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Trang 1Adsorption
and Chromatography
Volume I
Author
Phillip C Wankat, Ph.D.
ProfessorDepartment of Chemical Engineering
Purdue UniversityWest Lafayette, Indiana
CRC Press, Inc.
Boca Raton, Florida
Trang 2Adsorption
and Chromatography
Volume II
Author
Phillip C Wankat, Ph.D.
ProfessorDepartment of Chemical Engineering
Purdue UniversityWest Lafayette, Indiana
CRC Press, Inc.
Boca Raton, Florida
Trang 3Library of Congress Cataloging-in-Publication Data
Wankat, Phillip C ,
1944-Large-scale adsorption and chromatography.
Includes bibliographies and indexes.
1 Chromatographic analysis 2 Adsorption.
All rights reserved This book, or any parts thereof, may not be reproduced in any form without written consent from the publisher.
Direct all inquiries to CRC Press, Inc., 2000 Corporate Blvd., N.W., Boca Raton, Florida, 33431.
Trang 4My major goal in writing this book has been to present a unified, up-to-date development
of operating methods used for large-scale adsorption and chromatography I have attempted
to gather together the operating methods which have been used or studied for large-scaleapplications These methods have been classified and compared The main unifying principlehas been to use the same theory, the solute movement or local equilibrium theory, to presentall of the methods Mass transfer and dispersion effects are included with the nonlinear masstransfer zone (MTZ) and the linear chromatographic models More complex theories arereferenced, but are not discussed in detail since they often serve to obscure the reasons for
a separation instead of enlightening Liberal use has been made of published experimentalresults to explain the operating methods
Most of the theory has been placed in Chapter 2 I recommend that the reader studySections II and IV A and IV.B carefully since the other chapters rely very heavily on thesesections The rest of Chapter 2 can be read when you feel motivated The remaining chaptersare all essentially independent of each other, and the reader can skip to any section ofinterest Considerable cross-referencing of sections is used to guide the reader to othersections of interest
I have attempted to present a complete review of the open literature, but have not attempted
a thorough review of the patent literature Many commercial methods have been published
in unconventional sources such as company brochures Since these may be the only or atleast the most thorough source, I have referenced many such reports Company addressesare presented so that interested readers may follow up on these references Naturally, com-pany brochures are often not completely unbiased The incorporation of new referencesceased in mid-May 1985 I apologize for any important references which may have beeninadvertently left out
Several places throughout the text I have collected ideas and made suggestions for ways
to reduce capital and/or operating expenses for different separation problems Since eachseparation problem is unique, these suggestions cannot be universally valid; however, Ibelieve they will be useful in the majority of cases I have also looked into my cloudy crystalball and tried to predict future trends; 5 years from now some of these predictions should
be good for a laugh
Much of this book was written while I was on sabbatical I wish to thank Purdue Universityfor the opportunity to take this sabbatical, and Laboratoire des Sciences du Genie Chimique,Ecole Nationale Superieure des Industries Chimiques (LSGC-ENSIC) for their hospitality.The support of NSF and CNRS through the U.S./France Scientific Exchange Program isgratefully acknowledged Dr Daniel Tondeur, Dr Georges Grevillot, and Dr John Dodds
at LSGC-ENSIC were extremely helpful in the development of this book My graduate levelclass on separation processes at Purdue University served as guinea pigs and went throughthe first completed draft of the book They were extremely helpful in polishing the bookand in finding additional references The members of this class were Lisa Brannon, JudyChung, Wayne Curtis, Gene Durrence, Vance Flosenzier, Rod Geldart, Ron Harland, Wei-Yih Huang, Al Hummel, Jay Lee, Waihung Lo, Bob Neuman, Scott Rudge, Shirish Sanke,Jeff Straight, Sung-Sup Suh, Narasimhan Sundaram, Bart Waters, Hyung Suk Woo, andQiming Yu Many other researchers have been helpful with various aspects of this book,often in ways they are totally unaware of A partial listing includes Dr Philip Barker, Dr.Brian Bidlingmeyer, Dr Donald Broughton, Dr Armand deRosset, Dr George Keller, Dr
C Judson King, Dr Douglas Levan, Dr Buck Rogers, Dr William Schowalter, and Dr.Norman Sweed The typing and help with figures of Connie Marsh and Carolyn Blue wereinvaluable and is deeply appreciated Finally, I would like to thank my parents and partic-ularly my wife, Dot, for their support when my energy and enthusiasm plummeted
Trang 5THE AUTHOR
Phillip C Wankat is a Professor of Chemical Engineering aat Purdue University in West
Lafayette, Ind Dr Wankat received his B.S.Ch.E from Purdue University in 1966 and hisPh.D degree in Chemical Engineering from Princeton University in 1970 He became anAssistant Professor at Purdue University in 1970, an Associate Professor in 1974, and aProfessor in 1978 Prof Wankat spent sabbatical years at the University of California-Berkeley and at LSGC, ENSIC, Nancy, France
His research interests have been in the area of separation processes with an emphasis onoperating methods for adsorption and large-scale chromatography He has published over
70 technical articles, and has presented numerous seminars and papers at meetings He wasChairman of the Gordon Research Conference on Separation and Purification in 1983 He
is on the editorial board of Separation Science He is active in the American Institute ofChemical Engineers, the American Chemical Society, and the American Society for Engi-neering Education He has consulted with several companies on various separation problems.Prof Wankat is very interested in good teaching and counseling He earned an M.S.Ed,
in Counseling from Purdue University in 1982 He has won several teaching and counselingawards, including the American Society for Engineering Education George WestinghouseAward in 1984
Trang 6Adsorption
and Chromatography
Volume I
Author
Phillip C Wankat, Ph.D.
ProfessorDepartment of Chemical Engineering
Purdue UniversityWest Lafayette, Indiana
CRC Press, Inc.
Boca Raton, Florida
Trang 7Adsorption
and Chromatography
Volume II
Author
Phillip C Wankat, Ph.D.
ProfessorDepartment of Chemical Engineering
Purdue UniversityWest Lafayette, Indiana
CRC Press, Inc.
Boca Raton, Florida
Trang 8Library of Congress Cataloging-in-Publication Data
Wankat, Phillip C ,
1944-Large-scale adsorption and chromatography.
Includes bibliographies and indexes.
1 Chromatographic analysis 2 Adsorption.
All rights reserved This book, or any parts thereof, may not be reproduced in any form without written consent from the publisher.
Direct all inquiries to CRC Press, Inc., 2000 Corporate Blvd., N.W., Boca Raton, Florida, 33431.
Trang 9My major goal in writing this book has been to present a unified, up-to-date development
of operating methods used for large-scale adsorption and chromatography I have attempted
to gather together the operating methods which have been used or studied for large-scaleapplications These methods have been classified and compared The main unifying principlehas been to use the same theory, the solute movement or local equilibrium theory, to presentall of the methods Mass transfer and dispersion effects are included with the nonlinear masstransfer zone (MTZ) and the linear chromatographic models More complex theories arereferenced, but are not discussed in detail since they often serve to obscure the reasons for
a separation instead of enlightening Liberal use has been made of published experimentalresults to explain the operating methods
Most of the theory has been placed in Chapter 2 I recommend that the reader studySections II and IV A and IV.B carefully since the other chapters rely very heavily on thesesections The rest of Chapter 2 can be read when you feel motivated The remaining chaptersare all essentially independent of each other, and the reader can skip to any section ofinterest Considerable cross-referencing of sections is used to guide the reader to othersections of interest
I have attempted to present a complete review of the open literature, but have not attempted
a thorough review of the patent literature Many commercial methods have been published
in unconventional sources such as company brochures Since these may be the only or atleast the most thorough source, I have referenced many such reports Company addressesare presented so that interested readers may follow up on these references Naturally, com-pany brochures are often not completely unbiased The incorporation of new referencesceased in mid-May 1985 I apologize for any important references which may have beeninadvertently left out
Several places throughout the text I have collected ideas and made suggestions for ways
to reduce capital and/or operating expenses for different separation problems Since eachseparation problem is unique, these suggestions cannot be universally valid; however, Ibelieve they will be useful in the majority of cases I have also looked into my cloudy crystalball and tried to predict future trends; 5 years from now some of these predictions should
be good for a laugh
Much of this book was written while I was on sabbatical I wish to thank Purdue Universityfor the opportunity to take this sabbatical, and Laboratoire des Sciences du Genie Chimique,Ecole Nationale Superieure des Industries Chimiques (LSGC-ENSIC) for their hospitality.The support of NSF and CNRS through the U.S./France Scientific Exchange Program isgratefully acknowledged Dr Daniel Tondeur, Dr Georges Grevillot, and Dr John Dodds
at LSGC-ENSIC were extremely helpful in the development of this book My graduate levelclass on separation processes at Purdue University served as guinea pigs and went throughthe first completed draft of the book They were extremely helpful in polishing the bookand in finding additional references The members of this class were Lisa Brannon, JudyChung, Wayne Curtis, Gene Durrence, Vance Flosenzier, Rod Geldart, Ron Harland, Wei-Yih Huang, Al Hummel, Jay Lee, Waihung Lo, Bob Neuman, Scott Rudge, Shirish Sanke,Jeff Straight, Sung-Sup Suh, Narasimhan Sundaram, Bart Waters, Hyung Suk Woo, andQiming Yu Many other researchers have been helpful with various aspects of this book,often in ways they are totally unaware of A partial listing includes Dr Philip Barker, Dr.Brian Bidlingmeyer, Dr Donald Broughton, Dr Armand deRosset, Dr George Keller, Dr
C Judson King, Dr Douglas Levan, Dr Buck Rogers, Dr William Schowalter, and Dr.Norman Sweed The typing and help with figures of Connie Marsh and Carolyn Blue wereinvaluable and is deeply appreciated Finally, I would like to thank my parents and partic-ularly my wife, Dot, for their support when my energy and enthusiasm plummeted
Trang 10THE AUTHOR
Phillip C Wankat is a Professor of Chemical Engineering aat Purdue University in West
Lafayette, Ind Dr Wankat received his B.S.Ch.E from Purdue University in 1966 and hisPh.D degree in Chemical Engineering from Princeton University in 1970 He became anAssistant Professor at Purdue University in 1970, an Associate Professor in 1974, and aProfessor in 1978 Prof Wankat spent sabbatical years at the University of California-Berkeley and at LSGC, ENSIC, Nancy, France
His research interests have been in the area of separation processes with an emphasis onoperating methods for adsorption and large-scale chromatography He has published over
70 technical articles, and has presented numerous seminars and papers at meetings He wasChairman of the Gordon Research Conference on Separation and Purification in 1983 He
is on the editorial board of Separation Science He is active in the American Institute ofChemical Engineers, the American Chemical Society, and the American Society for Engi-neering Education He has consulted with several companies on various separation problems.Prof Wankat is very interested in good teaching and counseling He earned an M.S.Ed,
in Counseling from Purdue University in 1982 He has won several teaching and counselingawards, including the American Society for Engineering Education George WestinghouseAward in 1984
Trang 11cycling zone adsorption 1.124
fractionation by continuous adsorption 2.60
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liquid adsorption with thermal regeneration 1.81
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Carrier gas (Continued)
Cell model, pressure swing adsorption 1.114
Celluloses 2.128 Centrifugal chromatography 2.115 2.126
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Column switching (Continued)
Complementary pressure swing, adsorption 1.105
Compressed air, drying of 1.71
Compression 2.9
Continuous adsorption, fractionation by 2.60
Continuous annular chromatography (CAC) 2.119
Continuous chromatography 2.63
Continuous countercurrent separation 2.126
Continuous flow of solids 2.41
fractionation systems, see also Fractionation
systems 2.58
single solute recovery, also Single solute
recovery 2.41
Continuous contact models 1.131
Continuous contact moving bed sorption
Continuous countercurrent separation 2.126
Continuous flow of solids 2.41
fractionation systems, see also Fractionation
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Countercurrent systems, see also Moving beds;
Simulated moving beds 2.41
Counter-flow regeneration, see also Backflush 1.57 1.62 1.70
Coupled equilibrium theories 1.72
Cyclic operations, see also specific topics 1.91
cycling zone adsorption 1.117 1.122
vacuum swing adsorption 1.91 1.96
Cyclic separation models 1.114
Cyclic separations, see Cyclic operations
Cycling separations, see Cyclic operations
Cycling zone adsorption (CZA) 1.94 1.122 2.17 2.125
cyclic separation models 1.117
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Cycling zone adsorption (CZA) (Continued)
equilibrium staged analysis 1.117
equilibrium staged theory 1.125
local equilibrium model applications 1.114
multicomponent 1.128
solute movement theory 1.123
traveling wave mode 1.114 1.117 1.124 1.130
CZA, see Cycling zone adsorption
D
Dealkalization 2.57 Decolorizing 2.68 Deformable gel particles 1.64
Delay, pressure swing adsorption 1.98 1.101
Dense moving bed systems for single solute
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Desorbent regeneration (Continued)
liquid adsorption with 1.84 1.86
Direct mode cycling zone adsorption 1.114 1.122
Direct mode parametric pumping 1.106 1.113 1.116
Displacement development 1.32
Distribution 2.13
Drinking water treatment 1.82
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continuous chromatography 2.63
simulated moving beds, see also Simulated
Trang 21I.11
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adsorption with desorbent regeneration 1.84
adsorption with thermal regeneration, see also
Gas chromatography (GC) 2.1 2.3 2.30 2.76
overflooding 2.32 Gas-liquid chromatograph (GLC) 1.12 1.22 1.50 2.1 2.31 2.118
applications 2.33
fractionation 2.64 overflooding 2.14 particle diameter effects 2.12
selectivity 2.7 simulated moving bed fractionation 2.89
Gasoline vapors, recovery of 1.77
Gas solid chromatography (GSC) 2.31
Gerthold simulated co-current flow process 2.111
GLC, see Gas-liquid chromatography
Trang 22I.12
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HPLC, see High performance liquid
chromatography
Hybrid chromatographic processes, see also
Column switching; Moving ports 1.3 2.95
Hydrophobic chromatography 2.36
Trang 23I.13
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Ideal Adsorbed Solution (IAS) theory 1.84
IEC, see Ion-exchange chromatography
Intermediate heat exchangers 1.111
Intermittent solids flow 2.65
packed bed during fluid flow step 2.68
staged fluidized bed during fluid flow step 2.72
2.56 2.68 2.72 2.76 2.81 2.88 2.102 2.111 2.122 2.128
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Irreversible kinetics model 1.80
Isoelectric point, parametric pumping 1.119
carrier gas requirements 2.7
complexity 2.4
compression 2.9
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Large-scale chromatography (Continued)
particle diameter differences 1.60
Layered chromatography with cross-flow
elution 2.126
LC, see Liquid chromatography
Length of unused bed (LUB)
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Linear chromatography, see Chromatography
Linear dispersion model 2.102
Liquid adsorption systems, simulated moving
adsorption with desorbent regeneration 1.84 1.86
adsorption with thermal regeneration, see also
Loading ratio correlation (LRC) 1.12
Local equilibrium model 1.35 1.113 1.116
Local equilibrium theory 1.32 1.53 1.72 1.131
pressure swing adsorption 1.93 1.95
LUB, see Length of unused bed approach
M
Magnetically stabilized countercurrent
Magnetically stabilized fluidized beds 2.63
Magnetically stabilized moving beds 2.51
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Mass transfer resistance 1.46 1.60
Mass transfer zone (MTZ) approach 1.1 1.7 1.22 1.72 1.82
cycling zone adsorption 1.117
cycling zone adsorption 1.126
pressure swing adsorption 1.99
Moving bed systems, see Moving beds
Trang 28I.18
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Moving equipment systems 2.76
Moving feed chromatography 2.100 2.113 2.126
Moving port chromatography 2.104 2.121
simulated moving beds compared 2.108
Moving withdrawal chromatography 2.98 2.105 2.109 2.113
MTZ, see Mass transfer zone (MTZ)
pressure swing adsorption 1.95
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liquid adsorption with 1.81
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biochemical affinity systems 1.121
commercial use of, see also Sirotherm process 1.121
local equilibrium model 1.116
applications 1.113
local equilibrium theory 1.109 1.119
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building blocks for cycles 1.96
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Pressure swing adsorption (PSA) (Continued)
local equilibrium model applications 1.113
local equilibrium theory 1.93 1.95
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thermal, see Thermal regeneration
Regenerated rotating annulus system 2.122
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Simulated co-current operation 2.111
Simulated moving beds (SMB) 2.41 2.68 2.78 2.95 2.106
2.113
fractionation 2.81
liquid adsorption systems 2.85
size exclusion chromatography 2.88
solute movement theory 2.82
thermally regenerated 2.90
moving port chromatography compared 2.108
Simulated moving bed (SMB) systems 1.3
dense moving bed systems for 2.50
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Single solute recovery (Continued)
simulated moving bed fractionation 2.88
Skarstrom-type pressure swing adsorption
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Solute movement theory, see also Solute
2.6 2.17 2.37 2.65 2.100
co-flow and counter-flow regeneration 1.57 1.59
combination with zone spreading 1.49
continuous moving bed systems 2.41
cycling zone adsorption 1.123
formal mathematical development 1.35
solvent recovery with activated carbon 1.78
traveling wave cycling zone adsorption 1.124
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Staged model for chromatography, see Staged
pressure swing adsorption 1.115
traveling wave mode cycling zone adsorption 1.125
Supercritical fluid desorption 1.87
Supercritical fluid regeneration 1.84
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trace contaminant removal 1.69
traveling wave cycling zone adsorption 1.124
Trace contaminant removal 1.69
Trapping, see Focusing
cycling zone adsorption 1.114 1.117 1.124 1.130
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Vacuum swing adsorption (VSA), see also
Pressure swing adsorption 1.91 1.96
building blocks for cycles 1.96
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pressure swing adsorption 1.99
Zeolite molecular sieves, see Zeolite
Zeolites, see Molecular sieve zeolites
1.65 1.80 2.4 2.11 2.15 2.18 2.35 2.37 2.96 2.98
combination with solute movement theory 1.49
height of theoretical plate 1.45