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An in situ Fourier transform infrared study on the mechanism of NO reduction by acetylene over mordenite-based catalysts

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Abstract.
Selective catalytic reduction of NO with acetylene (C2H2-SCR) over mordenite-based catalysts (HMOR,
0.5% Mo/HMOR and NaMOR) was investigated by in situ Fourier transform infrared spectroscopy.
A possible mechanism was proposed to explain catalytic performance of the mordenite-based catalysts in
the C2H2-SCR: Nitrosonium ions (NO+) and bidentate nitrate are reactive nitric species towards acetylene
at 250 ◦C. Isocyanate species thus formed are then hydrolyzed to acid amide species that are crucial
intermediate of the C2H2-SCR. Bridging nitrate species become reactive towards the reductant when
reaction temperature increased to 300 ◦C. Molybdenum loading on HMOR zeolite considerably increased
the population of bridging nitrate species and therefore enhanced the title reaction above 300 ◦C.

Nitric oxide
Nitrate
Nitrosonium ions
Acid amide species
Mordenite
Acetylene

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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 257 (2008) 291–296

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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