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Impact of soot‐NSR catalyst contact depending on reactive gas composition on NO x storage
Author(s) -
Wu Dongliang L.,
Tschamber Valérie,
Limousy Lionel,
Fechete Ioana,
Garin Francois
Publication year - 2016
Publication title -
environmental progress and sustainable energy
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.495
H-Index - 66
eISSN - 1944-7450
pISSN - 1944-7442
DOI - 10.1002/ep.12179
Subject(s) - catalysis , soot , carbon black , carbon fibers , chemistry , adsorption , chemical engineering , inorganic chemistry , materials science , combustion , organic chemistry , composite material , natural rubber , composite number , engineering
Interaction between a model soot (carbon black) and a model NO x storage reduction catalyst (Pt‐Ba/Al 2 O 3 ) is investigated as a function of the strength of the carbon–catalyst contact and the presence or not of H 2 O in the reactive gas flow. Experiments performed at laboratory scale, using a fixed bed reactor, revealed that the inhibiting effect of carbon on the NO x storage capacity (NSC) of the catalyst increases with the strength of carbon–catalyst contact and affects NO x adsorption on both Al sites and Ba sites, whereas the oxidative function of the catalyst (Pt sites) is not affected. In the presence of water in the reactive gas flow, it was observed that carbon prevents the inhibition of the oxidative function of the catalyst by H 2 O. On the other hand, the inhibiting effect of carbon on NSC decreases. Hence, a noncumulative effect of carbon and H 2 O impacts on NSC is observed. © 2015 American Institute of Chemical Engineers Environ Prog, 35: 14–19, 2016