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Determination of SBA-15 acidity through n-butyl amine TPD: a theoretical and experimental study
- Luz, Geraldo E., Jr., Lima, Francisco C. A., Neto, Cicero O. Costa, Paz, Gizeuda L., Silva, Edjane F. B., Barbosa, Marcela N.
- Journal of materials science 2013 v.48 no.20 pp. 6885-6890
- Fourier transform infrared spectroscopy, acidity, active sites, catalytic activity
- 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.