物理化学学报 >> 1990, Vol. 6 >> Issue (03): 290-297.doi: 10.3866/PKU.WHXB19900308

研究论文 上一篇    下一篇

MoO3与NaY、丝光沸石的表面相互作用研究

杨孔章; 王娅娟; 董玉林   

  1. 山东大学化学系
  • 收稿日期:1988-09-05 修回日期:1989-03-30 发布日期:1990-06-15
  • 通讯作者: 董玉林

The Study on the Surface Interaction Between MoO3 and NaY and Mordenite

Yang Kong-Zhang; Wang Ya-Juan; Dong Yu-Lin   

  1. Department of Chemistry, Shandong University, Jinan
  • Received:1988-09-05 Revised:1989-03-30 Published:1990-06-15
  • Contact: Dong Yu-Lin

摘要: 将晶相MoO_3分别同NaY、丝光沸石(NaM)充分研磨混合后, 在450 ℃下焙烧24小时, 制成氧化物负载型催化剂, 然后进行X射线衍射、激光Raman光谱、IR光谱和比表面测定. 实验结果表明MoO_3与分子筛载体之间存在强烈的表面相互作用, 致使晶相MoO_3经焙烧进入分子筛孔道, 以非晶相表面层的形态存在于NaY、NaM的骨架结构中; 并致使NaY晶格结构受到破坏, 结晶度和比表面降低, 而NaM的结构稳定性较高, 晶格结构基本上不受MoO_3分散的影响. X射线衍射相定量法求得MoO_3在1克NaY和NaM上的最大分散量分别是0.54克和0.11克。

Abstract: Crystalline MoO_3 and supports NaY, mordenite are mixed thoroughly, and the mixtures are calcined at 450 ℃ for 24 hours. A series of zeolites with dispersed MoO_3 are studied by XRD, Laser Raman, IR spectroscopy and surface area measurements. It is shown that duriag the calcination MoO_3 interacts strongly with NaY and mordenite. As a result of this sarface interaction MoO_3 migrates into the cavities of zeolites and disperses on it's surface as a non-crystalline layer. Moreover, the framework of NaY is destroyed by the dispersed MoO_3, but there are less effects on the mordenite's structure because of it's higher stability.
By XRD method, we estimate the maximum amount of dispersed MoO_3 is 0.54 and 0.11 gram per gram of NaY and mordenite respectively.