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Polymeric membranes for super critic...

Georgia Institute of Technology.

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Polymeric membranes for super critical carbon dioxide separations.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Polymeric membranes for super critical carbon dioxide separations./
作者:	Kosuri, Madhava R.
面頁冊數:	184 p.
附註:	Adviser: William J. Koros.
Contained By:	Dissertation Abstracts International70-06B.
標題:	Engineering, Chemical. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3364231
ISBN:	9781109245684

Polymeric membranes for super critical carbon dioxide separations.
Kosuri, Madhava R.

Polymeric membranes for super critical carbon dioxide separations. - 184 p.

Adviser: William J. Koros.

Thesis (Ph.D.)--Georgia Institute of Technology, 2009.

Providing an energy efficient recycle for the TeflonRTM synthesis process is of great interest due to environmental and economic reasons. This recycle step involves separating CO2 from a stream containing scCO2 and valuable monomer (C2F4). Membranes provide economical and environmental friendly separations compared to conventional methods (e.g. distillation, amine absorption). Therefore, I am investigating membrane materials that are well-suited for this important separation.

ISBN: 9781109245684Subjects--Topical Terms:

1018531
Engineering, Chemical.

Polymeric membranes for super critical carbon dioxide separations.
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245 1 0 $a Polymeric membranes for super critical carbon dioxide separations.
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500 $a Adviser: William J. Koros.
500 $a Source: Dissertation Abstracts International, Volume: 70-06, Section: B, page: .
502 $a Thesis (Ph.D.)--Georgia Institute of Technology, 2009.
520 $a Providing an energy efficient recycle for the TeflonRTM synthesis process is of great interest due to environmental and economic reasons. This recycle step involves separating CO2 from a stream containing scCO2 and valuable monomer (C2F4). Membranes provide economical and environmental friendly separations compared to conventional methods (e.g. distillation, amine absorption). Therefore, I am investigating membrane materials that are well-suited for this important separation.
520 $a Developing a robust membrane that can withstand the aggressive scCO 2 environment (&sim;1070 psi of CO2) is a key challenge. Supercritical CO2 swells traditional polymeric membrane materials, thereby increasing segmental mobility of the polymer chains which leads to a decrease in separation capacity. There have been no polymeric membrane materials identified in the literature which are suitable for this separation. In this work, I have identified an advanced polymer, TorlonRTM (a polyamide-imide), that solves this problem.
520 $a After determining the appropriate material, it is important to choose a membrane morphology that is industrially desirable. The asymmetric hollow fiber membrane morphology provides the highest productivity compared to other membrane types. I have successfully produced defect-free asymmetric hollow fiber membranes using TorlonRTM that withstand high pressure feeds. These membranes have been shown to provide selective separations under scCO2 conditions without being plasticized.
520 $a To further improve the separation performance of TorlonRTM membranes, the mixed matrix concept was explored. Zeolite 4A, which is relatively more permeable and selective compared to TorlonRTM, was chosen as the sieve material. Mixed matrix membranes from TorlonRTM and zeolite 4A were made and their separation performance was measured. Based on these experimental measurements and Maxwell modeling, challenges in making successful mixed matrix membranes were identified and feasible solutions for these challenges are suggested.
590 $a School code: 0078.
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