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Membrane separation process analysis and design strategies based on thermodynamic efficiency of permeation

Identifieur interne : 001C62 ( Main/Exploration ); précédent : 001C61; suivant : 001C63

Membrane separation process analysis and design strategies based on thermodynamic efficiency of permeation

Auteurs : Jianguo Xu [États-Unis] ; Rakesh Agrawal [États-Unis]

Source :

Chemical Engineering Science [ 0009-2509 ] ; 1996.

RBID : ISTEX:1E7624ED86BC5BE10FFBE4B867867930A0DD1894

English descriptors

Teeft :
- Absolute values, Actual work, Agrawal, Binary, Binary mixtures, Carbon monoxide, Cascade, Continuous membrane column, Corresponding values, Design strategies, Efficiency function, Efficiency improvement, Energy consumption, Example problem, Exergy loss, Feed pressure, Feed stream, Finite value, Fractional, Fractional area, Gaseous separation processes, High pressure feed, High pressure side, High purity, Higher value, Lower pressure side, Membrane, Membrane area, Membrane cascade, Membrane element, Membrane section, Membrane selectivity, Membrane separation process, Membrane separation process analysis, Membrane separation processes, Membrane separator, Membrane separators, Membrane stage, Minimum work, Mole, Mole fraction, Multistage compressor, Negative values, Nonpermeate, Nonpermeate stream, Nonpermeate streams, Optimal pressure ratio, Optimum pressure ratio, Optimum pressure ratios, Other hand, Other side, Overall efficiency, Overall performance, Permeability, Permeation, Permeation approaches, Permeation process, Power consumption, Pressure ratio, Pressure ratios, Pressure side, Product stream, Product streams, Right portion, Selectivity, Separation, Separation process, Separation task, Separator, Simple membrane separator, Sweep stream, Thermodynamic, Thermodynamic efficiency, Wide range.

Abstract

Abstract: In this paper, local thermodynamic efficiency of permeation of a membrane element is introduced and used as a tool to provide insights into the effects of various operating parameters on the performance of a membrane gas separation process. The local thermodynamic efficiency of permeation is a function of membrane selectivity and the pressure ratio across the membrane and is independent of the absolute values of permeabilities and the pressures on either side of the membrane. The local thermodynamic efficiency of permeation analysis provides an indication of the efficiency of separation at each location within a membrane separator. It not only identifies low-efficiency zones but for binary mixtures it also provides an estimate of the potential for efficiency improvement if the local pressure ratios across the membrane could be altered. It also gives an insight into the impact of a sweep stream on the efficiency of a membrane separator and provides guidance on how the pressure ratios should be adjusted to maintain overall high efficiency. This analysis sheds some light on the performance of continuous membrane columns; and it also shows why polymeric film membranes are less than adequate for the production of extremely high-purity products. It is expected to be a very useful tool for optimal design of membrane separation processes.

Url:

https://api.istex.fr/ark:/67375/6H6-SZVLP76M-4/fulltext.pdf

DOI: 10.1016/0009-2509(95)00262-6

Affiliations:

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Le document en format XML

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<term>Binary</term>
<term>Binary mixtures</term>
<term>Carbon monoxide</term>
<term>Cascade</term>
<term>Continuous membrane column</term>
<term>Corresponding values</term>
<term>Design strategies</term>
<term>Efficiency function</term>
<term>Efficiency improvement</term>
<term>Energy consumption</term>
<term>Example problem</term>
<term>Exergy loss</term>
<term>Feed pressure</term>
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<term>Fractional area</term>
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<term>High purity</term>
<term>Higher value</term>
<term>Lower pressure side</term>
<term>Membrane</term>
<term>Membrane area</term>
<term>Membrane cascade</term>
<term>Membrane element</term>
<term>Membrane section</term>
<term>Membrane selectivity</term>
<term>Membrane separation process</term>
<term>Membrane separation process analysis</term>
<term>Membrane separation processes</term>
<term>Membrane separator</term>
<term>Membrane separators</term>
<term>Membrane stage</term>
<term>Minimum work</term>
<term>Mole</term>
<term>Mole fraction</term>
<term>Multistage compressor</term>
<term>Negative values</term>
<term>Nonpermeate</term>
<term>Nonpermeate stream</term>
<term>Nonpermeate streams</term>
<term>Optimal pressure ratio</term>
<term>Optimum pressure ratio</term>
<term>Optimum pressure ratios</term>
<term>Other hand</term>
<term>Other side</term>
<term>Overall efficiency</term>
<term>Overall performance</term>
<term>Permeability</term>
<term>Permeation</term>
<term>Permeation approaches</term>
<term>Permeation process</term>
<term>Power consumption</term>
<term>Pressure ratio</term>
<term>Pressure ratios</term>
<term>Pressure side</term>
<term>Product stream</term>
<term>Product streams</term>
<term>Right portion</term>
<term>Selectivity</term>
<term>Separation</term>
<term>Separation process</term>
<term>Separation task</term>
<term>Separator</term>
<term>Simple membrane separator</term>
<term>Sweep stream</term>
<term>Thermodynamic</term>
<term>Thermodynamic efficiency</term>
<term>Wide range</term>
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<front><div type="abstract" xml:lang="en">Abstract: In this paper, local thermodynamic efficiency of permeation of a membrane element is introduced and used as a tool to provide insights into the effects of various operating parameters on the performance of a membrane gas separation process. The local thermodynamic efficiency of permeation is a function of membrane selectivity and the pressure ratio across the membrane and is independent of the absolute values of permeabilities and the pressures on either side of the membrane. The local thermodynamic efficiency of permeation analysis provides an indication of the efficiency of separation at each location within a membrane separator. It not only identifies low-efficiency zones but for binary mixtures it also provides an estimate of the potential for efficiency improvement if the local pressure ratios across the membrane could be altered. It also gives an insight into the impact of a sweep stream on the efficiency of a membrane separator and provides guidance on how the pressure ratios should be adjusted to maintain overall high efficiency. This analysis sheds some light on the performance of continuous membrane columns; and it also shows why polymeric film membranes are less than adequate for the production of extremely high-purity products. It is expected to be a very useful tool for optimal design of membrane separation processes.</div>
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Membrane separation process analysis and design strategies based on thermodynamic efficiency of permeation

Membrane separation process analysis and design strategies based on thermodynamic efficiency of permeation

Source :

English descriptors

Abstract

Links toward previous steps (curation, corpus...)

Le document en format XML

Pour manipuler ce document sous Unix (Dilib)

Pour mettre un lien sur cette page dans le réseau Wicri