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oxygen gas surface reaction and the product diffusion into the block

Posted 2015年3月30日 GMT-4 20:50 Chemical Reaction Engineering, Modeling Tools & Definitions, Parameters, Variables, & Functions Version 5.0 2 Replies

Feng Song
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there is an boundary condition question on the process of oxygen gas surface reaction and the product diffusion into the block.

oxygen gas reacts with the metal on the metal surface, and the productof metal oxide diffuse into the metal block.
I'm not sure the flux boundary condition.
J=reaction rate or J=reaction rate - dcs/dt, cs is the concentration of metal oxide in the surface of metal.
which one of boundary condition is right for the process?

2 Replies Last Post 2015年3月31日 GMT-4 06:30
Lasse Murtomäki
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Posted: 10 years ago 2015年3月31日 GMT-4 01:32
Hi

For oxygen the boundary condition is J = -reaction rate, minus sign because oxygen is consumed. For the metal oxide the BC is J = +reaction rate, because it is produced.

BR
Lasse
Hi For oxygen the boundary condition is J = -reaction rate, minus sign because oxygen is consumed. For the metal oxide the BC is J = +reaction rate, because it is produced. BR Lasse
Feng Song
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Posted: 10 years ago 2015年3月31日 GMT-4 06:30
thanks a lot
thanks a lot

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