Abstract CO2-selective AlPO-18 membranes were prepared hydrothermally on macroporous supports with a low-cost template N, N-diisopropylethylamine (DIPEA). The effects of synthesis parameters (such as gel dilution, synthesis temperature, synthesis time and aging time) on the structure, morphology and single gas permeation properties of CO2 and CH4 through AlPO-18 membranes were investigated in detail. The synthesis conditions had little effect on the membrane morphology but strongly affected the CO2/CH4 gas permeation properties of as-synthesized AlPO-18 membranes. The best membrane was obtained at a synthesis temperature of 433 K for 15 h after aging the precursor gel (1Al2O3: 1P2O5: 4DIPEA: 120H2O: 4IPA) for 24 h. The CO2 single gas permeance of this membrane was 1.1 × 10−6 mol/(m2 s Pa), with an ideal CO2/CH4 selectivity of 56 at 303 K and a 0.1 MPa pressure drop. The mixed gas CO2 permeance of same membrane with an equimolar CO2/CH4 mixture was 1.1 × 10−6 mol/(m2 s Pa) with a CO2/CH4 selectivity of 75 at 303 K and a 0.2 MPa pressure drop.

中文翻译：

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合成参数对单DIPEA制备用于CO2/CH4分离的AlPO-18膜的影响

摘要 采用低成本模板 N, N-二异丙基乙胺 (DIPEA) 在大孔载体上水热制备 CO2 选择性 AlPO-18 膜。详细研究了合成参数(如凝胶稀释度、合成温度、合成时间和老化时间)对CO2和CH4通过AlPO-18膜的结构、形貌和单一气体渗透性能的影响。合成条件对膜形态几乎没有影响，但对合成的 AlPO-18 膜的 CO2/CH4 气体渗透性能有很大影响。最好的膜是在前体凝胶 (1Al2O3: 1P2O5: 4DIPEA: 120H2O: 4IPA) 老化 24 小时后，在 433 K 合成温度下 15 小时获得的。该膜的 CO2 单一气体渗透率为 1.1 × 10−6 mol/(m2 s Pa)，理想的 CO2/CH4 选择性在 303 K 时为 56，0. 1 MPa 压降。具有等摩尔 CO2/CH4 混合物的相同膜的混合气体 CO2 渗透率为 1.1 × 10−6 mol/(m2 s Pa)，在 303 K 和 0.2 MPa 压降下 CO2/CH4 选择性为 75。