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Induced low tempera...
Induced low temperature catalytic ignition by transient changes in the gas composition
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- Carlsson, Per-Anders, 1972 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Skoglundh, Magnus, 1965 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Fridell, Erik, 1963 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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visa fler...
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- Jobson, Edward, 1961 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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- Andersson, Bengt, 1947 (författare)
- Chalmers tekniska högskola,Chalmers University of Technology
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visa färre...
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(creator_code:org_t)
- 2002
- 2002
- Engelska.
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Ingår i: Catalysis Today. - 0920-5861. ; 73:3-4, s. 307-313
- Relaterad länk:
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http://dx.doi.org/10...
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https://doi.org/10.1...
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https://research.cha...
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Abstract
Ämnesord
Stäng
- The effect of gas composition changes on the low temperature activity for supported platinum model catalysts has been studied. By introducing well-controlled periodic O2 pulses to a simple diluted gas mixture of CO and O2, a substantial improvement of the low temperature oxidation activity was observed. The reason for low activity on noble metals at low temperatures is often attributed to self-poisoning by CO. The improved catalytic performance observed is proposed to origin from the transients causing a surface reactant composition that is favourable for the reaction rate, i.e. lower degree of self-poisoning. This was also confirmed by in situ Fourier transform infrared spectroscopy in combination with mass spectrometry measurements, which gave evidence for the existence of a strong interplay between the gas phase concentration and the adsorbate composition for these catalysts.
Ämnesord
- TEKNIK OCH TEKNOLOGIER -- Kemiteknik (hsv//swe)
- ENGINEERING AND TECHNOLOGY -- Chemical Engineering (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Miljövetenskap (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Environmental Sciences (hsv//eng)
Nyckelord
- cold start emissions
- catalytic oxidation
- platinum
- DRIFT
- carbon monoxide
- self-poisoning
- in situ FT-IR
- low temperature activity
- transient changes
- periodic pulsing
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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