物理化学学报 >> 1995, Vol. 11 >> Issue (06): 547-552.doi: 10.3866/PKU.WHXB19950614

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复合固体超强酸催化剂SO2-4-WO3-ZrO2的结构研究

黄银燕,赵璧英,谢有畅   

  1. 北京大学物理化学研究所|北京 100871
  • 收稿日期:1994-04-04 修回日期:1994-07-23 发布日期:1995-06-15
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Structural Characterization of Solid Superacid Catalyst SO2-4-WO3-ZrO2

Huang Yin-Yan,Zhao Bi-Ying,Xie You-Chang   

  1. The Institute of Physical Chemistry,Peking University,Beijing 100871
  • Received:1994-04-04 Revised:1994-07-23 Published:1995-06-15
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关键词: 固体超强酸, SO2-4-WO3-ZrO2, 延迟晶化, ZrO2(t)稳定性

Abstract:

Solid superacid catalyst SO4(2-)-WO3-ZrO2 was characterized by means of XRD,DTA-TG, and surface area measurement techniques. The dependence of the surface area, SO42- content of the catalyst on calcination temperature was measured. It was found that there is a synergy to a certain degree between SO42- and WO3 with respect to the delay of ZrO2 crystallization, the stabilization of the tetragonal ZrO2 and the enlargement of the surface area of the catalyst. The addition of WO3 is beneficial to the stabilization of SO42- and remarkably increases the stability of SO42- at high temperature.

Key words: Solid superacid, SO2-4-WO3-ZrO2, Stability of tetragonal ZrO3