Dense and thin pure silica CHA-type zeolite (Si-CHA) membranes have been synthesized on porous α-alumina supports and investigated for CO₂ permeation and CO₂/CH₄ separation performance under dry and humidified conditions. Si-CHA membranes with ultra-high permeance were greatly affected by performance suppression due to concentration polarization under high pressure and low feed-rate conditions. Under high feed-rate conditions at 298 K and a feed pressure of 0.1 MPaG, the CO₂/CH₄ selectivity was 130 with a CO₂ permeance of 4.0 × 10^–6 mol/(m² s Pa) for an equimolar CO₂/CH₄ dry gas mixture. The presence of water vapor significantly reduced CO₂ permeance, but the performance improved as feed pressure increased. The CO₂/CH₄ selectivities at high pressure with and without water vapor were essentially the same.

已经在多孔α-氧化铝载体上合成了致密且纯净的二氧化硅CHA型沸石（Si-CHA）膜，并研究了其在干燥和加湿条件下的CO ₂渗透性和CO ₂ / CH ₄分离性能。由于在高压和低进料速率条件下的浓度极化，超高渗透性的Si-CHA膜受到性能抑制的极大影响。在298 K和0.1 MPaG的进料压力下的高进料速率条件下， 对于等摩尔CO ₂，CO ₂ / CH ₄选择性为130，CO ₂透过率为4.0×10 ^–6  mol /（m ² s Pa）。/通道₄干混合气体。水蒸气的存在显着降低了CO _2的渗透率，但是随着进料压力的增加，性能得到了改善。在有和没有水蒸气的情况下，高压下的CO ₂ / CH ₄选择性基本相同。