Pore structure characterization of kaolin, metakaolin, and their acid-treated products using small-angle X-ray scattering
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Data
1994-02-01
Autores
Vollet, Dimas R. [UNESP]
Macedo, JoséCarlos D.
Mascarenhas, Yvonne P.
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Resumo
Pore structure of dealuminated kaolin and metakaolin was studied by small-angle X-ray scattering (SAXS). Both parent kaolin and metakaolin have about 10% of the total pore volume provided by globular pores with 105 Å mean pore size. Their surface area is about 14 m2/g. Acid dealumination of kaolin causes an increase of its globular pore volume without an appreciable change in the mean pore size, its surface area increasing up to about 90 m2/g. Acid dealumination of metakaolin enhances the globular pore volume, although there is generation of slit-shaped pores with a narrow thickness distribution whose mean value is 14 Å. This interlayer spacing causes an increase in surface area of about 190 m2/g by SAXS. © 1994.
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dealumination, kaolin, pore structure, small angle X-ray scattering, Acids, Characterization, Clay products, Porosity, Surface properties, X ray analysis, Acid dealumination, Acid treatment, Globular pore volume, Metakaolin, Small angle X ray scattering (SAXS), Kaolin
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Applied Clay Science, v. 8, n. 6, p. 397-404, 1994.