Supplementary Information

Supplementary Information is available from the Journal of Membrane Science or from the author.

Funding

This work was supported by Institute Research Program of Korea Research Institute of Chemical Technology (KRICT), KK-1702-B20; and by the Global Excellent Technology Innovation of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) (No. 20135010100750) under the Ministry of Trade.

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A Zeolite Membrane Module Composed of SAPO-34 Hollow Fibers for Use in Fluorinated Gas Enrichment

Pyung Soo Lee a,b,*, Min Soo Lim a, Ahrumi Park a, Hosik Park a,b, Seung-Eun Nam a, and You-in Park a,b,*

a. Advanced Materials Division, Center for Membranes, Korea Research Institute of Chemical Technology, P.O. Box 107, Yuseong-gu, Daejeon 305-606, Republic of Korea

b. University of Science & Technology (UST), 176 Gajung-dong, Yuseong-gu, Daejeon 305-350, Republic of Korea

* Corresponding authors: Pyung Soo Lee: zeolite@krict.re.kr

T. +82-42-860-7549, Fax. +82-42-860-7283

You-In Park: yipark@krict.re.kr

T. +82-42-860-7241, Fax. +82-42-860-7283

Figure A1

Figure A1. Schematic of NF3 enrichment system.

Figure A2

Figure A2. SEM images of surface of alumina disk after secondary growth. Surface of alumina disks after a) 5 h, b) 10 h, and c) 24 h at 180 °C. The gel composition was 1.0 Al2O3 : 1.0 P2O5 : 0.4 SiO2 : 1.0 TEAOH : 1.6 DPA : 160 H2O, and the synthesis was carried out at 180 °C under varying reaction time. Scale bars in a), b), and c) represent 15 μm.

Figure A3

Figure A3. SEM images of cleaned alumina hollow fibers after hydrothermal synthesis at 180°C for 6 h. Alumina hollow fibers were immersed in 10% HF solution for 24 h to remove impurities before hydrothermal synthesis. a) outer surface of the hollow fiber and b) inner surface of the hollow fiber. Scale bars in a) and b) represent 30 μm.

Figure A4

Figure A4. SEM images of alumina hollow fiber using low-graded alumina powder after sintering at 1,450 °C. a) Top view of an alumina hollow fiber, b) its high magnification view. c) EDS spectra of alumina hollow fiber, and d) Element maps for C, O, Al, and Pt. Scale bars in a) represent 2 mm and in b) represent 80 μm.

Figure A5

Figure A5. Cross-sectional view of SAPO-34 membrane formed on the inside of hollow fiber membranes after in-situ growth. Growth for a) 5 h, b) 10 h, and c) 24 h. Scale bars in a) b), and c) represent 15 μm.

Figure A6

Figure A6. XRD diffraction of SAPO-34 crystal.

Figure A7

Figure A7. A lab-scale NF3 enrichment system consisting of commercial polysulfone membranes. a) photo of NF3 enrichment system and b) its schematic flow diagram. The total membrane area needed for this system was 15 m2.

Figure A8

Figure A8. Separation performances of membranes toward N2/NF3 separation reported in the literature.1,2

1. Park, S.; Kang, W. R.; Kwon, H. T.; Kim, S.; Seo, M.; Bang, J.; Lee, S. h.; Jeong, H. K.; Lee, J. S., The polymeric upper bound for N2/NF3 separation and beyond; ZIF-8 containing mixed matrix membranes. Journal of Membrane Science 2015, 486, 29-39.

2. Kim, S.-J.; Park, Y.-I.; Nam, S.-E.; Park, H.; Lee, P. S., Separations of F-gases from nitrogen through thin carbon membranes. Separation and Purification Technology 2016, 158, 108-114