Steam-Assisted Synthesis of Hierarchical Fe-Silicalite-1: A Novel Heterogeneous Fenton Catalyst

• Published in: Petroleum chemistry Vol. 63; no. 2; pp. 158 - 166
• Main Authors: Bragina, A. A., Babina, K. A., Kuleshov, D. V., Lysikov, A. I., Parkhomchuk, E. V.
• Format: Journal Article
• Language: English
• Published: Moscow Pleiades Publishing 01.02.2023; Springer; Springer Nature B.V
• Subjects: Catalysts; Chemical synthesis; Chemistry; Chemistry and Materials Science; Crystallization; Ethanol; Hydrogen peroxide; Industrial Chemistry/Chemical Engineering; Latex; Microcrystals; Nanocrystals; Oxidation; Polystyrene resins; Pretreatment; Silicalite; Fe-silicalite-1; steam-assisted crystallization; heterogeneous Fenton system; water decontamination; zeolites; hierarchical zeolites
• ISSN: 0965-5441; 1555-6239
• DOI: 10.1134/S0965544123020202

Three types of heterogeneous Fenton catalysts based on Fe-silicalite-1 were synthesized: (1) microcrystals with an average size of 5 μm (m-FeZ); (2) a hierarchical porous sample consisting of 100–200 nm nanocrystals prepared using a dry polystyrene latex template (h-FeZ); and (3) three hierarchical porous samples consisting of 30–50 nm nanocrystals prepared by steam-assisted crystallization (n-FeZ-1,2,3). The synthesis procedure for n-FeZ-1 and n-FeZ-2 included gel pretreatment at 90°C for 72 h. This pretreatment specifically involved introducing Fe into the reaction mixture after (for n-FeZ-1) and before (for n-FeZ-2) the gel aging. The samples were tested as heterogeneous Fenton catalysts in H 2 O 2 -mediated total oxidation of ethanol. The performance of the heterogeneous catalysts was compared with a conventional homogeneous Fenton catalyst.