Chem. J. Chinese Universities ›› 2025, Vol. 46 ›› Issue (2): 20240411.doi: 10.7503/cjcu20240411
• Physical Chemistry • Previous Articles Next Articles
BAI Xiaowei, TANG Xuan, WANG Yating, ZHANG Feifei, LI Jinping, YANG Jiangfeng()
Received:
2024-08-30
Online:
2025-02-10
Published:
2024-10-21
Contact:
YANG Jiangfeng
E-mail:yangjiangfeng@tyut.edu.cn
Supported by:
CLC Number:
TrendMD:
BAI Xiaowei, TANG Xuan, WANG Yating, ZHANG Feifei, LI Jinping, YANG Jiangfeng. K+ Regulation of MER Zeolite and Its Effect on O2 and N2 Adsorption Kinetics[J]. Chem. J. Chinese Universities, 2025, 46(2): 20240411.
Sample | Amount of K2O, x | K/Si molar ratio | Unit cell composition | |
---|---|---|---|---|
K⁃MER⁃0.35 | 2.000 | 0.35 | K8.6|[Al8.6Si23.4O64.0] | |
K⁃MER⁃0.41 | 2.250 | 0.41 | K9.1|Al9.1Si22.9O64.0] | |
K⁃MER⁃0.43 | 2.625 | 0.43 | K9.5|[Al9.5Si22.5O64.0] |
Table 1 Amount of K2O(x) in MER gels and the K/Si molar ratios of the products
Sample | Amount of K2O, x | K/Si molar ratio | Unit cell composition | |
---|---|---|---|---|
K⁃MER⁃0.35 | 2.000 | 0.35 | K8.6|[Al8.6Si23.4O64.0] | |
K⁃MER⁃0.41 | 2.250 | 0.41 | K9.1|Al9.1Si22.9O64.0] | |
K⁃MER⁃0.43 | 2.625 | 0.43 | K9.5|[Al9.5Si22.5O64.0] |
O2 | N2 | ||||
---|---|---|---|---|---|
k1/min-1 | R2 | k1/min-1 | R2 | ||
K⁃MER⁃0.35 | 0.2261 | 0.96 | 0.1485 | 0.98 | |
K⁃MER⁃0.41 | 0.1549 | 0.97 | 0.0478 | 0.99 | |
K⁃MER⁃0.43 | 0.0599 | 0.99 | 0.0347 | 0.95 |
Table 2 Pseudo-first-order kinetic model fitting parameters for K-MER N2 and O2 adsorption kinetics
O2 | N2 | ||||
---|---|---|---|---|---|
k1/min-1 | R2 | k1/min-1 | R2 | ||
K⁃MER⁃0.35 | 0.2261 | 0.96 | 0.1485 | 0.98 | |
K⁃MER⁃0.41 | 0.1549 | 0.97 | 0.0478 | 0.99 | |
K⁃MER⁃0.43 | 0.0599 | 0.99 | 0.0347 | 0.95 |
Temperature/K | O2 | N2 | |||
---|---|---|---|---|---|
k1/min-1 | R2 | k1/min-1 | R2 | ||
273 | 0.0705 | 0.99 | 0.0335 | 0.95 | |
298 | 0.1189 | 0.96 | 0.0412 | 0.98 | |
313 | 0.2096 | 0.96 | 0.0916 | 0.98 |
Table 3 Pseudo-first-order kinetic model fitting parameters for K-MER-0.41 N2 and O2 adsorption kinetics at different temperatures
Temperature/K | O2 | N2 | |||
---|---|---|---|---|---|
k1/min-1 | R2 | k1/min-1 | R2 | ||
273 | 0.0705 | 0.99 | 0.0335 | 0.95 | |
298 | 0.1189 | 0.96 | 0.0412 | 0.98 | |
313 | 0.2096 | 0.96 | 0.0916 | 0.98 |
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