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A novel experimental set-up for characterizing supported metal oxide catalysts under working conditions has been developed. The set-up combines product analysis using on-line mass spectrometry (MS) with catalyst characterization by time-resolved operando UV-VIS and Raman spectroscopy. The potentials of this approach are illustrated by the propane dehydrogenation over a chromium oxide on alumina catalyst. It is demonstrated that these spectroscopic techniques give valuable complimentary information on the changing catalyst performance during successive propane dehydrogenation operating cycles.
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Nijhuis et al. (2003) studied this question.
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