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Engineering
Materials and Chemical Engineering
Modelling of two phase flow in packed bed (continued)
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[QUOTE="Chestermiller, post: 6615798, member: 345636"] This mass balance applies to each component deposited at the interface between the gas and the solid bed. Regarding their lumped heat balance equation, my judgment is that they must be neglecting variations in the molar heat capacity of the gas mixture as a result of changes in the molar composition of the mixture in writing their relationship and in their calculations. This is probably a reasonably good approximation because the molar heat capacities of N2, H2O, and CO2 are not drastically different. Is this your understanding also? I think, otherwise, the heat balance would be much more complicated in form, for very little added benefit. Did you notice a typo error in the heat balance equation in the paper (it is in the axial heat dispersion term)? Tomorrow I will rewrite the equations in terms of molar flows and mole fractions instead of mass flows and mass fractions, and propose some improvements to the formulation, particularly of the axial dispersion terms. I will also begin to formulate how to discretize the model so it looks much more like our tanks in series model. [/QUOTE]
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Engineering
Materials and Chemical Engineering
Modelling of two phase flow in packed bed (continued)
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