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Please answer all the questions correctly providing necessary formulae, equations, expressions, diagrams, charts, graphs, plots and tables. 3. i) Derive Rayleigh equation for binary mixture
Please answer all the questions correctly providing necessary formulae, equations, expressions, diagrams, charts, graphs, plots and tables.
3. i) Derive Rayleigh equation for binary mixture in batch distillation. [10] ii) Derive an expression relating crystal growth rate and overall mass transfer resistance for crystallization operation. [5] iii) The feed to a continuous crystallizer that can be simulated with the MSMPR model is 5,000kg/h of 40 wt\% sodium acetate in water. Monoclinic crystals of the trihydrate are formed. The pressure in the crystallizer and the heat-transfer rate in the associated heat exchanger are such that 20% of the water in the feed is evaporated at a crystallizer temperature of 40C. The crystal growth rate, G, is 0.0002m/h and a predominant crystal size, Lpr, of 20 mesh is desired (opening is 0.833mm ). Determine the: (a) kg/h of crystals in the exiting magma; (b) kg/h of mother liquor in the exiting magma; and (c) volume in m3 of magma in the crystallizer If density of the crystals =1.45g/cm3 and density of the mother liquor =1.20g/cm3. [10]Step by Step Solution
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