1987
DOI: 10.1016/0011-9164(87)90129-9
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Using a homogeneous model in simulation of sea water desalination condenser

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“…A classical method3t4t for the evaluation of the effect of diffusion phenomena on the overall kinetics of a porous catalyst pellet, based on Fick's first law of diffusion, includes calculations of the Thiele modulus and the effectiveness factot As a matter of fact, the effective overall kinetics of a porous catalyst pellet can be calculated, on the basis of the kinetics estimated under conditions of uni-portions underneath the gas channels (diffusion limitations in the direction perpendicular to the cell plane) and to half the rib side in the portions underneath the ribs (inplane diffusion limitations). The kinetic constant k can be estimated on the basis of 'unit at either the anode or the cathode side k = 'unit [13] neFCa where a is the electrode thickness, ne the number of electrons transferred per reacting molecule, and C is the gaseous reactant concentration (hydrogen at the anode and oxygen at the cathode). The equation above is valid under the hypothesis of first-order kinetics in p(O) and p(H20).…”
Section: Mathematical Modelmentioning
confidence: 99%
“…A classical method3t4t for the evaluation of the effect of diffusion phenomena on the overall kinetics of a porous catalyst pellet, based on Fick's first law of diffusion, includes calculations of the Thiele modulus and the effectiveness factot As a matter of fact, the effective overall kinetics of a porous catalyst pellet can be calculated, on the basis of the kinetics estimated under conditions of uni-portions underneath the gas channels (diffusion limitations in the direction perpendicular to the cell plane) and to half the rib side in the portions underneath the ribs (inplane diffusion limitations). The kinetic constant k can be estimated on the basis of 'unit at either the anode or the cathode side k = 'unit [13] neFCa where a is the electrode thickness, ne the number of electrons transferred per reacting molecule, and C is the gaseous reactant concentration (hydrogen at the anode and oxygen at the cathode). The equation above is valid under the hypothesis of first-order kinetics in p(O) and p(H20).…”
Section: Mathematical Modelmentioning
confidence: 99%