T型及KA分子筛膜的制备、修复及其天然气脱水蒸气性能研究

Preparation and Repair of T-type and KA Zeolite Membrane and Their Dehydration Performance for Natural Gas

本文以氧化铝陶瓷为基底,合成了T型和KA两种分子筛膜,并将其应用于天然气脱水蒸气实验。研究表明,T型及KA分子筛膜对模型天然气脱水蒸气的H2O/CH4选择性分别为2.80和3.16。采用表面涂层法对分子筛膜中的缺陷进行修复,从而有效提高了其模型天然气脱水蒸气性能,修复后的T型及KA分子筛膜的H2O/CH4选择性分别达到了10.52和17.71,水蒸气的渗透系数分别为104397和28200 Barrer,甲烷损失率分别仅为2%和1%,修复后的两种分子筛膜皆具有良好的稳定性。

T-type and KA zeolite membranes were synthesized on the alumina ceramics substrate and applied to model natural gas(mathane gas with 3.5%water vapor)dehydration.The model natural gas dehydration performance showed that the H2O/CH4 selectivities for model natural gas removal were 2.80 and 3.16 respectively for the T-type and KA zeolite membranes.Furthermore,the surface coating method was used to repair the defects in the zeolite membrane,thereby effectively improving its performance on the dehydration of model natural gas the H2O/CH4 selectivities up to 10.52 and 17.71,with the water vapor permeability coefficients of 104397 Barrer and 28200 Barrer and the methane loss rates of only 2%and 1%,respectively.The two repaired zeolite membranes had good stability.