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A temperature programmed desorption investigation on the interaction of Ba0.5Sr0.5Co0.8Fe0.2O3d perovskite oxides with CO2 in the absence and presence of H2O and O2

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Abstract
The adsorption of CO2 on Ba0.5Sr0.5Co0.8Fe0.2O3-d (BSCF) perovskite oxides in the absence and presence of O2 and H2O at various temperatures was investigated by temperature programmed desorption (TPD). XRD was used to characterize the phase of the samples before and after adsorption. No CO2 desorption peak was observed when CO2 was adsorbed on BSCF at room temperature. A CO2 desorption peak from the decomposition of surface Sr0.6Ba0.4CO3 appeared after CO2 was adsorbed at 400–700 oC. The reactivity of CO2 with BSCF increased with
increasing temperature, and the resulted carbonate became more stable. When CO2 and O2 were co-adsorbed, the CO2 desorption peak shifted to lower temperature and the peak area decreased compared with when only CO2 was adsorbed, which was due to the competitive adsorption of CO2 and O2. The adsorption of CO2 on BSCF was promoted in the presence of H2O. ACO2 desorption peak ranging from ca. 250 to 500 oC, assigned to
the decomposition of the bicarbonate, was observed when H2O was added. The amount of CO2 adsorbed on Ba1-xSrxCo0.8Fe0.2O3-d increased when the barium doping level increased from 0.3 to 1.

Keywords: Ba0.5Sr0.5Co0.8Fe0.2O3d; Perovskite oxides; Temperature programmed desorption; Carbon dioxide

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Informasi Detail

Judul Seri

Applied Catalysis B: Environmental

No. Panggil

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Penerbit

London : Elsevier B.V.., 2008

Deskripsi Fisik

Applied Catalysis B: Environmental 80 (2008) 24–31

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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