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Design and Evaluation of New Mixed-Matrix Membranes for CO 2/CH4 Separations.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Design and Evaluation of New Mixed-Matrix Membranes for CO 2/CH4 Separations./
Author:	Singh, Zoban Veer.
Description:	1 online resource (154 pages)
Notes:	Source: Dissertation Abstracts International, Volume: 79-07(E), Section: B.
Contained By:	Dissertation Abstracts International79-07B(E).
Subject:	Chemical engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9780355543339

Design and Evaluation of New Mixed-Matrix Membranes for CO 2/CH4 Separations.
Singh, Zoban Veer.

Design and Evaluation of New Mixed-Matrix Membranes for CO 2/CH4 Separations. - 1 online resource (154 pages)

Source: Dissertation Abstracts International, Volume: 79-07(E), Section: B.

Thesis (Ph.D.)--University of Colorado at Boulder, 2017.

Includes bibliographical references

Many polymeric materials are mechanically robust and thus can be used to form membranes for CO2/CH4 separations. Most of these polymers, however, do not have sufficiently high CO2 permeabilities and CO2/CH4 selectivities. Some microporous solids have a high CO2/CH4 adsorption selectivity, and CO2 diffuses fast in their pores, but the synthesis scale-up of thin membranes formed from these materials is difficult. Small particles of such microporous solids can be embedded in a polymeric matrix to form mechanically stable mixed-matrix membranes (MMMs). In this work, three new types of defect-free mixed-matrix membranes with both high CO2 permeabilities and CO 2/CH4 selectivities were synthesized by combining three organic and inorganic microporous solids with different polymers.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9780355543339Subjects--Topical Terms:

555952
Chemical engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Design and Evaluation of New Mixed-Matrix Membranes for CO 2/CH4 Separations.
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245 1 0 $a Design and Evaluation of New Mixed-Matrix Membranes for CO 2/CH4 Separations.
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300 $a 1 online resource (154 pages)
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500 $a Source: Dissertation Abstracts International, Volume: 79-07(E), Section: B.
500 $a Advisers: Rich D. Noble; Douglas L. Gin.
502 $a Thesis (Ph.D.)--University of Colorado at Boulder, 2017.
504 $a Includes bibliographical references
520 $a Many polymeric materials are mechanically robust and thus can be used to form membranes for CO2/CH4 separations. Most of these polymers, however, do not have sufficiently high CO2 permeabilities and CO2/CH4 selectivities. Some microporous solids have a high CO2/CH4 adsorption selectivity, and CO2 diffuses fast in their pores, but the synthesis scale-up of thin membranes formed from these materials is difficult. Small particles of such microporous solids can be embedded in a polymeric matrix to form mechanically stable mixed-matrix membranes (MMMs). In this work, three new types of defect-free mixed-matrix membranes with both high CO2 permeabilities and CO 2/CH4 selectivities were synthesized by combining three organic and inorganic microporous solids with different polymers.
520 $a Room-temperature ionic liquid (RTIL)-based materials formed the matrix for the zeolites SAPO-34 and SSZ-13 that have been shown to be selective for the separation of CO2 from CH4. The structures of the polymerized RTIL (poly(RTIL)) materials were modified to achieve CO2 /CH4 separation that surpassed the Robeson upper bound. The interface between the zeolite particles and the surrounding poly(RTIL)-matrix that often causes non-selective transport or pore blocking in other MMMs was optimized by adding free RTILs to obtain mechanically stable membranes with high solid loadings and good separation performance.
520 $a Novel pillar[5]arene supra-molecular organic framework (P5-SOF) particles were used to form defect-free MMMs by solvent-casting with Matrimid-5218(TM), a commercially available uncharged polymer. These all-organic MMMs had very high CO2/CH4 selectivities that surpassed the Robeson upper bound but permeances were low. The CO2 permeability of these membranes was improved by adding different low-vapor-pressure liquids during membrane formation to optimize the interface between the polymer matrix and the P5-SOF particles. MMMs containing n-dodecane as the interfacing agent displayed the largest enhancements in CO2 permeability while also maintaining high CO2/CH4 selectivity.
520 $a In this thesis work, we gained a new fundamental understanding of the microstructure of MMMs to optimize their transport properties for CO 2/CH4 gas separation. The chemical compatibility between the different components of the membrane used in this study, polymer-solid interfacing, and particle loading all strongly affected the separation performance. Defect-free MMMs that are mechanically stable with separation properties that exceed those of other types of MMM's were synthesized and these membranes show potential for scale-up and commercialization.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Chemical engineering. $3 555952
655 7 $a Electronic books. $2 local $3 554714
690 $a 0542
710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a University of Colorado at Boulder. $b Chemical Engineering. $3 1182283
773 0 $t Dissertation Abstracts International $g 79-07B(E).
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10640847 $z click for full text (PQDT)