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Exercise 04 ENG
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: Dipartimento di Chimica, Materiali e Ingegneria Chimica “Giulio Natta” POLITECNICO di MILANO Practical class (informatic laboratory) of Chemical Processes and Technologies (Prof. Stefania Moioli) Binary distillation A liquid mixture at its bubble point contains 30 mol% of
Chemical Processes and Technologies - Impianti e Processi ChimiciBy topic
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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: Dipartimento di Chimica, Materiali e Ingegneria Chimica “Giulio Natta” POLITECNICO di MILANO Practical class (informatic laboratory) of Chemical Processes and Technologies (Prof. Stefania Moioli) Binary distillation A liquid mixture at its bubble point contains 30 mol% of
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Dipartimento di Chimica, Materiali e Ingegneria Chimica “Giulio Natta” POLITECNICO di MILANO Practical class (informatic laboratory) of Chemical Processes and Technologies (Prof. Stefania Moioli) Binary distillation A liquid mixture at its bubble point contains 30 mol% of benzene and 70 mol% of toluene and must be fractionated in a standard trayed distillation column, operated under continuous, steady-state conditions and at atmospheric pressure. The distillate and the bottom products have to contain, respectively, 95 mol% and 4 mol% of benzene. Adopting a reflux ratio (R) equal to 1.3 times the minimum reflux ratio (Rmin), compute the number of theoretical stages (N) required to perform the separation, usi ng the following three methods: • the graphical McCabe-Thiele method; • the analytical McCabe-Thiele method; • the Fenske-Gilliland method. Please evaluate, for the same separation, the variation of the number of theoretical stages N by varying the reflux ratio in the range 1.1 ∙ Rmin ≤ R ≤ 2 ∙ Rmin . Data The vapour pressure is calculated with the Antoine equation: ln( [ ]) [] ev BP mmHg A TK C= − + . Component A B C TNBP [K] Benzene 15.9008 2788.51 -52.36 353.3 Toluene 16.0137 3096.52 -53.67 383.8
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