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Journal of Inorganic Materials

Journal of Inorganic Materials >

2009 , Vol. 24 >Issue 3: 581 - 585

DOI: https://doi.org/10.3724/sp.j.1077.2009.00581

Research Paper

Synthesis and Characterization of Highsilica SAPO-5 from Metakolin

  • ZHOU Xin-Tao ,
  • LIU Qi-Feng ,
  • SU Da-Gen，LAI Lan-Mei
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  • 1. Department of Chemistry, Shangqiu Normal University, Shangqiu 476000，China; 2. College of Material Science and Engineering, South China University of Technology, Guangzhou 510640, China

Received date: 2008-07-21

  Revised date: 2008-09-04

  Online published: 2009-05-20

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Abstract

Highsilica silicoaluminophosphate (SAPO-5) molecular sieves were hydrothermally synthesized using metakaoline with a certain activity as the silicon and aluminum sources, phosphoric acid as the phosphorus source and triethanolamine combined with cetyltrimethylammonium bromide (CTMABr) as the template agents. The sample was characterized by means of X-ray diffraction spectroscope (XRD), Infrared spectrum (IR), scanning electron microscope (SEM) and 29Si, 27Al MAS-NMR and X-ray photoelectron spectroscope (XPS), temperatureprogrammed desorption of adsorbed NH3. The results show that the crystallization of the SAPO-5 can be promoted by the addition of CTMABr. The synthesized SAPO-5 reveals pillarlike morphology with dimension of 20μm×5μm×5μm. The local environment of Si and Al changs greatly after reaction and many fourcoordinated structures such as Al(OP)4 and Si(AlO)4 are produced with the Si/Al ratio of 0.56. The acidity amount of the product is 0.578mmol/g and the ratio of the strong acid sites to the weak acid sites is 0.684.

Key words： kaolin; metakaolin; hydrothermal; SAPO-5

Cite this article

ZHOU Xin-Tao , LIU Qi-Feng , SU Da-Gen，LAI Lan-Mei . Synthesis and Characterization of Highsilica SAPO-5 from Metakolin[J]. Journal of Inorganic Materials, 2009 , 24(3) : 581 -585 . DOI: 10.3724/sp.j.1077.2009.00581

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