On the modeling of PSA cycles with hysteresis-dependent isotherms

František Štěpánek; Milan Kubíček; Miloš Marek; Miroslav Šoóš; Pavol Rajniak; Ralph T. Yang

doi:10.1016/S0009-2509(99)00338-3

On the modeling of PSA cycles with hysteresis-dependent isotherms

František Štěpánek
, Milan Kubíček
, Miloš Marek
, Miroslav Šoóš
, Pavol Rajniak
, Ralph T. Yang

Department of Chemical and Biological Engineering

Ctr. Nonlinear Dynam. Chem. Biol. S.
Slovak University of Technology in Bratislava

Research output: Contribution to journal › Conference article › peer-review

32 Scopus citations

Abstract

A four-step pressure swing adsorption (PSA) process for air drying on a silica gel dessicant is considered. The effects of hysteresis in adsorption/desorption equilibrium isotherms and of loading dependence of the effective diffusion coefficient on the process performance are investigated on a mathematical model. A comparative parametric study reveals that for identical operating conditions, hysteresis can be detrimental to product purity. Multiplicity of cyclic steady states is shown to exist as a result of hysteresis. A transient regime invoked by a gradual change in the inlet air humidity is discussed.

Original language	English
Pages (from-to)	431-440
Number of pages	10
Journal	Chemical Engineering Science
Volume	55
Issue number	2
DOIs	https://doi.org/10.1016/S0009-2509(99)00338-3
State	Published - Jan 2000
Event	Proceedings of the 1998 Symposium on Non-Linear Dynamics in Chemical and Bioengineering Processes - CHISA '98 - Prague, Czech Republic Duration: Aug 23 1998 → Aug 28 1998

Keywords

Air drying
Dynamic simulation
Hysteresis
Multiplicity
PSA
Silica gel

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10.1016/S0009-2509(99)00338-3

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title = "On the modeling of PSA cycles with hysteresis-dependent isotherms",

abstract = "A four-step pressure swing adsorption (PSA) process for air drying on a silica gel dessicant is considered. The effects of hysteresis in adsorption/desorption equilibrium isotherms and of loading dependence of the effective diffusion coefficient on the process performance are investigated on a mathematical model. A comparative parametric study reveals that for identical operating conditions, hysteresis can be detrimental to product purity. Multiplicity of cyclic steady states is shown to exist as a result of hysteresis. A transient regime invoked by a gradual change in the inlet air humidity is discussed.",

keywords = "Air drying, Dynamic simulation, Hysteresis, Multiplicity, PSA, Silica gel",

author = "Franti{\v s}ek {\v S}t{\v e}p{\'a}nek and Milan Kub{\'i}{\v c}ek and Milo{\v s} Marek and Miroslav {\v S}o{\'o}{\v s} and Pavol Rajniak and Yang, \{Ralph T.\}",

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doi = "10.1016/S0009-2509(99)00338-3",

language = "English",

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journal = "Chemical Engineering Science",

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note = "Proceedings of the 1998 Symposium on Non-Linear Dynamics in Chemical and Bioengineering Processes - CHISA '98 ; Conference date: 23-08-1998 Through 28-08-1998",

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TY - JOUR

T1 - On the modeling of PSA cycles with hysteresis-dependent isotherms

AU - Štěpánek, František

AU - Kubíček, Milan

AU - Marek, Miloš

AU - Šoóš, Miroslav

AU - Rajniak, Pavol

AU - Yang, Ralph T.

PY - 2000/1

Y1 - 2000/1

N2 - A four-step pressure swing adsorption (PSA) process for air drying on a silica gel dessicant is considered. The effects of hysteresis in adsorption/desorption equilibrium isotherms and of loading dependence of the effective diffusion coefficient on the process performance are investigated on a mathematical model. A comparative parametric study reveals that for identical operating conditions, hysteresis can be detrimental to product purity. Multiplicity of cyclic steady states is shown to exist as a result of hysteresis. A transient regime invoked by a gradual change in the inlet air humidity is discussed.

AB - A four-step pressure swing adsorption (PSA) process for air drying on a silica gel dessicant is considered. The effects of hysteresis in adsorption/desorption equilibrium isotherms and of loading dependence of the effective diffusion coefficient on the process performance are investigated on a mathematical model. A comparative parametric study reveals that for identical operating conditions, hysteresis can be detrimental to product purity. Multiplicity of cyclic steady states is shown to exist as a result of hysteresis. A transient regime invoked by a gradual change in the inlet air humidity is discussed.

KW - Air drying

KW - Dynamic simulation

KW - Hysteresis

KW - Multiplicity

KW - PSA

KW - Silica gel

UR - https://www.scopus.com/pages/publications/0037774373

U2 - 10.1016/S0009-2509(99)00338-3

DO - 10.1016/S0009-2509(99)00338-3

M3 - Conference article

AN - SCOPUS:0037774373

SN - 0009-2509

VL - 55

SP - 431

EP - 440

JO - Chemical Engineering Science

JF - Chemical Engineering Science

IS - 2

T2 - Proceedings of the 1998 Symposium on Non-Linear Dynamics in Chemical and Bioengineering Processes - CHISA '98

Y2 - 23 August 1998 through 28 August 1998

ER -

On the modeling of PSA cycles with hysteresis-dependent isotherms

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