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Dehydrogenation of propane over spinel-type gallia–alumina solid solution catalysts

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Abstract.
Dehydrogenation of propane to propylene in the presence or absence of carbon dioxide was performed
over a series of mixed GaxAl10−xO15 oxides (with x varying from 0 to 10) synthesized through an alcoholic
coprecipitation pathway. Among the various compositions of GaxAl10−xO15, the maximum activity was
observed for x = 8. Whereas the same tendency was observed for the specific activity normalized by
BET surface area, significantly enhanced stability was achieved for Ga2O3–Al2O3 with higher aluminum
content. A correlation between the NH3-TPD results and the initial activity for GaxAl10−xO15 reveals that
a high population of surface acid sites related to tetrahedral Ga3+ cations is important to achieving high
activity. The specific interaction between Ga2O3 and Al2O3 due to the formation of spinel-type γ -Ga2O3–
Al2O3 solid solutions is suggested to play a key role in the dispersion and distribution of surface gallium
sites, which makes GaxAl10−xO15 composites highly active and stable for the reaction.

Keywords:
Propane
Dehydrogenation
Gallia–alumina
Spinel
Solid solution
Lewis acidity

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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) 293–300

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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