Table 1: Composition of underflow stream N 0.701 0.569| 0.462 0.369 0.280 0.180 YA 0.05 0.1 0.15 0.20 0.25 a) Calculate the flowrates for each component at the feed. b) Calculate the amounts and compositions of the overflow and underflow streams leaving the process. d) Determine the number of theoretical stages required for the separation.

Introduction to Chemical Engineering Thermodynamics
8th Edition
ISBN:9781259696527
Author:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Publisher:J.M. Smith Termodinamica en ingenieria quimica, Hendrick C Van Ness, Michael Abbott, Mark Swihart
Chapter1: Introduction
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Table 1: Composition of underflow stream
N
0.701 | 0.569 0.462 | 0.369 0.280 | 0.180
YA
0.05
0.1
0.15
0.20
0.25
a) Calculate the flowrates for each component at the feed.
b) Calculate the amounts and compositions of the overflow and underflow streams leaving
the process.
d) Determine the number of theoretical stages required for the separation.
Transcribed Image Text:Table 1: Composition of underflow stream N 0.701 | 0.569 0.462 | 0.369 0.280 | 0.180 YA 0.05 0.1 0.15 0.20 0.25 a) Calculate the flowrates for each component at the feed. b) Calculate the amounts and compositions of the overflow and underflow streams leaving the process. d) Determine the number of theoretical stages required for the separation.
The following reaction occurs in a lime-soda process.
Na,CO, + Ca(OH), I CaCO; + 2 NaOH
A solution of 65 wt % sodium carbonate (soda) in water was reacted with calcium
hydroxide (lime) to produce 1000 kg/h calcium carbonate and a certain amount of sodium
hydroxide (NaOH). Once the reaction was complete, a multistage countercurrent leaching
was used to extract the NaOH from the sludge formed in the reaction products. Pure water
was used to leach the NaOH from the sludge with 82 % NAOH recovery. CaCO, is assumed to
be completely insoluble in water. The composition of NaOH in the overflow stream is X, =
%3D
0.18. Meanwhile, the composition of the underflow stream is shown in Table 1. The
molecular weight of Na,CO,, Ca(OH)2, CaCO; and NaOH are 106, 74, 100 and 40 respectively.
Transcribed Image Text:The following reaction occurs in a lime-soda process. Na,CO, + Ca(OH), I CaCO; + 2 NaOH A solution of 65 wt % sodium carbonate (soda) in water was reacted with calcium hydroxide (lime) to produce 1000 kg/h calcium carbonate and a certain amount of sodium hydroxide (NaOH). Once the reaction was complete, a multistage countercurrent leaching was used to extract the NaOH from the sludge formed in the reaction products. Pure water was used to leach the NaOH from the sludge with 82 % NAOH recovery. CaCO, is assumed to be completely insoluble in water. The composition of NaOH in the overflow stream is X, = %3D 0.18. Meanwhile, the composition of the underflow stream is shown in Table 1. The molecular weight of Na,CO,, Ca(OH)2, CaCO; and NaOH are 106, 74, 100 and 40 respectively.
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