Topic-based study materials for Chemical Processes and Technologies - Impianti e Processi Chimici in the Energy Engineering degree programme at Politecnico di Milano. The document covers: Chemical Processes and Technologies (Prof. Laura Pellegrini) Multicomponent distillation A liquid mixture at its bubble point containing 4 mol% of n-pentane, 40 mol% of n-hexane, 50 mol% of n-heptane and 6 mol% of n-octane is fractionated in a standard plate distillation column,
Topic-based study materials for Chemical Processes and Technologies - Impianti e Processi Chimici in the Energy Engineering degree programme at Politecnico di Milano. The document covers: Chemical Processes and Technologies (Prof. Laura Pellegrini) Multicomponent distillation A liquid mixture at its bubble point containing 4 mol% of n-pentane, 40 mol% of n-hexane, 50 mol% of n-heptane and 6 mol% of n-octane is fractionated in a standard plate distillation column,
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Chemical Processes and Technologies (Prof. Laura Pellegrini) Multicomponent distillation A liquid mixture at its bubble point containing 4 mol% of n-pentane, 40 mol% of n-hexane, 50 mol% of n-heptane and 6 mol% of n-octane is fractionated in a standard plate distillation column, operat ed at atmospheric pressure. Adopting a reflux ratio equal to 1.5·Rmin, determine the number of ideal trays required to recover 98% of n-hexane and 1% of n-heptane in the top product stream. Finally, compute the thermal power required at the reboiler of the column. Data: Component A B C TNB [K] Hev (TebN) [kcal/kmol] <cPV> [kcal/(kmol·K)] <cPL> [kcal/(kmol·K)] Tc [K] n-pentane 15.8333 2477.07 -39.94 309.2 6160. 31.02 37.614 469.6 n-hexane 15.8366 2697.55 -48.78 341.9 6896. 38.86 51.70 507.4 n-heptane 15.8737 2911.32 -56.51 371.6 7576. 45.15 56.12 540.2 n-octane 15.9426 3120.29 -63.63 398.8 8225. 52.23 63.89 568.8 Antoine equation: 0ln( ) BPA TC , with T in [K] and P° in [mmHg]. Dipartimento di Chimica, Materiali e Ingegneria Chimica “Giulio Natta” POLITECNICO di MILANO
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