オルガノシリカ膜の開発と膜型反応器　への応用

1.对于有机硅膜，分离的潜在应用之一是在高温下从C3 H6纯化H2。但是有机硅膜的热稳定性仍然不清楚，因为膜通常在低于300 °C的温度下制备和使用，这是由于有机连接单元在高温下分解。开发在高温下具有热/氧化稳定性和高气体选择性的有机二氧化硅材料衍生的膜仍然是一个挑战。为此，我们开发了在N2下在高温下制备的有机二氧化硅膜，并且膜显示出优异的选择性，具有高水平的H2渗透性和渗透性能，该渗透性能可以通过在550 ° C下在空气中处理来定制。采用溶胶-凝胶法制备了用于分离O2/SO 3的无机微孔膜。单一气体渗透测量表明，具有大孔径和高Si/Zr摩尔比的二氧化硅-氧化锆膜具有良好的抗SO 3，这是证实了由气体渗透的变化。BET、EDS和pH等表征结果表明，SiO2、α-Al 2 O3和低Zr含量的SiZr粉末在550 °C下对SO 3具有良好的化学稳定性。在SO 3/O2二元气体分离中，由BTESE分离层、SiZr（Si/Zr = 7/3）中间层和α-Al 2 O3支撑层组成的膜的O2渗透率为2.5 × 10-8 mol m-2s-1 Pa-1，O2/SO 3选择性为10.

1. For organosilica membranes, one of the potential applications of separation is H2 purification at high temperatures from C3H6. But the thermal stability of organosilica membranes has remained unclear, because membranes are usually prepared and used at temperatures lower than 300 °C due to decomposition of the organic linking units at high temperatures. The development of organosilica materials-derived membranes with thermal/oxidation stability at high temperatures and high gas selectivity remains a challenge. To this end, we developed organosilica membranes prepared at high temperatures under N2 and membranes showed excellent selectivity with high levels of H2 permeance and a permeation performance that could be tailored by treatment under air at 550 °C.2. Microporous inorganic membranes prepared via a sol-gel method were proposed for O2/SO3 separation. Single-gas permeation measurements revealed that silica-zirconia membranes with a large pore size and a high Si/Zr molar ratio had good resistance to SO3, which was confirmed by the change of gas permeance. Characterizations including BET, EDS, and pH indicated the SiO2, α-Al2O3 and lower Zr-content SiZr powders had good chemical stability against SO3 even at 550 °C. In the binary-component gas separation of SO3/O2, the membrane that consisted of BTESE separation layer, SiZr (Si/Zr = 7/3) intermediate layer and α-Al2O3 support layer showed an O2 permeance of 2.5*10－8 mol m-2 s-1 Pa-1 and exhibited an O2/SO3 selectivity of 10.