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Effect of preparation method on structural characteristics and propane steam reforming performance of Ni–Al2O3 catalysts

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Abstract.
Propane steam reforming was studied over Ni–Al2O3 catalysts that were prepared by a conventional
impregnation (IM) method and a one-step sol–gel (SG) technique. Both Ni–Al2O3 catalysts showed similar
initial activity. However, IM-Ni–Al2O3 deactivated severely with time-on-stream of propane steam
reforming. The catalyst prepared using a SG technique demonstrated stable catalytic performance. The
two catalysts also showed major differences in product distribution, with SG catalyst giving much higher
yields of hydrogen. Catalysts were characterized with temperature-programmed reduction (TPR), Xray
photoelectron spectroscopy (XPS), temperature-programmed oxidation (TPO), transmission electron
microscopy (TEM), X-ray diffraction (XRD) and Raman spectroscopy. It was revealed that, with sol–gel
preparation, highly dispersed small Ni crystallites are formed with a strong interaction with the support.
This is shown to be important for coke suppression and catalyst stability.

Keywords:
Nickel catalyst
Sol–gel preparation
Metal–support interaction
Steam reforming
Deactivation
Sintering
Coking
Carbon filament

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Informasi Detail

Judul Seri

Journal of Molecular Catalysis A: Chemical

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Journal of Molecular Catalysis A: Chemical 297 (2009) 26–34

Bahasa

English

ISBN/ISSN

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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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