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In situ Raman study on the partial oxidation of methane to synthesis gas over Rh/Al2O3 and Ru/Al2O3 catalysts

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Abstract.
In situ microprobe Raman and XRD techniques were used to follow the oxidation state of Rh/Al2O3 and
Ru/Al2O3 catalysts during the catalytic ignition process of the partial oxidation of methane (POM) to
synthesis gas. It was found that the catalyst was in the fully oxidized state before ignition of the POM
reaction, and abruptly changed its oxidation state at the temperature at which the POM reaction started.
After the POM reaction was ignited, the amount of Rh2O3 or RuO2 in the catalyst at the entrance of the
catalyst bed was below the detection level of Raman spectroscopy. Due to the greater M–O bond strength
of Ru–O compared with Rh–O, Ru/Al2O3 demonstrated a greater tendency to oxidize than Rh/Al2O3 under
the POM conditions. This factor affects the oxygen coverage on the two catalysts under reaction
conditions and consequently affects the pathways of synthesis gas formation.

Keywords:
Methane partial oxidation
Synthesis gas
Rh/Al2O3
Ru/Al2O3
In situ Raman
In situ X-ray powder diffraction
Reaction mechanism

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Informasi Detail

Judul Seri

Journal of Catalysis

No. Panggil

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Penerbit

London : Elsevier Inc.., 2008

Deskripsi Fisik

Journal of Catalysis 256 (2008) 192–203

Bahasa

English

ISBN/ISSN

00219517

Klasifikasi

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Tipe Isi

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Tipe Media

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Tipe Pembawa

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Edisi

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Subjek

KIMIA

Info Detail Spesifik

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Pernyataan Tanggungjawab

agus

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