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: McGraw-Hill Education
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Troubleshooting.
Corrosion of high-nickel stainless steel plates was found to occur in a distillation column used at DuPont to separate HCN and water. Sulfuric acid is always added at the top of the column to prevent polymerization of HCN. Water collects at the bottom of the column and HCN collects
at the top. The amount of corrosion on each tray is shown in Figure P3-5B
as a function of plate location in the column.The bottom-most temperature of the column is approximately 125C and the topmost is 100C.The corrosion rate is a function of temperature and the concentration of an HCN–H2SO4 complex.Suggest an explanation for the observed corrosion-plate profile in the column. What effect would the column operating conditions have on the corrosion-plate profile?
Transcribed Image Text:H2SO4
Top
Plate 15
НCN
13
12
11
15
Feed
H2SO4
15% HCN
85% H20
Bottom
Plate
Corrosion, mils
H20
H2SO4
Distilation plate #
5432 -0987 65439T
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