催化学报

催化学报 ›› 2008, Vol. 29 ›› Issue (9): 928-934.

• 研究论文 • 上一篇    下一篇

以MCM-22为原料合成高水热稳定性的介孔材料

刘子玉1,朱子彬1,王仁远2,朱学栋1   

  1. 1 华东理工大学工业大型反应器教育部工程研究中心, 上海 200237; 2 上海宝钢化工有限公司技术中心, 上海 200942
  • 收稿日期:2008-09-25 出版日期:2008-09-25 发布日期:2012-07-19

Synthesis of Mesoporous Materials with High Hydrothermal Stability from MCM-22

LIU Ziyu1, ZHU Zibin1, WANG Renyuan2, ZHU Xuedong1*   

  1. 1 Engineering Research Center of Large Scale Reactor Engineering and Technology, East China University of Science and Technology, Shanghai 200237, China; 2R&D, Baochem Co. Ltd., Shanghai 200942, China
  • Received:2008-09-25 Online:2008-09-25 Published:2012-07-19

PDF

981

被引次数

23

摘要： 以合成的微孔分子筛MCM-22为原料,将其与表面活性剂及氢氧化钠一起回流溶解,再调节溶液的pH值至7～9, 使MCM-22转化为高水热稳定性的介孔材料. 所得介孔材料具有蠕虫状的均匀孔道,骨架中不含有MCM-22的微观结构单元. 该介孔材料至少含有18%的表面活性剂,经823 K焙烧脱除表面活性剂后,其孔径为2.2 nm, 比表面积为1038m2/g, 孔容为0.97 cm3/g. 焙烧后的介孔材料具有非常高的水热稳定性,经沸水回流100 h后其比表面积为896 m2/g, 孔容为0.90 cm3/g, 孔径为2.1 nm, 即使经过300 h的回流,该材料仍能保持698 m2/g的比表面积和0.90 cm3/g的孔容. 固体29SiMAS NMR结果表明,该介孔材料的高水热稳定性与其高表面缩合度有关.

关键词: MCM-22, 介孔材料, 水热稳定性, 后处理

Abstract: Microporous MCM-22 was transferred to mesoporous materials by refluxing with surfactant in the presence of NaOH followed by adjusting the pH to 7 -9. The obtained materials exhibited remarkable hydrothermal stabili ty. After being refluxed in boiling water for 300 h, Ecust-7 still remained a h igh specific surface area of 698 m2/g and a pore volume of 0.90 cm3/g.

Key words: MCM-22, mesoporous material, hydrothermal stability, post-synthetic treatment