Catalytic performance of zirconia-supported oxides (Nb2O5, SiO2 and WO3) in ethanol upgrading: influence of acid-base properties

Desempenho catalítico de óxidos suportados em zircônia (Nb2O5, SiO2 e WO3) no beneficiamento de etanol: influência das propriedades ácido-básicas

Authors

  • Mathilde Marie Catherine Laird
  • Victoria Gonçalves Ferreira Pereira
  • Marcos Anacleto da Silva
  • Felipe da Silva Lopes
  • Henrique Poltronieri Pacheco
  • Clarissa Perdomo Rodrigues
  • Fabio Souza Toniolo

DOI:

https://doi.org/10.34117/bjdv8n8-189

Keywords:

ethanol conversion, niobia, metal oxide catalyst, acid-base properties, deactivation

Abstract

We present a study of ethanol upgrading on zirconia-based metal oxides including commercial SiO2/ZrO2, WO3/ZrO2, pure zirconia catalysts and a Nb2O5/ZrO2 catalyst obtained by wet impregnation. Chemical composition, crystallographic features, textural and acid-base properties (NH3 and CO2 temperature programmed desorption) were determined. Reactivity of the catalysts was investigated by temperature programmed surface reaction and isothermal catalytic tests. Catalyst performance was strongly dependent on the acid-base properties which favored the ethanol dehydration to ethylene. All modified zirconia-base catalysts yielded C3 and C4 compounds above 623 K. This study consequently emphasizes the preponderant role of both acid and basic site in the formation of higher products from ethanol.

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Published

2022-08-17

How to Cite

Laird, M. M. C., Pereira, V. G. F., da Silva, M. A., Lopes, F. da S., Pacheco, H. P., Rodrigues, C. P., & Toniolo, F. S. (2022). Catalytic performance of zirconia-supported oxides (Nb2O5, SiO2 and WO3) in ethanol upgrading: influence of acid-base properties: Desempenho catalítico de óxidos suportados em zircônia (Nb2O5, SiO2 e WO3) no beneficiamento de etanol: influência das propriedades ácido-básicas. Brazilian Journal of Development, 8(8), 57713–57745. https://doi.org/10.34117/bjdv8n8-189

Issue

Vol. 8 No. 8 (2022)

Section

Original Papers