Answered: Binary Distillation Water / n-Butanol…

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

Section: Chapter Questions

Problem 1.1P

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Binary Distillation

Water / n-Butanol System.

A saturated liquid feed of 500 mol/hr containing 40 mole % water is to be fractionated at 101.325kPa (abs)
in order to form a distillate containing 70 mole % water and a bottoms product of 10 mole % water.
NOTE: This is actually NOT an ideal solution.use the Raoult’s Law data
Assume a distillate reflux ratio (if necessary) of 3:1.
a) Calculate the flowrates (mol/hr) of the distillate and bottoms.
b) Determine the theoretical number of trays and the feed tray number for the specified operation.
c) Determine the minimum reflux ratio, RMIN and the minimum number of theoretical trays at total reflux

			Vapor Pressure
Temperature		water	n-butanol
T (F)	T (K)	T (C)	kPa	kPa	x	y
212.2	373.2	100.1	101.498	51.828	1.000	1.000
215.7	375.2	102.0	108.8	56.080	0.861	0.923
219.2	377.1	104.0	116.6	60.613	0.730	0.839
222.8	379.1	106.0	124.8	65.442	0.607	0.747
226.3	381.1	107.9	133.5	70.582	0.491	0.646
229.9	383.0	109.9	142.7	76.047	0.382	0.537
233.4	385.0	111.9	152.4	81.853	0.279	0.418
236.9	387.0	113.8	162.6	88.015	0.181	0.290
240.5	388.9	115.8	173.4	94.549	0.088	0.151
244.0	390.9	117.8	184.8	101.471	0.000	0.000

Expert Solution

Step 1: introduction

A mixture of water and n-butanol is separated into distillate and bottom product in a multistage distillation column.

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Thank You for the response.

Could you resolve the problem using the experimental data provided. How are the results different?

Experimental Data - Water & n-Butanol
T [K]	x	y
	0.000	0.000
384.1	0.050	0.253
380.0	0.092	0.388
379.6	0.097	0.402
374.0	0.181	0.556
369.8	0.291	0.660
369.5	0.303	0.666
367.2	0.417	0.724
366.2	0.546	0.750
366.2	0.550	0.753
365.9	0.752	0.754
365.9	0.902	0.754
366.0	0.980	0.760
366.0	0.981	0.763
368.6	0.991	0.839
369.0	0.992	0.850
	1.000	1.000