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Adsorption

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Nitrogen adsorption at ca. 77.4 K on partially hydrated and anhydrous α-Al2O3

  • Maxim S. Mel’gunovEmail author
  • Artem B. Ayupov
  • Elena A. Krapivina
  • Elena A. Mel’gunova
Article
  • 21 Downloads

Abstract

N2 adsorption isotherms at ca. 77 K on macroporous α-Al2O3 have been measured and analyzed in the frameworks of the classic thermodynamic approach, with independent experimental data obtained by means of SEM-EDX, XRD, TGA, helium pycnometry, and mercury porosimetry taken into account. It is shown, that presence of adsorbed water considerably influences N2 adsorption, which gradually increases with temperature of the degas treatment. Simultaneously, the shape of the isotherms has a trend to change from Type II to Type VI, that assumes changing of adsorption mechanism from progressive increasing of the adsorbed layer thickness towards layer-by-layer adsorption. Corrected and smoothed isotherms are presented in the tabular form as reference for subsequent more comprehensive analysis using molecular statistical approaches.

Keywords

Reference adsorption N2 Alumina Corundum 

Notes

Acknowledgements

This work was supported by Ministry of Science and Higher Education of the Russian Federation (Project АААА-А17-117041710079-8).

Supplementary material

10450_2019_55_MOESM1_ESM.xlsx (67 kb)
Supplementary material 1. (XLSX 67 KB)

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Copyright information

© Springer Science+Business Media, LLC, part of Springer Nature 2019

Authors and Affiliations

  • Maxim S. Mel’gunov
    • 1
    • 2
    Email author
  • Artem B. Ayupov
    • 1
    • 2
  • Elena A. Krapivina
    • 1
    • 2
  • Elena A. Mel’gunova
    • 1
  1. 1.Boreskov Institute of Catalysis SB RASNovosibirskRussian Federation
  2. 2.Novosibirsk State UniversityNovosibirskRussian Federation

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