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Effect of La2O3 on Ru/CeO2-La2O3 Catalyst for Ammonia Synthesis

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Abstract
A series of CeO2-La2O3 supported ruthenium catalysts were prepared by co-precipitation method and the
as-obtained samples were characterized by N2 physisorption, X-ray diffraction, CO chemisorption, H2-TPR, H2-
TPD and XPS. The activity test shows that ammonia concentration of the catalyst with 10% La is 13.9% at
10 MPa, 10,000 h-1, 450 C, which is 17% higher than that of Ru/CeO2. La doping can improve the activity of
Ru-ceria catalyst for ammonia synthesis by facilitating the reduction of oxygen which subsists in the cerium oxide surface. In addition, it can be realized that the test of catalyst stability proves the stability performance of Ru/CeO2-La2O3 catalyst within the reaction time of 55 h.

Keywords: Co-precipitation
Ruthenium
CeO2-La2O3
Ammonia synthesis
La doping

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Ketersediaan

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Informasi Detail

Judul Seri

Catalysis Letter

No. Panggil

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Penerbit

New York : Springer Science Business Media., 2009

Deskripsi Fisik

Catal Lett (2009) 133:382–387

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

Versi lain/terkait

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