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The Effect of Modification on the Structural, Acidic, and Catalytic Properties of a Layered Aluminosilicate

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Abstract

The effect of modification on the structural, acidic, and catalytic properties of a natural layered aluminosilicate containing 90% montmorillonite was studied. With the use of low-temperature nitrogen adsorption and XRD analysis, it was found that the addition of hydroxo complexes of aluminum prevents the silicate layers of the layered aluminosilicate from closing upon heating and results both in the formation of stable micropores and in a considerable increase in the specific surface area. The acidic properties of the H, Na, and Al forms of the layered aluminosilicate were studied by IR spectroscopy of adsorbed CO molecules and by the indicator method. After modification with hydroxo complexes of aluminum, the number of Lewis acid sites and the accessibility of acidic OH groups to CO adsorption increased. The total number and strength of acid sites increased as the calcination temperature of the layered aluminosilicate was increased. A correlation between catalytic activity in the reaction of acetone dimerization and the number of acid sites in different forms of the layered aluminosilicate was obtained.

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Authors and Affiliations

  1. Baikal Institute of Nature Management, Siberian Division, Russian Academy of Sciences, Ulan-Ude, Buryat Republic, Russia

    S. Ts. Khankhasaeva, S. V. Badmaeva, E. Ts. Dashinamzhilova, E. B. Burgina, A. A. Budneva & E. A. Paukshtis

  2. Boreskov Institute of Catalysis, Siberian Division, Russian Academy of Sciences, Novosibirsk, 630090, Russia

    M. N. Timofeeva

Authors
  1. S. Ts. Khankhasaeva
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  2. S. V. Badmaeva
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  3. E. Ts. Dashinamzhilova
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  4. M. N. Timofeeva
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  5. E. B. Burgina
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  6. A. A. Budneva
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  7. E. A. Paukshtis
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Khankhasaeva, S.T., Badmaeva, S.V., Dashinamzhilova, E.T. et al. The Effect of Modification on the Structural, Acidic, and Catalytic Properties of a Layered Aluminosilicate. Kinetics and Catalysis 45, 708–713 (2004). https://doi.org/10.1023/B:KICA.0000044983.93503.c1

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  • DOI: https://doi.org/10.1023/B:KICA.0000044983.93503.c1

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