Ultra-permeable high-selective SAPO-34 membranes for efficient CO2 capture

Bin Wang, Weijie Huang, Yancai Zhu, Rongfei Zhou, Weihong Xing

科研成果: 期刊稿件文章同行评审

15 引用 (Scopus)

摘要

Ultra-permeable SAPO-34 membranes with membrane thickness of 0.8–1.2 μm were reproducibly fabricated using diluted mother liquids with H2O/Al2O3 ratios of 300 and 450. The orientation and thickness of the membranes were greatly affected by mother liquid dilution. Thickness-even SAPO-34 membranes were reproducibly prepared in a large synthesis time window, indicating that membrane synthesis had good robustness and it is suitable to the scale-up fabrication. The membranes prepared at H2O/Al2O3 ratio of 450 displayed ultrahigh CO2 permeances of (1.0–1.3) × 10−5 mol (m2 s Pa)−1 (∼30000–37000 GPU) and CO2/CH4 selectivities of (56–126) at 298 K and 0.2 MPa pressure drop. The typical membrane also displayed CO2 permeance of 7.6 × 10−6 mol (m2 s Pa)−1 (∼23000 GPU) and CO2/N2 selectivity of 35 for an equimolar CO2/N2 mixture. The separation performance of these thin SAPO-34 membranes was far beyond that of most reported membranes. Such CO2 permeances of the membranes are 200–350 times higher than that of commercial polyimide membranes. The membranes shows great potentials for CO2 capture from natural and flue gases.

源语言英语
文章编号120420
期刊Journal of Membrane Science
650
DOI
出版状态已出版 - 15 5月 2022

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