skip to main content
Idioma:
Primo Advanced Search
Primo Advanced Search Query Term
Primo Advanced Search Query Term
Primo Advanced Search Query Term
Primo Advanced Search prefilters
Busca Simples

Modification by SiO2 of Alumina Support for Light Alkane Dehydrogenation Catalysts

Bekmukhamedov, Giyjaz E ; Mukhamed'yarova, Alya N ; Egorova, Svetlana R ; Lamberov, Alexander A

Catalysts, 2016-10, Vol.6 (10), p.162-162 [Periódico revisado por pares]

Basel: MDPI AG

Texto completo disponível

Citações Citado por
  • Título:
    Modification by SiO2 of Alumina Support for Light Alkane Dehydrogenation Catalysts
  • Autor: Bekmukhamedov, Giyjaz E ; Mukhamed'yarova, Alya N ; Egorova, Svetlana R ; Lamberov, Alexander A
  • Assuntos: Activation ; Alkanes ; alumina support ; Aluminum oxide ; Catalysis ; Catalysts ; Chemical reactions ; chromia-alumina catalyst ; Dehydrogenation ; isobutane dehydrogenation ; silica ; Silicon dioxide ; Surface chemistry
  • É parte de: Catalysts, 2016-10, Vol.6 (10), p.162-162
  • Notas: ObjectType-Article-1
    SourceType-Scholarly Journals-1
    ObjectType-Feature-2
    content type line 23
  • Descrição: Due to the continuously rising demand for C3-C5 olefins it is important to improve the performance of catalysts for dehydrogenation of light alkanes. In this work the effect of modification by SiO2 on the properties of the alumina support and the chromia-alumina catalyst was studied. SiO2 was introduced by impregnation of the support with a silica sol. To characterize the supports and the catalysts the following techniques were used: low-temperature nitrogen adsorption; IR-spectroscopy; magic angle spinning 29Si nuclear magnetic resonance; temperature programmed desorption and reduction; UV-Vis-, Raman- and electron paramagnetic resonance (EPR)-spectroscopy. It was shown that the modifier in amounts of 2.5-7.5 wt % distributed on the support surface in the form of SiOx-islands diminishes the interaction between the alumina support and the chromate ions (precursor of the active component). As a result, polychromates are the compounds predominantly stabilized on the surface of the modified support; under thermal activation of the catalyst and are reduced to the amorphous Cr2O3. This in turn leads to an increase in the activity of the catalyst in the dehydrogenation of isobutane.
  • Editor: Basel: MDPI AG
  • Idioma: Inglês
Voltar para lista de resultados
Ir para página anteriorAnterior Resultado  5 AvançarIr para próxima página

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.