Transcription of Gas- Liquid and Gas –Liquid –Solid Reactions
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Gas- Liquid and Gas –Liquid –Solid Reactions
Gas- Liquid and Gas Liquid Solid ReactionsBasic ConceptsProper Approach to Gas- Liquid ReactionsReferences MassTransfertheories Gas-liquidreactionregimes Multiphasereactorsandselectioncriterion Filmmodel:Governingequations,problemcomp lexities ExamplesandIllustrativeResults SolutionAlgorithm(computationalconcepts) Theories for Analysis of Transport Effects in Gas- Liquid ReactionsTwo-film Whitman, Chem. & Met. Eng., 29147 (1923).2. W. K. Lewis & W. G. Whitman, Ind. Eng. Chem., 16, 215 (1924).Penetration theoryP. V. Danckwerts, Trans. Faraday Soc., 46300 (1950).P. V. Danckwerts, Trans. Faraday Soc., 47300 (1951).P. V. Danckwerts, Gas- Liquid Reactions , McGraw-Hill, NY (1970).R. Higbie, Trans. Am. Inst. Chem. Engrs., 31365 (1935).Surface renewal theoryP.
1. A stagnant layer exists in both the gas and the liquid phases. 2. The stagnant layers or films have negligible capacitance and hence a local steady-state exists. 3. Concentration gradients in the film are one-dimensional. 4. Local equilibrium exists between the the gas and liquid phases as the gas-liquid interface 5.
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