摘要
采用二次水热合成法,在大孔的α-Al2O3载体上合成了连续致密的镁碱沸石膜.采用XRD,SEM以及单组分气体渗透试验对所合成的膜进行表征,并研究了不同晶化起始物料对合成镁碱沸石膜的影响.结果表明,当使用十八水硫酸铝作为固定的铝源,研究不同硅源的影响时,使用正硅酸乙酯作为硅源,很难在载体表面形成连续的镁碱沸石膜,而使用水玻璃和硅溶胶作为硅源合成出的膜则具有较好的连续性和致密性;当改变铝源时,单质铝和氯化铝无法合成镁碱沸石膜或无法合成纯的镁碱沸石膜,而使用硫酸铝、铝酸钠和异丙醇铝则可以合成纯的镁碱沸石膜.并且,合成的膜的致密性存在差异,按所合成的镁碱沸石膜的致密性由好到坏的顺序所采用的铝源分别为:十八水硫酸铝,异丙醇铝,铝酸钠.
The integrally compact ferrierite membranes were synthesized on the macroporous a - Al2O3 supports by secondary hydrothermal synthesis. The effects of different reactants on synthesis of ferrierite membrane were investigated. The membranes were characterized by X - ray diffraction, scanning electron microscopy and single - gas permeation test. As a result, it is found that a integrally compact ferrierite membrane was synthesized on the support using water glass or silica sol as the silica source whereas TEOS couldn＇t. For the alumina sources, metallic aluminum and aluminum chloride couldn＇t be employed to synthesize ferrierite membrane. However, pure ferrierite membrane could be synthesized by aluminum sulfate octadecahydrate, sodium aluminate or aluminum isopropylate. The compactness order of the ferrierite membranes synthesized using them as aluminum source is as follows：aluminum sulfate octadecahydrate, aluminum isopropylate and sodium aluminate.
出处
《膜科学与技术》
CAS
CSCD
北大核心
2009年第4期29-33,共5页
Membrane Science and Technology
关键词
镁碱沸石膜
硅源
铝源
渗透分离性能
ferrierite membrane
silica source
alumina source
permeance and separation performance
