Adsorption fixed beds modeling revisited: Generalized solutions for S-shaped isotherms
| Autor: | Marios M. Fyrillas, Vassilis J. Inglezakis |
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| Rok vydání: | 2017 |
| Předmět: |
Plug flow
Fixed bed Chemistry General Chemical Engineering Kinetics Thermodynamics 02 engineering and technology General Chemistry Mechanics 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences 0104 chemical sciences Adsorption Chemical reaction kinetics Flow (mathematics) Mass transfer Diffusion (business) 0210 nano-technology |
| Zdroj: | Chemical Engineering Communications. 204:1299-1317 |
| ISSN: | 1563-5201 0098-6445 |
| DOI: | 10.1080/00986445.2017.1364240 |
| Popis: | 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... |
| Databáze: | OpenAIRE |
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