Influence of the synthesis route on the catalytic oxidation of 1,2-dichloroethane over CeO2/H-ZSM5 catalysts

B. De Rivas, C. Sampedro, E. V. Ramos-Fernández, R. López-Fonseca, Jorge Gascon Sabate, M. Makkee, J. I. Gutiérrez-Ortiz*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

38 Scopus citations

Abstract

The performance of supported CeO2/HZSM-5 catalysts with a nominal CeO2 loading of 10 wt.% was evaluated for the oxidation of one of the most common chlorinated pollutants found in waste streams, namely 1,2-dichloroethane. The influence of the preparation method, such as impregnation in different media (water and ethanol), precipitation and ion exchange, was examined. Structural, morphological and physico-chemical changes caused as a function of the synthesis procedure were analysed by atomic emission spectroscopy, X-ray diffraction, BET measurements, transmission electronic microscopy, X-ray photoelectron spectroscopy, NH3-temperature- programmed desorption, adsorption of CO at low temperature followed by infrared spectroscopy, temperature-programmed reduction with hydrogen, energy dispersive X-ray spectroscopy and dynamic thermogravimetry coupled to mass spectrometry. The enhancement of the catalytic behaviour of the resulting ceria loaded samples with respect to plain H-ZSM5 could be explained on the basis of the synergetic effects of oxygen mobility and acid sites. In particular, the procedure based on impregnation with ethanol led to a highly dispersed ceria catalyst with a larger amount of oxygen vacancies. As a result, this catalyst required a temperature lower than 200 °C for attaining 50% conversion.

Original languageEnglish (US)
Pages (from-to)96-104
Number of pages9
JournalApplied Catalysis A: General
Volume456
DOIs
StatePublished - Apr 10 2013

Keywords

  • 1,2-dichloroethane
  • Catalytic oxidation
  • Cl-VOCs
  • H-ZSM-5 zeolite
  • Supported cerium oxide
  • Synthesis procedure

ASJC Scopus subject areas

  • Catalysis
  • Process Chemistry and Technology

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