Fourier Transformation Infrared Spectroscopic Studies of Acidity of NaH-13 X Zeolites. Al-Nahrain Journal for Engineering Sciences, [S. l.], v. 21, n. 3, p. 428–435, 2018. DOI: 10.29194/NJES.21030428. Disponível em: https://nahje.com/nahje/article/view/465. Acesso em: 28 apr. 2026.