高等学校化学学报 ›› 1990, Vol. 11 ›› Issue (12): 1391.

• 研究论文 • 上一篇    下一篇

SAPO-11分子筛的酸性及催化性能

严爱珍, 刘杨, 于振臣, 须沁华   

  1. 南京大学化学系, 210008
  • 收稿日期:1989-03-13 出版日期:1990-12-24 发布日期:1990-12-24
  • 通讯作者: 严爱珍
  • 基金资助:

    国家自然科学基金

Acidic and Catalytic Properties of SAPO-11 Molecular Sieve

Yan Ai-zhen, Liu Yang, Yu Zhen-chen, Xu Qin-hua   

  1. Department of Chemistry, Nanjing University, Nanjing, 210008
  • Received:1989-03-13 Online:1990-12-24 Published:1990-12-24

摘要: 用IR及TPD法研究了SAPO-11分子筛的表面酸性质,并以正庚烷裂解和乙醇脱水为探针研究其催化性能。结果表明,SAPO-11分子筛上既有L酸中心,又有B酸中心,表面上存在4个羟基峰。NH3-TPD测定了SAPO-11的酸强度和酸中心数,并用矩形法求得脱附活化能,SAPO-11系属中等酸强度的分子筛。

关键词: SAPO-11分子筛, 酸性, 正庚烷裂解, 乙醇脱水

Abstract: The acidic properties of SAPO-11 molecular sieve were studied by IRand TPD methods. The catalytic properties of n-heptane cracking and ethanol dehydration on SAPO-11, HZSM-5 and SAPO-5 were performed. The results indicated that both Bronsted and Lewis acid sites are present in the sample of SAPO-11. From the spectra of NH3-TPD on SAPO-11 the amount and strength of acid sites were measured and NH3 desorption activation energy was calculated, showing that it has medium acidic strength.

Key words: Molecular sieve SAPO-11, Acidic properties, Catalysis of heptane cracking and ethanol dehydration

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