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The influence of the preparation procedure on the storage and regeneration behavior of Pt and Ba based NOx storage and reduction catalysts

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Abstract.
The influence of the preparation procedure on the performance of NOx storage and reduction catalysts
was investigated by means of flow reactor experiments. Three catalysts were examined; one Pt/Al and
two Pt/Ba/Al samples. One of the Pt/Ba/Al samples was prepared with Pt impregnated on Al/Ba and one
with Ba impregnated on Al/Pt. The results clearly show that the preparation procedure influences the
behavior of NOx storage and reduction catalysts both during lean and rich conditions. The order of the
impregnation steps is crucial especially at higher temperatures; a higher storage capacity is obtained
when impregnating Al/Pt with Ba than when impregnating Al/Ba with Pt. The storage increased with as
much as 54% when adding Ba in the last step. The N2O and NH3 formation is also affected by the
preparation procedure; there is a clear dependency on the order of impregnation steps. Moreover, N2O is
not only formed during rich conditions but also in the beginning of the lean period over the Pt/Al and Al/
Pt/Ba samples.

Keywords: Preparation, Platinum, Barium, Alumina, Pt/Ba/Al, NOx storage, NOx regeneration, N2O formation, NH3 formation.

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Informasi Detail

Judul Seri

Applied Catalysis B: Environmental

No. Panggil

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Penerbit

London : Elsevier B.V.., 2009

Deskripsi Fisik

Applied Catalysis B: Environmental 88 (2009) 240–248

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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