Influence of acidity in MTBE synthesis on modified Beta zeolites

Authors

  • Adriano Morales Gonzales UEM
  • Pedro Augusto Arroyo UEM

DOI:

https://doi.org/10.4025/actascitechnol.v23i0.2772

Keywords:

MTBE, zeólita Beta, acidez, desaluminização, alumina extra-rede

Abstract

Synthesis of MTBE on dealuminated and leaching Beta zeolites is provided. Hydrothermal and chemical dealumination of HBeta zeolite leads to less active catalysts due to a decrease in the total concentration of Brí¶nsted acid sites. Furthermore, it has been verified that elimination of highly dispersed non-framework alumina species present in HBeta samples, by acid treatment, decreases catalytic activity, even though the zeolite has shown a higher content of Brí¶nsted acid sites. It might be suggested that highly dispersed cationic non-framework aluminum species could interact with framework hydroxyls, generating Brí¶nsted acid sites with enhanced catalytic activity. Thus, zeolite HBeta showed a maximum MTBE yield at 70oC, superior to the commercial catalyst (resin Amberlyst 15) and to other zeolites studied, within the context of reaction conditions utilized

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Published

2008-05-05

How to Cite

Gonzales, A. M., & Arroyo, P. A. (2008). Influence of acidity in MTBE synthesis on modified Beta zeolites. Acta Scientiarum. Technology, 23, 1407–1414. https://doi.org/10.4025/actascitechnol.v23i0.2772

Issue

Vol. 23 (2001)

Section

Chemical Engineering

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