摘要
采用水热法在铁铬铝合金片载体上原位合成了MCM-22沸石膜,并采用X射线衍射和扫描电子显微镜对沸石膜进行了表征,探讨了成膜的影响因素.结果表明,载体预处理条件对合成沸石膜的品质有较大的影响.载体仅经碱处理后合成的沸石膜稀疏而不连续;载体先经碱处理再经酸处理后可得到连续致密的沸石膜,且晶片取向均一;载体预先涂覆Al2O3胶过渡层后制得的MCM-22沸石膜经超声波清洗后不会脱落,表明沸石膜与载体间的结合力增强.此外,增大晶化母液量有利于沸石膜的生长.
The MCM-22 zeolite membrane was synthesized on an iron-chromium-aluminum alloy foil by the hydrothermal method and characterized by X-ray diffraction and scanning electron microscopy. The results showed that the surface properties of the support had an important effect on the formation of the MCM-22 zeolite membrane. The MCM-22 zeolite membrane grew much better on the alloy foil treated with acid. The precoating of Al2O3 colloid on the alloy foil could enhance the interaction between the MCM-22 zeolite membrane and the support. The amount of the mother liquid was also an important factor affecting the formation of the MCM-22 zeolite membrane, and a high quality MCM-22 zeolite membrane could be obatined with more mother liquid. If the mother liquid was not enough, there was no MCM-22 zeolite membrane formed.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2006年第6期506-510,共5页
基金
教育部新世纪优秀人才支持计划基金(NCET-04-0117)
中国石油化工股份有限公司基金(X503011)资助项目
关键词
铁铬铝合金片
水热法
MCM-22沸石膜
合成
iron-chromium-aluminum alloy foil
hydrothermal method
MCM-22 zeolite membrane
synthesis
