高等学校化学学报

高等学校化学学报 ›› 1987, Vol. 8 ›› Issue (12): 1059.

• 论文 • 上一篇    下一篇

杂原子(Si)等比取代骨架P和Al时AlPO4-5型分子筛结构的研究

孟宪平1, 庞文琴1, 李旺荣2, 刘振义2, 张婉静2   

  1. 1. 吉林大学合成与催化研究所;
    2. 北京大学物理化学研究所
  • 收稿日期:1986-07-06 出版日期:1987-12-24 发布日期:1987-12-24

Study on the Structure of AlPO4-5 Type Molecular Sieve in the Framework P and Al Substituted Equal-Proportionally by Hetero-Atom(Si)

Meng Xianping1, Pang Wenqin1, Li Wangrong2, Liu Zhenyi2, Zhang Wanjing2   

  1. 1. Institute of Synthetic and Catalytic Chemistry, Jilin University, Ghangchun;
    2. Institute of Physical Chemistry, Peking University, Beijing
  • Received:1986-07-06 Online:1987-12-24 Published:1987-12-24

PDF (PC)

摘要： 应用多晶X-射线衍射法研究了SAPO-5型分子筛结构,并经Rictveld法修正。结构测定得出,平均每个晶胞3。13个Sj原子等比取代P和Al进入骨架,但仍保持APO-5型分子筛的对称性和几何构型。Sj在骨架中与P、Al基本上成无序排列,从而使分子筛骨架不带电荷,在[001]方向也失去极性。因此若Si原子等比取代骨架中的P和Al,对调节APO-5分子筛的催化性能不会有显著作用。

Abstract: The structure of Si-APO-5 type molecular sieve synthesized by us was investi-gated by X-ray diffraction for polycrystalline and the parameters were refined by Rietveld method. We discovered, although in average each unit cell 3.13 silicon atoms substituted equal-proportionally P, Al and entered framework of molecular sieve, SAPO-5 sample (10900) still keepcd the same symmetry and geometric configuration as APO-5. In addition to, the arrange of Si, P, Al in the framework were disorder on the whole, therefore, framework of molecular sieve lost polarity along[001] and cann't carry charge. So as Si atom substituted Pand Al atoms in framework equnl-proportionally, catalytic functions of APO-5 type molecular sieve cann't be outstanding adjusted.

TrendMD: