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Sustainable Ru-doped Ni catalyst derived from hydrotalcite in propane reform

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Abstract.
Trace amount of Ru-doped Ni/Mg(Al)O catalyst was prepared from hydrotalcite precursor and was tested in
the reforming of propane under daily start-up and shut-down (DSS) operation. Mg(Ni,Al)O periclase derived
from the hydrotalcite was dispersed in an aqueous solution of Ru nitrate, followed by calcination and
reduction. Finely dispersed Ni–Ru was supported on Mg(Al)O periclase particles. The activity as well as the
sustainability in the propane reforming was compared with the commercial Al2O3-supported Ni and Ru
catalysts. The DSS operations of partial oxidation, steam reforming and autothermal reforming were carried
out under steam or air purging conditions. The Ru doping suppressed the surface oxidation of Ni particles on
the Ni/Mg(Al)O catalyst, resulting in the high activity as well as the high sustainability in all reforming
reactions except under steam–air combined purging. The deactivation was effectively suppressed by
increasing either reaction temperature or Ru doping even under steam–air combined purging. Ni particles
also suffered by sintering, but the sintered Ni particles were redispersed and the activity was sustained
during DSS operations. Air-purged partial oxidation was the most effective for the redispersion of the
sintered Ni particles. This likely indicates that the finely dispersed Ni particles were continuously
regenerated by reversible reduction–oxidation between Ni0 and Ni2+ via Mg(Ni)Al periclase assisted by
hydrogen spillover from Ru or NiRu alloy.

Keywords: Propane reforming, H2 production, Ru–Ni/Mg(Al)O catalyst, Memory effect, Hydrotalcite

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Informasi Detail

Judul Seri

Applied Clay Science

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Applied Clay Science 43 (2009) 49–56

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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