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Transport and separation of gas mixt...

MolaaiNezhad, Khadijeh.

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Transport and separation of gas mixtures through carbon molecular sieve membranes at subcritical and supercritical conditions.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Transport and separation of gas mixtures through carbon molecular sieve membranes at subcritical and supercritical conditions./
Author:	MolaaiNezhad, Khadijeh.
Description:	208 p.
Notes:	Source: Dissertation Abstracts International, Volume: 68-03, Section: B, page: 1787.
Contained By:	Dissertation Abstracts International68-03B.
Subject:	Engineering, Chemical. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3257823
ISBN:	9781109957846

Transport and separation of gas mixtures through carbon molecular sieve membranes at subcritical and supercritical conditions.
MolaaiNezhad, Khadijeh.

Transport and separation of gas mixtures through carbon molecular sieve membranes at subcritical and supercritical conditions. - 208 p.

Source: Dissertation Abstracts International, Volume: 68-03, Section: B, page: 1787.

Thesis (Ph.D.)--University of Southern California, 2006.

The investigation of the fundamental understanding of a combined membrane/supercritical separation process is the goal for this study. Analysis and presentation of the permeation data provide information about the performance of this advanced separation process. There are tremendous potential advantages to reap using supercritical fluid solvents for membrane separations. The solute molecules can have solubility in the supercritical fluids approaching those seen in liquids, while the mass transfer coefficients of the solutes can be comparable to that seen in gaseous solvents. Therefore, membrane fouling could be diminished while mass transfer limited separations could be enhanced using a supercritical fluid solvent process.

ISBN: 9781109957846Subjects--Topical Terms:

1018531
Engineering, Chemical.

Transport and separation of gas mixtures through carbon molecular sieve membranes at subcritical and supercritical conditions.
LDR:03391nam a2200301 4500 001 1963583
005 20141007080148.5
008 150210s2006 ||||||||||||||||| ||eng d
020 $a 9781109957846
035 $a (MiAaPQ)AAI3257823
035 $a AAI3257823
040 $a MiAaPQ $c MiAaPQ
100 1 $a MolaaiNezhad, Khadijeh. $3 2099869
245 1 0 $a Transport and separation of gas mixtures through carbon molecular sieve membranes at subcritical and supercritical conditions.
300 $a 208 p.
500 $a Source: Dissertation Abstracts International, Volume: 68-03, Section: B, page: 1787.
500 $a Adviser: Katherine Shing.
502 $a Thesis (Ph.D.)--University of Southern California, 2006.
520 $a The investigation of the fundamental understanding of a combined membrane/supercritical separation process is the goal for this study. Analysis and presentation of the permeation data provide information about the performance of this advanced separation process. There are tremendous potential advantages to reap using supercritical fluid solvents for membrane separations. The solute molecules can have solubility in the supercritical fluids approaching those seen in liquids, while the mass transfer coefficients of the solutes can be comparable to that seen in gaseous solvents. Therefore, membrane fouling could be diminished while mass transfer limited separations could be enhanced using a supercritical fluid solvent process.
520 $a The long-term goal is to achieve reliable engineering and design of improved membranes which can be used to remove solutes continuously from supercritical solvents such as carbon dioxide. Utilization of such membranes would produce significant reductions in operating costs compared with the energy-intensive expansion/re-compression cycle conventionally utilized in order to separate solutes from supercritical solvents.
520 $a In this study, a high-pressure permeation system that permits reliable testing of membranes for supercritical applications was designed and constructed. Techniques for preparation and characterization of carbon membranes effective in gas separations under high pressure and high temperature conditions were developed. Experimentally observed transport properties and separation efficacy were related and correlated with membrane structure. The experimental results and mathematical analysis of single gas transport based on Maxwell-Stefan formulations through membrane under sub-critical and supercritical conditions were presented. The model shows deviation of experimental data at high pressure.
520 $a Several hydrocarbon/carbon-dioxide mixture systems were studied. Methane, ethane, propane and hexane were chosen to examine the effect of molecular size on the separation performance. The effect of temperature and pressure on the permeation properties in the sub critical and supercritical regimes was studied. A key observation from the data is that the amount of adsorption increases as the hydrocarbon molecular weight increases. For the carbon membranes studied, the absorbed hydrocarbon can block the CO2 permeation through the pores especially at lower temperatures.
590 $a School code: 0208.
650 4 $a Engineering, Chemical. $3 1018531
690 $a 0542
710 2 $a University of Southern California. $3 700129
773 0 $t Dissertation Abstracts International $g 68-03B.
790 $a 0208
791 $a Ph.D.
792 $a 2006
793 $a English
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3257823