THE USE OF THE COMBINATION OF FTIR, PYRIDINE ADSORPTION, 27Al AND 29Si MAS NMR TO DETERMINE THE BRÖNSTED AND LEWIS ACIDIC SITES. Jurnal Teknologi, [S. l.], v. 78, n. 6, 2016. DOI: 10.11113/jt.v78.8821. Disponível em: https://journals.utm.my/jurnalteknologi/article/view/8821.. Acesso em: 18 jul. 2024.