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A Lamellar MWW Zeolite With Silicon and Niobium Oxide Pillars: A Catalyst for the Oxidation of Volatile Organic Compounds.
Schwanke, Anderson Joel; Balzer, Rosana; Wittee Lopes, Christian; Motta Meira, Débora; Díaz, Urbano; Corma, Avelino; Pergher, Sibele.
Afiliação
  • Schwanke AJ; Universidade Federal do Rio Grande do Su, 91501-970, Porto Alegre, RS, Brasil.
  • Balzer R; Universidade Federal do Paraná-UFPR, 85950-000, Palotina, PR, Brasil.
  • Wittee Lopes C; Universidade Federal do Rio Grande do Su, 91501-970, Porto Alegre, RS, Brasil.
  • Motta Meira D; CLS@APS sector 20, Advanced Photon Source, Argonne National Laboratory, 9700 S. Cass Avenue, Argonne, IL 60439, USA.
  • Díaz U; Canadian Light Source Inc., 44 Innovation Boulevard, Saskatoon, Saskatchewan, S7N 2V3, Canada.
  • Corma A; Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior, de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022, Valencia, Spain.
  • Pergher S; Instituto de Tecnología Química, Universitat Politècnica de València-Consejo Superior, de Investigaciones Científicas, Avenida de los Naranjos s/n, 46022, Valencia, Spain.
Chemistry ; 2020 May 19.
Artigo em Inglês | MEDLINE | ID: mdl-32427389
ABSTRACT
In this work, an MWW-type zeolite with pillars containing silicon and niobium oxide was synthesized to obtain a hierarchical zeolite. The effect of niobium insertion in the pillaring process was determined by combining a controllable acidity and accessibility in the final material. All pillared materials had niobium occupying framework positions in pillars and extra-framework positions. The pillared material, Pil-Nb-4.5 with 4.5 wt % niobium, did not compromise the mesoporosity formed by pillaring, while the increase of niobium in the structure gradually decreased the mesoporosity and ordering of lamellar stacking. The morphology of the pillared zeolites and the niobium content were found to directly affect the catalytic activity. Specifically, we report on the activity of the MWW-type zeolites with niobium catalyzing the gas-phase oxidation of volatile organic compounds (VOCs), which is an important reaction for clean environmental. All produced MWW-type zeolites with niobium were catalytically active, even at low temperatures and low niobium loading, and provided excellent conversion efficiencies.

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Texto completo: Disponível Coleções: Bases de dados internacionais Base de dados: MEDLINE Idioma: Inglês Assunto da revista: Química Ano de publicação: 2020 Tipo de documento: Artigo País de afiliação: Brasil