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Cu/SiO2 catalysts prepared by the ammonia-evaporation method: Texture, structure, and catalytic performance in hydrogenation of dimethyl oxalate to ethylene glycol

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Abstract.
Cu/SiO2 catalysts prepared by the ammonia-evaporation (AE) method have been systematically characterized
focusing on the effect of the AE temperature during catalyst preparation. It is found that the texture,
composition, and structure of the calcined and reduced Cu/SiO2 catalysts were profoundly affected by
the AE temperature. Based on characterizations and previous findings, the copper species on calcined
Cu/SiO2 samples and reduced Cu/SiO2 catalysts were assigned. In gas-phase hydrogenation of dimethyl
oxalate (DMO) to ethylene glycol (EG), the evolution of the catalytic activity with the Cu0 and Cu+
surface areas suggested that Cu+ also participated in the hydrogenation process. The cooperative effect
between Cu0 and Cu+ is proposed to be responsible for the highest hydrogenation activity of the Cu/SiO2
catalyst prepared at the AE temperature of 363 K, on which an EG yield of 98% was obtained under the
optimized hydrogenation conditions.

Keywords:
Cu/SiO2
Ammonia-evaporation
Copper phyllosilicate
Dimethyl oxalate
Ethylene glycol
Hydrogenation

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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) 172–180

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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