CHEN 3006 Lecture Notes - Lecture 37: Control Volume, Methyl Acetate, Partition Coefficient
9 Apr 2015
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Similar to absorption we"ll just do for rectifying column (top half of distillation column) For purifying materials already high in component 1 (already pretty pure) We work in top corner of graph so we can make some simplifications. Rate/kinetic equation (mass balance on small section; component balance on control volume a*deltaz) Eqbm relation/line (was often y = mxusually the case for dilute sol"nsconcentrated ones usually have partition coefficient) For distillation: if do overall balance looking @ entire system, (do balance on more volatile species, do it as y) Assume that l and g are constant (we can assume this b/c feed"s at bottom, not at middle; also b/c molar heats of vaporization are the same) Assume total condenser (if not told otherwise) (everything that comes in as vapor leaves as liquid) (only if total condenser) Accumulation = in - out + # moles evaporating.
