Chem. J. Chinese Universities ›› 2020, Vol. 41 ›› Issue (12): 2813.doi: 10.7503/cjcu20200327
• Physical Chemistry • Previous Articles Next Articles
XIA Dunyan, PENG Li, WU Zhengqi, WANG Linzhi, JIA Yimin, ZHANG Chun, GU Xuehong()
Received:
2020-06-04
Online:
2020-12-10
Published:
2020-12-09
Contact:
GU Xuehong
E-mail:xhgu@njtech.edu.cn
CLC Number:
TrendMD:
XIA Dunyan, PENG Li, WU Zhengqi, WANG Linzhi, JIA Yimin, ZHANG Chun, GU Xuehong. Two-stage Varying-temperature Synthesis of MFI Zeolite Membrane and Their Separation Performance for Xylene Isomers[J]. Chem. J. Chinese Universities, 2020, 41(12): 2813.
Membrane | Synthetic condition | N2 permeance before detemplation/ | SF6 permeance after detemplation/ | |
---|---|---|---|---|
Temperature/℃ | Time/h | (mol·m-2·s-1·Pa-1) | (mol·m-2·s-1·Pa-1) | |
M1 | 120 | 12 | 6.26×10-7 | 1.74×10-7 |
M2 | 140 | 10 | 8.64×10-8 | 6.58×10-8 |
M3 | 160 | 8 | 2.81×10-9 | 3.64×10-8 |
M4 | 180 | 5 | 1.68×10-9 | 2.91×10-8 |
Membrane | Synthetic condition | N2 permeance before detemplation/ | SF6 permeance after detemplation/ | |
---|---|---|---|---|
Temperature/℃ | Time/h | (mol·m-2·s-1·Pa-1) | (mol·m-2·s-1·Pa-1) | |
M1 | 120 | 12 | 6.26×10-7 | 1.74×10-7 |
M2 | 140 | 10 | 8.64×10-8 | 6.58×10-8 |
M3 | 160 | 8 | 2.81×10-9 | 3.64×10-8 |
M4 | 180 | 5 | 1.68×10-9 | 2.91×10-8 |
Membrane | Synthetic condition | N2 permeance before detemplation/ | SF6 permeance after detemplation/ | |||
---|---|---|---|---|---|---|
First stage | Second stage | |||||
Temperature/℃ | Time/h | Temperature/℃ | Time/h | (mol·m-2·s-1·Pa-1) | (mol·m-2·s-1·Pa-1) | |
M5 | 120 | 9 | — | — | 1.05×10-6 | 8.22×10-7 |
M6 | 120 | 9 | 180 | 1 | 2.58×10-9 | 2.57×10-9 |
M7 | 120 | 9 | 180 | 2 | 2.16×10-9 | 2.55×10-9 |
M8 | 120 | 9 | 180 | 3 | 2.25×10-9 | 2.27×10-9 |
Membrane | Synthetic condition | N2 permeance before detemplation/ | SF6 permeance after detemplation/ | |||
---|---|---|---|---|---|---|
First stage | Second stage | |||||
Temperature/℃ | Time/h | Temperature/℃ | Time/h | (mol·m-2·s-1·Pa-1) | (mol·m-2·s-1·Pa-1) | |
M5 | 120 | 9 | — | — | 1.05×10-6 | 8.22×10-7 |
M6 | 120 | 9 | 180 | 1 | 2.58×10-9 | 2.57×10-9 |
M7 | 120 | 9 | 180 | 2 | 2.16×10-9 | 2.55×10-9 |
M8 | 120 | 9 | 180 | 3 | 2.25×10-9 | 2.27×10-9 |
Membrane | Synthtic condition | PX permeance/ (mol·m-2·s-1·Pa-1) | OX permeance/ (mol·m-2·s-1·Pa-1) | Separation factor |
---|---|---|---|---|
M3 | 160 ℃, 8 h | 2.22×10-8 | 1.84×10-8 | 1.2 |
M4 | 180 ℃, 5 h | 1.45×10-8 | 7.68×10-9 | 1.8 |
M8 | 120 ℃, 9 h+180 ℃, 3 h | 9.57×10-9 | 2.27×10-10 | 42 |
M9 | 130 ℃, 9 h+180 ℃, 3 h | 6.00×10-9 | 5.48×10-10 | 11 |
M10 | 140 ℃, 9 h+180 ℃, 3 h | 8.62×10-9 | 2.76×10-9 | 3.1 |
M11 | 120 ℃, 9 h+160 ℃, 3 h | 8.42×10-9 | 2.34×10-9 | 3.6 |
M12 | 120 ℃, 9 h+200 ℃, 3 h | 1.55×10-8 | 2.95×10-9 | 5.3 |
Membrane | Synthtic condition | PX permeance/ (mol·m-2·s-1·Pa-1) | OX permeance/ (mol·m-2·s-1·Pa-1) | Separation factor |
---|---|---|---|---|
M3 | 160 ℃, 8 h | 2.22×10-8 | 1.84×10-8 | 1.2 |
M4 | 180 ℃, 5 h | 1.45×10-8 | 7.68×10-9 | 1.8 |
M8 | 120 ℃, 9 h+180 ℃, 3 h | 9.57×10-9 | 2.27×10-10 | 42 |
M9 | 130 ℃, 9 h+180 ℃, 3 h | 6.00×10-9 | 5.48×10-10 | 11 |
M10 | 140 ℃, 9 h+180 ℃, 3 h | 8.62×10-9 | 2.76×10-9 | 3.1 |
M11 | 120 ℃, 9 h+160 ℃, 3 h | 8.42×10-9 | 2.34×10-9 | 3.6 |
M12 | 120 ℃, 9 h+200 ℃, 3 h | 1.55×10-8 | 2.95×10-9 | 5.3 |
Membrane | Synthetic condition | Detemplation condition | PX permeance/ (mol·m-2·s-1·Pa-1) | OX permeance/ (mol·m-2·s-1·Pa-1) | Separation factor |
---|---|---|---|---|---|
M4 | 180 ℃, 5 h | 450 ℃, 8 h | 1.45×10-8 | 7.68×10-9 | 1.8 |
M13 | 180 ℃, 5 h | 200 ℃, 6 h | 7.82×10-9 | 3.84×10-10 | 20 |
M8 | 120 ℃, 9 h+180 ℃, 3 h | 450 ℃, 8 h | 9.57×10-9 | 2.27×10-10 | 42 |
M14 | 120 ℃, 9 h+180 ℃, 3 h | 200 ℃, 6 h | 1.02×10-8 | 1.36×10-10 | 76 |
Membrane | Synthetic condition | Detemplation condition | PX permeance/ (mol·m-2·s-1·Pa-1) | OX permeance/ (mol·m-2·s-1·Pa-1) | Separation factor |
---|---|---|---|---|---|
M4 | 180 ℃, 5 h | 450 ℃, 8 h | 1.45×10-8 | 7.68×10-9 | 1.8 |
M13 | 180 ℃, 5 h | 200 ℃, 6 h | 7.82×10-9 | 3.84×10-10 | 20 |
M8 | 120 ℃, 9 h+180 ℃, 3 h | 450 ℃, 8 h | 9.57×10-9 | 2.27×10-10 | 42 |
M14 | 120 ℃, 9 h+180 ℃, 3 h | 200 ℃, 6 h | 1.02×10-8 | 1.36×10-10 | 76 |
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