1. AlPO-18 membranes for CO2/CH4 and N2/CH4 separations.
- Author
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Liu, Wen, Tu, Ying, Lu, Jun, Liu, Yinuo, Wu, Ting, Gui, Tian, Chen, Xiangshu, and Kita, Hidetoshi
- Subjects
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SEPARATION of gases , *MICROPOROSITY , *GAS mixtures , *GAS separation membranes , *CARBON dioxide , *CRYSTAL surfaces , *THIN films - Abstract
Microporous aluminophosphates are promising materials for gas separation, but their industrial applications are still challenging due to the permeability-selectivity "trade-off" behavior. A new approach is now reported by the addition of single novel template N, N -diisopropylethylamine (DIPEA) into the gel precursor to prepare the pure AlPO-18 membrane with both high permeance and selectivity. It was identified that the AlPO-18 membrane possessed small plate-like crystals on support surface. The single and mixed CO 2 /CH 4 and N 2 /CH 4 gas separations were measured. The best membrane exhibited high CO 2 and N 2 permeances of 9.2, 0.91 × 10−7 mol m−2 s−1∙Pa−1 under the two-component gas mixture, and the mixture selectivities in CO 2 /CH 4 and N 2 /CH 4 were 93 and 6.0 at 303 K and 0.2 MPa, respectively. This strategy not only demonstrated a potential zeolite membrane material for gas separation but also furnished ideas for the preparation of high permeable thin films. [Display omitted] • High gas separation performance AlPO-18 membrane was obtained with DIPEA template. • The effect of DIPEA content was investigated. • The AlPO-18 membrane showed the CO 2 /CH 4 separation performance of 93 with the CO 2 permeance of 9.2 × 10−7 mol m−2 s−1∙Pa−1. [ABSTRACT FROM AUTHOR]
- Published
- 2023
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