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Activated Ag ions and enhanced gas transport by incorporation of KIT-6 for facilitated olefin transport membranes

Title
Activated Ag ions and enhanced gas transport by incorporation of KIT-6 for facilitated olefin transport membranes
Author
강용수
Keywords
Olefin; Facilitated transport; KIT-6; Ag; Al(NO3)(3)
Issue Date
2016-09
Publisher
ELSEVIER SCIENCE BV
Citation
JOURNAL OF MEMBRANE SCIENCE, v. 513, Page. 95-100
Abstract
Facilitated olefin transport membranes consisting of polymer/Ag salt/Al(NO3)(3) have shown long-term stability, increasing the possibility of being used in practical applications. However, even though they show excellent separation performance over a long duration, the need for significant amounts of Ag salts acts as an obstacle, owing to relatively high cost of Ag. Thus, reduction in the amount of Ag salts in the membranes is required for practical applications in the industry. However, since the separation performance is directly related to the amount of Ag salts, it has been difficult to reduce the amount of Ag salts. In this study, we succeeded in preparing polymer/Ag salts/Al(NO3)(3) membranes with 30% reduction in the amount of Ag salts by utilizing KIT-6, which is a porous material. When KIT-6 was incorporated into the polymer/Ag salts/Al(NO3)(3) membrane, the separation performance for propylene/propane mixed gas increased with a propylene over propane selectivity of 20 and mixed gas permeance of 10 GPU. These values of selectivity and permeance amounted to 154% and 133% enhancement, respectively, compared to the performance without KIT-6. The enhanced separation performance is attributed to both the coordination of hydroxyl groups in KIT-6 with Ag ions and the porous properties of KIT-6, which leads to increased diffusivity. The coordination behavior of polymer/Ag salts/Al(NO3)(3) containing KIT-6 was investigated by FT-IR, FT-Raman, and XPS analyses. (C) 2016 Elsevier B.V. All rights reserved.
URI
https://www.sciencedirect.com/science/article/pii/S0376738816302332?via%3Dihubhttp://repository.hanyang.ac.kr/handle/20.500.11754/80436
ISSN
0376-7388; 1873-3123
DOI
10.1016/j.memsci.2016.04.023
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > ENERGY ENGINEERING(에너지공학과) > Articles
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