Abstract
A SSZ-13 zeolite (CHA type zeolite having a pore size of 0.37 × 0.42 nm2) can separate CO2 (0.33 nm) from larger molecules (N2 (0.364 nm) or CH4 (0.38 nm)) because of the molecular size differences. However, methods to control the non-zeolitic defects of SSZ-13 membranes are lacking. Here, we demonstrate that rapid thermal processing (RTP) of as-synthesized SSZ-13 films tunes their microstructural defect properties and increases their CO2 separation ability. The maximum CO2/N2 separation factor (SF) at 30 °C increased from ~2.9 to ~4.8 due to RTP because the defective region was reduced. Furthermore, the addition of water vapor (the third main component of coal-fired power plant flue gas) to the feed markedly improved the CO2/N2 SF of the RTP-treated SSZ-13 membrane; from ~4.3 at 50 °C (a representative flue gas stream temperature) under dry conditions to ~10.1 under wet conditions (vs. ~1.6 across the conventionally calcined counterpart). Furthermore, the less-defective RTP-treated SSZ-13 membranes achieved a CO2/CH4 SF as high as ~43.7 under wet conditions at 50 °C. Fluorescence confocal optical microscopy analyses complemented with the permeation modeling revealed that the reduced defect size after RTP (~2.2 nm against ~3.9 nm for the conventionally calcined counterpart) improved the CO2 permselectivity, even though the defect porosities were low (~0.1%).
| Original language | English |
|---|---|
| Article number | 117342 |
| Journal | Journal of Membrane Science |
| Volume | 591 |
| DOIs | |
| Publication status | Published - 2019 Dec 1 |
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Keywords
- Biogas separations
- Post-combustion carbon capture
- Rapid thermal processing
- Secondary growth
- SSZ-13 (CHA type) zeolite film
ASJC Scopus subject areas
- Biochemistry
- Materials Science(all)
- Physical and Theoretical Chemistry
- Filtration and Separation
Cite this
Microstructural control of a SSZ-13 zeolite film via rapid thermal processing. / Kim, Jinseong; Jang, Eunhee; Hong, Sungwon; Kim, Dongjae; Kim, Eunjoo; Ricther, Hannes; Simon, Adrian; Choi, Nakwon; Korelskiy, Danil; Fouladvand, Shahpar; Nam, Jaewook; Choi, Jungkyu.
In: Journal of Membrane Science, Vol. 591, 117342, 01.12.2019.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Microstructural control of a SSZ-13 zeolite film via rapid thermal processing
AU - Kim, Jinseong
AU - Jang, Eunhee
AU - Hong, Sungwon
AU - Kim, Dongjae
AU - Kim, Eunjoo
AU - Ricther, Hannes
AU - Simon, Adrian
AU - Choi, Nakwon
AU - Korelskiy, Danil
AU - Fouladvand, Shahpar
AU - Nam, Jaewook
AU - Choi, Jungkyu
PY - 2019/12/1
Y1 - 2019/12/1
N2 - A SSZ-13 zeolite (CHA type zeolite having a pore size of 0.37 × 0.42 nm2) can separate CO2 (0.33 nm) from larger molecules (N2 (0.364 nm) or CH4 (0.38 nm)) because of the molecular size differences. However, methods to control the non-zeolitic defects of SSZ-13 membranes are lacking. Here, we demonstrate that rapid thermal processing (RTP) of as-synthesized SSZ-13 films tunes their microstructural defect properties and increases their CO2 separation ability. The maximum CO2/N2 separation factor (SF) at 30 °C increased from ~2.9 to ~4.8 due to RTP because the defective region was reduced. Furthermore, the addition of water vapor (the third main component of coal-fired power plant flue gas) to the feed markedly improved the CO2/N2 SF of the RTP-treated SSZ-13 membrane; from ~4.3 at 50 °C (a representative flue gas stream temperature) under dry conditions to ~10.1 under wet conditions (vs. ~1.6 across the conventionally calcined counterpart). Furthermore, the less-defective RTP-treated SSZ-13 membranes achieved a CO2/CH4 SF as high as ~43.7 under wet conditions at 50 °C. Fluorescence confocal optical microscopy analyses complemented with the permeation modeling revealed that the reduced defect size after RTP (~2.2 nm against ~3.9 nm for the conventionally calcined counterpart) improved the CO2 permselectivity, even though the defect porosities were low (~0.1%).
AB - A SSZ-13 zeolite (CHA type zeolite having a pore size of 0.37 × 0.42 nm2) can separate CO2 (0.33 nm) from larger molecules (N2 (0.364 nm) or CH4 (0.38 nm)) because of the molecular size differences. However, methods to control the non-zeolitic defects of SSZ-13 membranes are lacking. Here, we demonstrate that rapid thermal processing (RTP) of as-synthesized SSZ-13 films tunes their microstructural defect properties and increases their CO2 separation ability. The maximum CO2/N2 separation factor (SF) at 30 °C increased from ~2.9 to ~4.8 due to RTP because the defective region was reduced. Furthermore, the addition of water vapor (the third main component of coal-fired power plant flue gas) to the feed markedly improved the CO2/N2 SF of the RTP-treated SSZ-13 membrane; from ~4.3 at 50 °C (a representative flue gas stream temperature) under dry conditions to ~10.1 under wet conditions (vs. ~1.6 across the conventionally calcined counterpart). Furthermore, the less-defective RTP-treated SSZ-13 membranes achieved a CO2/CH4 SF as high as ~43.7 under wet conditions at 50 °C. Fluorescence confocal optical microscopy analyses complemented with the permeation modeling revealed that the reduced defect size after RTP (~2.2 nm against ~3.9 nm for the conventionally calcined counterpart) improved the CO2 permselectivity, even though the defect porosities were low (~0.1%).
KW - Biogas separations
KW - Post-combustion carbon capture
KW - Rapid thermal processing
KW - Secondary growth
KW - SSZ-13 (CHA type) zeolite film
UR - http://www.scopus.com/inward/record.url?scp=85070073181&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85070073181&partnerID=8YFLogxK
U2 - 10.1016/j.memsci.2019.117342
DO - 10.1016/j.memsci.2019.117342
M3 - Article
AN - SCOPUS:85070073181
VL - 591
JO - Jornal of Membrane Science
JF - Jornal of Membrane Science
SN - 0376-7388
M1 - 117342
ER -