Adjustment of textural and acidic properties of aluminum oxide by modifying the product of thermo-chemical activation of gibbsite with acids in hydrothermal conditions

• Published in: Microporous and mesoporous materials 2024-04, Vol.369, p.113025, Article 113025
• Main Authors: Dmitriev, Konstantin Igorevich, Bobkova, Tatyana Viktorovna, Sorokina, Tatyana Pavlovna, Koveza, Vladislav Anatolyevich, Yurtaeva, Arina Sergeevna, Doronin, Vladimir Pavlovich, Potapenko, Oleg Valeryevich
• Format: Article
• Language: English
• Subjects: Aluminum oxide; Catalytic cracking; n-hexadecane; Product of thermochemical activation of gibbsite
• ISSN: 1387-1811; 1873-3093
• DOI: 10.1016/j.micromeso.2024.113025

The paper considers the effect of the modifier (nitric and sulfuric acids) on the physicochemical properties of aluminum oxide as a component (carrier) of cracking catalysts. The modifier was introduced during pre-treatment of the thermochemical activation product of gibbsite (TCA product). The article describes the influence of the amount of acids introduced during the TCA product pre-treatment stages (hydration and hydrothermal treatment (HTT)) on the acidic and textural properties of the resulting product. The activity of the obtained aluminum oxide samples during catalytic cracking of n-hexadecane, a model feedstock, was evaluated. All obtained samples were compared with aluminum oxide produced by the sulfate redeposition method. The cracking of hydrotreated vacuum gasoil on catalytic systems “aluminum oxide – zeolite Y″ was investigated. [Display omitted] -Aluminum oxide is an important component of FCC catalyst.-Hydration and hydrothermal treatment are required to prepare aluminum hydroxide.-Modification SO42− of aluminum oxide increases the acidity and catalyst FCC activity.