Modification of the Physicochemical Properties of High-Crystallinity Granular Y Zeolite by Steam Heating and Acid Treatment

• Published in: Petroleum chemistry Vol. 61; no. 3; pp. 284 - 291
• Main Authors: Khazipova, A. N., Travkina, O. S., Agliullin, M. R., Pavlova, I. N., Kutepov, B. I., Dyakonov, V. A.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01-03-2021; Springer
• Subjects: Analysis; Catalysis; Chemistry; Chemistry and Materials Science; Citric acid; Industrial Chemistry/Chemical Engineering; Zeolites; porous structure; dealumination; acidity; granular Y zeolite; crystalline order; decationation
• ISSN: 0965-5441; 1555-6239
• DOI: 10.1134/S0965544121030026

This study investigates, for the first time, the effects of steam heating of hierarchical porous-structured granular Y zeolite samples and of their subsequent treatment with aqueous nitric and citric acid solutions on the acid properties and porous structure characteristics of the samples. It was demonstrated that acid treatment of a sample not subjected to preliminary steam heating stabilization leads to its decationation, dealumination, and partial amorphization of its crystal lattice. In contrast, acid treatment of a steam-stabilized sample was found to mitigate the lattice destruction.