Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (4): 83-86.doi: 10.3969/j.issn.1000-565X.2010.04.016

• Materials Science & Technology • Previous Articles     Next Articles

Synthesis and Catalytic Performance of Silicoaluminophosphate Molecular Sieves from Metakaolin

Zhong Ming-feng  Zhang Zhi-jie  Zhou Xin-tao   

  1. School of Materials Science and Engineering,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2009-05-05 Revised:2009-09-09 Online:2010-04-25 Published:2010-04-25
  • Contact: 钟明峰（1976-），男，博士，讲师，主要从事生态环境材料研究． E-mail:mfzhong@seut．edu，cn
  • About author:钟明峰（1976-），男，博士，讲师，主要从事生态环境材料研究．
  • Supported by:

    广东省科技计划项目（2008A030202006）

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Abstract:

Silicoaluminophosphate（SAPO-5） molecular sieves were synthesized respectively by the piecewise and one-step crystalline methods,with metakaolin as the silicon and aluminum sources,phosphoric acid as the phosphorus source and with triethylamine combined with hexadecyl trimethyl ammonium bromide as the template agent.Then,the prepared molecular sieves were characterized by means of XRD,SEM,XPS and NH3-TPD analysis.The results show that the product prepared by the piecewise crystalline method is of uniform pillar-like morphology,large size（about 20μm×5μm×5μm）,proper P∶Al∶Si molar ratio（1∶1.19∶0.67）,high Si content and higher total acid content（578.0μmol/g）,and that its initial activity（24.8%） is much higher than that of the product prepared by the one-step method（14.1%）.

Key words: metakaolin, crystallization, silicoaluminophosphate molecular sieve, catalytic performance