct parameterization of a three resistance oxygen flux model; a unique solution method based on bespoke experimental datasets to find Surface exchange reaction rate constants is demonstrated. Membrane operating regimes and oxygen off-stoichiometric coefficients can thus be determined highlighting the importance of Surface exchange studies and the obvious requirement to reduce Sweep Surface P O 2 through oxyfuel reaction integration and/or flow field adjustments. A more complex first-order flux model is also proposed and tested incorporating the Surface oxygen ion concentrations in the Surface exchange reactions; this is found to give similar material parameters to the simpler zero-order model studied in the literature for this particular case.
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Measuring the oxygen profile and permeation flux across an ion transport (La0.9Ca0.1FeO3−δ) membrane and the development and validation of a multistep Surface exchange model
Journal of Membrane Science, 2014Co-Authors: Anton Hunt, Georgios Dimitrakopoulos, Patrick Kirchen, Ahmed F GhoniemAbstract:A novel ion transport membrane laboratory reactor is introduced which can sample gases at the La0.9Ca0.1FeO3 -δ membrane Surface at high temperature flux conditions. Experimental data (spatial profiles and operating condition sensitivity) is presented and used to validate detailed 1D and 2D numerical models under inert (CO2 Sweep) operating conditions; the numerical models account for mass transfer resistances to the membrane Surface. Bypassing the mass transfer resistances experimentally allows for direct parameterization of a three resistance oxygen flux model; a unique solution method based on bespoke experimental datasets to find Surface exchange reaction rate constants is demonstrated. Membrane operating regimes and oxygen off-stoichiometric coefficients can thus be determined highlighting the importance of Surface exchange studies and the obvious requirement to reduce Sweep Surface P O2 through oxyfuel reaction integration and/or flow field adjustments. A more complex first-order flux model is also proposed and tested incorporating the Surface oxygen ion concentrations in the Surface exchange reactions; this is found to give similar material parameters to the simpler zero-order model studied in the literature for this particular case. © 2014 Elsevier B.V
Georgios Dimitrakopoulos - One of the best experts on this subject based on the ideXlab platform.
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measuring the oxygen profile and permeation flux across an ion transport la0 9ca0 1feo3 δ membrane and the development and validation of a multistep Surface exchange model
Journal of Membrane Science, 2014Co-Authors: Anton Hunt, Georgios Dimitrakopoulos, Patrick Kirchen, Ahmed F GhoniemAbstract:Abstract A novel ion transport membrane laboratory reactor is introduced which can sample gases at the La 0.9 Ca 0.1 FeO 3 − δ membrane Surface at high temperature flux conditions. Experimental data (spatial profiles and operating condition sensitivity) is presented and used to validate detailed 1D and 2D numerical models under inert (CO2 Sweep) operating conditions; the numerical models account for mass transfer resistances to the membrane Surface. Bypassing the mass transfer resistances experimentally allows for direct parameterization of a three resistance oxygen flux model; a unique solution method based on bespoke experimental datasets to find Surface exchange reaction rate constants is demonstrated. Membrane operating regimes and oxygen off-stoichiometric coefficients can thus be determined highlighting the importance of Surface exchange studies and the obvious requirement to reduce Sweep Surface P O 2 through oxyfuel reaction integration and/or flow field adjustments. A more complex first-order flux model is also proposed and tested incorporating the Surface oxygen ion concentrations in the Surface exchange reactions; this is found to give similar material parameters to the simpler zero-order model studied in the literature for this particular case.
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Measuring the oxygen profile and permeation flux across an ion transport (La0.9Ca0.1FeO3−δ) membrane and the development and validation of a multistep Surface exchange model
Journal of Membrane Science, 2014Co-Authors: Anton Hunt, Georgios Dimitrakopoulos, Patrick Kirchen, Ahmed F GhoniemAbstract:A novel ion transport membrane laboratory reactor is introduced which can sample gases at the La0.9Ca0.1FeO3 -δ membrane Surface at high temperature flux conditions. Experimental data (spatial profiles and operating condition sensitivity) is presented and used to validate detailed 1D and 2D numerical models under inert (CO2 Sweep) operating conditions; the numerical models account for mass transfer resistances to the membrane Surface. Bypassing the mass transfer resistances experimentally allows for direct parameterization of a three resistance oxygen flux model; a unique solution method based on bespoke experimental datasets to find Surface exchange reaction rate constants is demonstrated. Membrane operating regimes and oxygen off-stoichiometric coefficients can thus be determined highlighting the importance of Surface exchange studies and the obvious requirement to reduce Sweep Surface P O2 through oxyfuel reaction integration and/or flow field adjustments. A more complex first-order flux model is also proposed and tested incorporating the Surface oxygen ion concentrations in the Surface exchange reactions; this is found to give similar material parameters to the simpler zero-order model studied in the literature for this particular case. © 2014 Elsevier B.V
