Guessing a lower temperature until we get ∑ziKi = 1 or close to 1. So, Initial guess, TGuess = Σ zi Tiboil = 0.45×9.95+0.30×138.4+0.25×190.8 = 93.7 Cįrom Antoine’s equation at P = 3000 kPa and TGuess:įirst guess shows very high value of ∑ziKi above bubble point (since ∑ziKi & gt 1). Required, however, a higher number of trials might be required if the first guess is very poor. We are looking for a value of V/F for which f(ψ) = 0 or close to zero. Stage sufficient to meet the requirement? Use the following equilibrium curve.įigure 2-12: Modified DePriester chart at high temperature (Wankat, 2007) The spent should not contain more than 5 mol% NH3. So that NH3 can be desorbed from the aqueous solution. Mixture 829 kg/h aqueous 13.1 wt% NH3 solution is contacted with 499 m3/h of a 1.96 mol% NH3-in-air Table: Partial Pressure of Ammonia over Ammonia-Water Solutions at 20 ☌ĥ38 m3/h of a 10 mol% NH3-in-air mixture is required to produce nitrogen oxides. If 15 mole of gas of Y = 0.4 are contacted with 20 mole of solution of X = 0.2, what are theĬompositions of the resulting phases? The process is assumed to be isothermal at 1 atm. YA = mol NH3/mol air and XA = mole NH3/mole H2O as coordinates. Water and the solubility of air in water, construct an equilibrium diagram at 101 kPa using mole ratios Using these data and neglecting the vapor pressure of
Solutions at 20 ☌ is given in the Table below. The partial pressure of ammonia (A) in air-ammonia mixtures in equilibrium with their aqueous This equation is obtained by solving equation 3 of table 4.4 of text book for a binary mixture.ĭEPARTMENT OF CHEMICAL & amp MATERIALS ENGINEERINGĪlso use the following equation for vapor fraction of a binary mixture: Use the following reduced form of R-R equation for a binary mixture: 2.3 of Text book, Ps (benzene) are 20, 23.4Īnd 23.6 psia, respectively and Ps (toluene) are 8.0, 9.5 and 9.6 psia, respectively.] The problemĭo your calculations for T=195, 205 and 205.5oF, [From Fig. Solution and use vapor pressure data from Figure 2.3.
If 90% of the toluene entering in the feed leaves in the liquid? Assume the mixture to be an ideal What percent of benzene in the feed leaves in the vapor Table 1: Antoine’s constant for ethane, n-butane and n-propane, Psat is in and T is in K]Ī liquid containing 40 mol% benzene and 60 mol% toluene is continuously distilled in a singleequilibrium-stage unit at atmospheric pressure. The Antoine’s equation and the values of the constants for ethane, n-butane and n-pentane are given Find the bubble point temperature for the feed flash at drum Ī feed that is 45 mole% ethane, 30 mole% n-butane and 25 mole% n-pentane is flashed distilled. Drum pressure = 250 kPa, and drum temperature is = 30° C. Preview text DEPARTMENT OF CHEMICAL & amp MATERIALS ENGINEERINGĪ feed that is 50 mole% methane, 10 mole% butane, 15 mole% n-pentene, and 25 mole% n-hexane isįlashed distilled.
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