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Accelerated crystallization of zeolites via hydroxyl free radicals

AuthorsFeng, Guodong; Boronat, Mercedes; Corma, Avelino; Yu, Jihong
Issue Date2016
PublisherAmerican Association for the Advancement of Science
CitationScience 351(6278): 1188-1191 (2016)
AbstractIn the hydrothermal crystallization of zeolites from basic media, hydroxide ions (OH–) catalyze the depolymerization of the aluminosilicate gel by breaking the Si,Al–O–Si,Al bonds and catalyze the polymerization of the aluminosilicate anions around the hydrated cation species by remaking the Si,Al–O–Si,Al bonds. We report that hydroxyl free radicals (•OH) are involved in the zeolite crystallization under hydrothermal conditions. The crystallization processes of zeolites—such as Na–A, Na–X, NaZ–21, and silicalite-1—can be accelerated with hydroxyl free radicals generated by ultraviolet irradiation or Fenton’s reagent.
DescriptionFeng, Guodong et al.
Publisher version (URL)https://doi.org/10.1126/science.aaf1559
Identifiersissn: 0036-8075
e-issn: 1095-9203
Appears in Collections:(ITQ) Artículos
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