The data given below are for the adsorption of Nitrogen Gas on Silica Gel. The Saturation Vapor Pressure (Pº) is 101.325 kPa. Identify the appropriate adsorption isotherm that is exhibited by the data (Langmuir and BET only) .Determine the maximum adsorption capacity (Vmono) and the adsorption constant K (c in BET model) in both models.. P (kPa) Volume Adsorbed (Vads) 0.80 3.1 3.30 6.4 5.00 6.7 6.29 7 7.52 7.2 9.01 7.4 11.24 7.7 18.73 8.5 30.67 9.9 38.02 10.7 42.74 11.5 Equations: Langmuir Adsorption Isotherm 1 V = ads V ads mono BET Adsorption Isotherm cV mono Prel Prel 1 c-1 Vad = = + (1− Prel)(1+ (c−1) Prel) Vads (1-Prel) CV cV mono ads Prel = P/Pº V kp mono 1+ k p = V 1 1 k p or inverse: + V mono mono
The data given below are for the adsorption of Nitrogen Gas on Silica Gel. The Saturation Vapor Pressure (Pº) is 101.325 kPa. Identify the appropriate adsorption isotherm that is exhibited by the data (Langmuir and BET only) .Determine the maximum adsorption capacity (Vmono) and the adsorption constant K (c in BET model) in both models.. P (kPa) Volume Adsorbed (Vads) 0.80 3.1 3.30 6.4 5.00 6.7 6.29 7 7.52 7.2 9.01 7.4 11.24 7.7 18.73 8.5 30.67 9.9 38.02 10.7 42.74 11.5 Equations: Langmuir Adsorption Isotherm 1 V = ads V ads mono BET Adsorption Isotherm cV mono Prel Prel 1 c-1 Vad = = + (1− Prel)(1+ (c−1) Prel) Vads (1-Prel) CV cV mono ads Prel = P/Pº V kp mono 1+ k p = V 1 1 k p or inverse: + V mono mono
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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Transcribed Image Text:1.
The data given below are for the adsorption of Nitrogen Gas on Silica Gel. The Saturation Vapor Pressure (Pº) is 101.325 kPa. Identify the appropriate
adsorption isotherm that is exhibited by the data (Langmuir and BET only) .Determine the maximum adsorption capacity (Vmono) and the adsorption constant K
(c in BET model) in both models..
P (kPa) Volume Adsorbed (Vads)
0.80
3.1
3.30
6.4
5.00
6.7
6.29
7
7.52
7.2
9.01
7.4
11.24
7.7
18.73
8.5
30.67
9.9
38.02
10.7
42.74
11.5
Equations:
Langmuir Adsorption Isotherm
V
1
1 1 1
V
=====
+
ads
V
k p
V
ads
mono
mono
BET Adsorption Isotherm
cV
mono Prel
c-1
Vad
=
ads
or inverse:
(1-P)(1+(c-1) Prel)'
Prel= P/Pº
=
k p
V
mono
1+ k p
Prel
1
=
Vads (1-Prel) CV
mono
+
cV
mono
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