ELEM.PRIN.OF CHEMICAL PROC.-W/ACCESS
4th Edition
ISBN: 9781119330745
Author: FELDER
Publisher: WILEY
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Textbook Question
Chapter 4, Problem 4.32P
Gas streams containing hydrogen and nitrogen in different proportions arc produced on request by blending gases from two feed tanks: Tank A (hydrogen mole fraction = jea) and Tank B (hydrogen mole fraction = jeb )• The requests specify the desired hydrogen mole fraction, jep, and mass flow rate of the product stream, zhP(kg/h).
- Suppose the feed tank compositions are xa = 0.10 mol Hi/mol and xb = 0.50 mol H?/mol, and the desired blend-stream mole fraction and mass flow rate are xp = 0.20 mol H2/mol and ihp = lOOkg/h. Draw and label a flowchart and calculate the required molar flow rates of the feed mixtures, «A(kmol/h) and /iB(kmol/h).
- Derive a series of formulas for nA and ziB *n terms of xA, xB. xp, and mP. Test them using the values in Part (a).
- Write a spreadsheet that has column headings XA,XB.xP,zzzp,ziA.andziB. The spreadsheet should calculate entries in the last two columns corresponding to data in the first four. In the first six data rows of the spreadsheet, do the calculations for jea = 0.10, jeb = 0.50, and jep = 0.10. 0.20. 0.30, 0.40. 0.50, and 0.60, all forzzzP = lOOkg/h. Then in the next six rows repeat the calculations for the same values of jea, xb, and xP for zzzP = 250 kg/h. Explain any of your results that appear strange or impossible.
- Enter the formulas of Part (b) into an equation-solving program. Run the program to determine zza and hBfor the 12 sets of input variable values given in Part (c) and explain any physically impossible results.
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Chapter 4 Solutions
ELEM.PRIN.OF CHEMICAL PROC.-W/ACCESS
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