Managanese oxides as catalysts for the selective reduction of nitrobenzene to nitrosobenzene
- Leiden Univ. (Netherlands); and others
The activity and selectivity of various MnO{sub x} catalysts for the selective reduction of nitrobenzene to nitrosobenzene have been studied, measuring the rate in a continuous flow reactor. Characterisation of the catalysts has been performed with XRD, IR, UV/VIS, EM, and TPR. It appeared that the steady-state catalyst is in cases the spinel Mn{sub 3}O{sub 4} in a slightly reduced form. Without the addition of an external reductant to the feed, nitrobenzene was not only reduced but also oxidised, which created oxygen vacancies in the catalyst surface. Addition of an external reductant did not cause a change in the amount of nitrosobenzene formed, but the concentration of side products, like aniline and dimerisation products, increased. It is suggested that the selective reduction of nitrobenzene with the catalyst Mn{sub 3}O{sub 4} runs by the Mars and Van Krevelen mechanism. 28 refs., 6 figs., 2 tabs.
- OSTI ID:
- 98930
- Journal Information:
- Journal of Catalysis, Journal Name: Journal of Catalysis Journal Issue: 2 Vol. 149; ISSN 0021-9517; ISSN JCTLA5
- Country of Publication:
- United States
- Language:
- English
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