Abstract
Adsorption fixed bed models are of paramount importance in chemical and environmental engineering research. Although the related literature is rich, the vast majority of models employed are either phenomenological, based on chemical reaction kinetics, or limited to systems that obey simple equilibrium isotherms (favorable, unfavorable, linear, and rectangular) combined to linear driving force (LDF) for the solid-phase mass transfer kinetics and ideal plug flow. This paper complements the existing studies by presenting and analyzing a versatile nondimensional fixed bed model equipped with diffusion-based mass transfer kinetics and nonideal flow terms and adapted to deal with S-shaped (sigmoidal) isotherms. A discussion is conducted on the rather unusual fixed bed dynamics produced by systems that follow S-shaped isotherms, a subject which has been rarely and nonsystematically discussed in the related literature. Thus, this study aims at providing better understanding of the interactions of S-shaped isotherms, mass transfer, and axial dispersion on the shape of adsorption fixed bed breakthrough curves and comes to clarify and complement previously published results, especially on the unexplored effects of the isotherms’ inflection point on the breakthrough curves.
| Original language | English |
|---|---|
| Pages (from-to) | 1-19 |
| Number of pages | 19 |
| Journal | Chemical Engineering Communications |
| DOIs | |
| Publication status | Accepted/In press - Sep 21 2017 |
Fingerprint
Keywords
- Adsorption
- fixed bed modeling
- ion exchange
- S-shaped isotherms
ASJC Scopus subject areas
- Chemistry(all)
- Chemical Engineering(all)
Cite this
Adsorption fixed beds modeling revisited : Generalized solutions for S-shaped isotherms. / Inglezakis, V. J.; Fyrillas, M. M.
In: Chemical Engineering Communications, 21.09.2017, p. 1-19.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Adsorption fixed beds modeling revisited
T2 - Generalized solutions for S-shaped isotherms
AU - Inglezakis, V. J.
AU - Fyrillas, M. M.
PY - 2017/9/21
Y1 - 2017/9/21
N2 - Adsorption fixed bed models are of paramount importance in chemical and environmental engineering research. Although the related literature is rich, the vast majority of models employed are either phenomenological, based on chemical reaction kinetics, or limited to systems that obey simple equilibrium isotherms (favorable, unfavorable, linear, and rectangular) combined to linear driving force (LDF) for the solid-phase mass transfer kinetics and ideal plug flow. This paper complements the existing studies by presenting and analyzing a versatile nondimensional fixed bed model equipped with diffusion-based mass transfer kinetics and nonideal flow terms and adapted to deal with S-shaped (sigmoidal) isotherms. A discussion is conducted on the rather unusual fixed bed dynamics produced by systems that follow S-shaped isotherms, a subject which has been rarely and nonsystematically discussed in the related literature. Thus, this study aims at providing better understanding of the interactions of S-shaped isotherms, mass transfer, and axial dispersion on the shape of adsorption fixed bed breakthrough curves and comes to clarify and complement previously published results, especially on the unexplored effects of the isotherms’ inflection point on the breakthrough curves.
AB - Adsorption fixed bed models are of paramount importance in chemical and environmental engineering research. Although the related literature is rich, the vast majority of models employed are either phenomenological, based on chemical reaction kinetics, or limited to systems that obey simple equilibrium isotherms (favorable, unfavorable, linear, and rectangular) combined to linear driving force (LDF) for the solid-phase mass transfer kinetics and ideal plug flow. This paper complements the existing studies by presenting and analyzing a versatile nondimensional fixed bed model equipped with diffusion-based mass transfer kinetics and nonideal flow terms and adapted to deal with S-shaped (sigmoidal) isotherms. A discussion is conducted on the rather unusual fixed bed dynamics produced by systems that follow S-shaped isotherms, a subject which has been rarely and nonsystematically discussed in the related literature. Thus, this study aims at providing better understanding of the interactions of S-shaped isotherms, mass transfer, and axial dispersion on the shape of adsorption fixed bed breakthrough curves and comes to clarify and complement previously published results, especially on the unexplored effects of the isotherms’ inflection point on the breakthrough curves.
KW - Adsorption
KW - fixed bed modeling
KW - ion exchange
KW - S-shaped isotherms
UR - http://www.scopus.com/inward/record.url?scp=85029722283&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85029722283&partnerID=8YFLogxK
U2 - 10.1080/00986445.2017.1364240
DO - 10.1080/00986445.2017.1364240
M3 - Article
AN - SCOPUS:85029722283
SP - 1
EP - 19
JO - Chemical Engineering Communications
JF - Chemical Engineering Communications
SN - 0098-6445
ER -