煤系高岭土微波合成NaA分子筛膜及其性能与表征 |
作者:胡秋玮 周志辉 向晓东 |
单位: 武汉科技大学冶金矿产资源高效利用与造块湖北省重点实验室,湖北 武汉 430081 |
关键词: 煤系高岭土;NaA分子膜;微波合成 |
DOI号: |
分类号: TD985 |
出版年,卷(期):页码: 2012,32(3):34-38 |
摘要: |
对高岭土微波合成NaA分子筛膜及其性能进行研究。从铝源和晶化时间等方面研究了对煤系高岭土微波合成NaA分子筛膜的影响,并比较了水热合成NaA分子筛膜和微波合成NaA分子筛膜性能。通过实验发现,以高岭土为原料制备的NaA分子筛膜经微波合成,其乙醇脱水渗透汽化中分离因数超过10000;NaA分子筛膜的微波合成在晶化时间分别为15min、20min和25min时,其渗透汽化通量由2.44kg•m-2•h-1降低为0.92kg•m-2•h-1,分离因数由2945增大为11846,其中NaA分子筛膜在晶化时间为20min时,其分离因数和渗透通量分别为10359和1.13 kg•m-2•h-1;同时在相同配方条件下,水热合成的NaA分子筛膜和微波加热合成的NaA分子筛膜相比,反应时间由4h降低为20min,而分离因数由5231增加到10360。 |
This paper focuses on the microwave synthesis of NaA zeolite membrane of kaolin and its performance. The effect of the aluminum source, crystallization time and other aspects on the microwave synthesis of NaA zeolite membrane of kaolin was studied, and the performance of hydrothermal synthesis of NaA membrane and the microwave synthesis of NaA membrane was compared. Experimental results showed that the kaolin as raw materials of the NaA membrane compounds by microwave synthesis, the separation factor of pervaporation dehydration of ethanol is more than 10,000; Crystallization time of kaolin as raw materials in the microwave synthesis of NaA membrane was 15 min, 20 min and 25 min, respectively; the pervaporation flux from the 2.44 kg•m-2•h-1 decreased to 0.92 kg•m-2•h-1, and the separation factor increased from 2945 to 11846. When the crystallization time was 20 min, the separation factor and permeation flux were 10359 and 1.13 kg•m-2•h-1, respectively; At the same time,under the same formulation conditions, the reaction time for hydrothermal synthesis of NaA membrane and microwave synthesis of NaA membrane reduced from 20 min to 4h, and the separation factor increased from 5231 to 10360. |
基金项目: |
作者简介: |
胡秋玮(1985- ),女,湖北武汉,武汉科技大学研究生,主要学习方向为无机膜制备和烟气脱硫脱硝的研究。 通讯作者:周志辉(1980- ),男,湖北武汉,武汉科技大学副教授,主要研究方向为无机膜的制备及应用。 |
参考文献: |
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