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Determination of SBA-15 acidity through n-butyl amine TPD: a theoretical and experimental study

Abstract

In this study, the interaction ways between n-butyl amine and SBA-15 molecular sieve were evaluated when the TPD technique is carried out to determine the total acidity of that solid. Experimental results (FTIR, TG/DTG, total acid, and catalytic activity) and theoretical calculations demonstrated that the n-butyl amine, used as probe molecule to total acidity determined by TPD, can act as acid or base depending on the nature and force of the active sites on SBA-15.

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Acknowledgments

The authors would like to thank the FAPEPI, FINEP, CENAPAD and LCP-UFRN by support in the development of this work.

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Correspondence to Geraldo E. Luz Jr..

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Luz, G.E., Lima, F.C.A., Neto, C.O.C. et al. Determination of SBA-15 acidity through n-butyl amine TPD: a theoretical and experimental study. J Mater Sci 48, 6885–6890 (2013). https://doi.org/10.1007/s10853-013-7492-5

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  • DOI: https://doi.org/10.1007/s10853-013-7492-5

Keywords

  • Acid Site
  • Thermal Desorption
  • Total Acidity
  • Probe Molecule
  • Weak Acid Site