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利用原位水热合成法在二氧化硅陶瓷管上制备出具有较高重复性的silicalite-1分子筛膜,8个分子筛膜平均分离系数的相对标准偏差(R.S.D.)仅为7.5%.与没有进行填充所制备的分子筛膜相比,通过利用有效的“溶液填充”方法,膜的平均透量提高了49%,80℃分离乙醇/水混合物时,膜的最高透量达到了1.49kg/(m2·h).渗透汽化实验结果表明,silicalite-1分子筛膜60℃分离甲醇/水,乙醇/水,2-丙醇/水和1-丙醇/水混合物时,膜的透量分别为2.63,0.87,0.24和0.20kg/(m2·h),对应的分离系数分别为22,69,81和159.
The silicalite-1 molecular sieve membrane with high repeatability was prepared by in-situ hydrothermal synthesis on silica ceramic tube with the relative standard deviation (RSD) of only 7.5% of the average separation coefficient of 8 molecular sieve membranes. The average membrane penetration increased by 49% compared to the prepared zeolite membranes by using an effective “solution fill” method and the maximum membrane permeation reached 1.49 kg / min at 80 ° C when the ethanol / water mixture was separated. (m2 · h) .The results of pervaporation showed that the membrane permeabilities of the membrane of silicalite-1 zeolite membrane at 60 ℃ were methanol / water, ethanol / water, 2-propanol / water and 1-propanol / 2.63, 0.87, 0.24 and 0.20 kg / (m2 · h), respectively, with corresponding separation factors of 22, 69, 81 and 159, respectively.