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研究了 2 98和 4 73K时单组分正丁烷和异丁烷及正 /异丁烷混合气 (异丁烷摩尔分数为 75 7% ,正丁烷摩尔分数为 2 4 3% )在管状Silicalite_1分子筛膜上的渗透特性 .研究发现 ,在 2 98,4 73K及 0 0 6MPa的压差下 ,正丁烷和异丁烷的理想分离系数分别为 16 3和 7 4 .正 /异丁烷混合气在 2 98,4 73K时的分离系数在 2 0～ 2 5之间 .在 2 98K时 ,正丁烷的透量因异丁烷的存在而比相同条件下的单组分的透量低 ;而异丁烷的透量与相同条件下的单组分的透量相比基本保持不变 .在 4 73K时 ,正丁烷和异丁烷的透量与相同条件下的单组分的透量相比均有下降 ,但正丁烷下降更为显著 .
The effects of single-component n-butane, isobutane and n-butane mixed gas (75 7% isobutane and 24.3% n-butane mole fraction) in tubular Silicalite_1 zeolite membranes.The results showed that the ideal separation factors of n-butane and isobutane were 16 3 and 7 4 at pressures of 28 98 and 433 K and pressures of 0 0 6 MPa, The separation coefficient of mixed gas at 2 98 and 4 73 K is between 20 and 25. At 288 K, the amount of n-butane is higher due to the presence of isobutane than the same amount of single component Low; while the isobutane and the same amount of single-component under the same amount of transmission remained unchanged at 4 73K, n-butane and isobutane and the same amount of one-component under the same conditions The amount of n-butane decreased more significantly.