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Impregnated carbon based catalyst for protection against carbon monoxide gas

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Abstract.
Activated carbon based palladium impregnated catalyst (Pd/C) was prepared for the reactive removal of
carbon monoxide (CO) gas under ambient air conditions. For this, active carbon of 1250 m2/g surface area
was impregnated with palladium salt to get Pd/C catalyst, containing palladium from 4.0 to 8.0% (w/w).
Catalytic efficiency of the catalyst against CO gas was determined under dynamic conditions by passing
CO–air mixture to the fixed bed of the Pd/C catalyst. Results indicated that Pd/C catalyst was
continuously adsorbing and actively removing CO gas during the course of the palladium catalyzed
reaction, i.e., CO + 1/2 O2-CO2 and was found capable of providing excellent protection against CO gas.
Moisture content (humidity) of inlet CO–air mixture indicated it to be an important factor affecting the
CO removal efficiency of the catalyst, as an increase in humidity after the CO breakthrough resulted in to
the activation of the catalyst due to the generation of hydroxyl groups and enhanced protection by the
regeneration of the catalyst. Study indicated that Pd/C catalyst works as a catalytic converter, i.e., the
continuous conversion of CO to CO2 using atmospheric oxygen and moisture. In order to determine the
shelf life, the Pd/C catalyst was also evaluated for its performance after accelerated ageing at 70 oC and
50% relative humidity (RH) for 3.75 and 7.5 months. The catalyst was found to be working efficiently for
3.75 months but after 7.5 months it could not provide 100% protection against CO gas, however, the same
catalyst started giving 100% protection after regeneration. Hence, studies indicated the Pd/C catalyst to
be a promising catalyst for the reactive removal of CO gas in enclosed spaces/compartments, coalmines,
fire accidents and for getting the protection for longer duration under ambient air conditions.

Keywords: Palladium, Catalyst, Carbon monoxide, Oxidation, Impregnation, Reproducibility

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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) 257–262

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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