. NURHAYATI. Characterization of Surface Acidity of Maredan Clay Catalyst Activated with Sulfuric Acid Using Boehm Titration and Pyridine Adsorption Method . New Trends in Physical Science Research Vol. 6, [S. l.], p. 54–62, 2022. DOI: 10.9734/bpi/ntpsr/v6/2173A. Disponível em: https://stm.bookpi.org/NTPSR-V6/article/view/7212. Acesso em: 11 jun. 2026.