Rate-based models for distillationThe methods presented in Chapters 10 and 11 assumed thatequilibrium is achieved at each stage, with respect to heat andmass transfer.However, in most industrial applications (or real processes),the equilibrium is never reached.TheRate-Based Modelis an alternative to equilibrium basedd lhthdb ldldmodels, where the mass and energy balances are developedseparately for each phase around a stage. A stage can be atray a collection of trays or a segment of a packed sectiontray, a collection of trays, or a segment of a packed section.
Rate-based models for distillationModel ObjectiveModel DevelopmentDevelopageneralmodelforavapor-liquidseparator(staged column) operating at steadystate.Model assumptions1.There is equilibrium between vapor-liquid only atthe interface2.No chemical reactions occur3.Entrainmentofliquiddropsinvaporandocclusion of vapor in liquid are negligible.4.Vertical column with countercurrent flow5.Continuous operation
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