Cu-ZSM-5 zeolite highly active in reduction of NO with decane under water vapor presence - Comparison of decane, propane and propene by in situ FTIR
Result description
Selective catalytic reduction of NOx (SCR-NOx) with decane, and for comparison with propane and propene over Cu-ZSM-5 zeolite (Cu/ Al 0,49, Si/Al 13.2) was investigated under presence and absence of water vapor. Decane behaves in SCR-NOx like propene, i.e. the Cu-zeolite activity increased under increasing concentration of water vapor, as demonstrated by a shift of the NOx-N-2 conversion to lower temperatures, in contrast to propane, where the NOx-N-2 Conversion is highly suppressed. In situ FTIR spectra of sorbed intermediates revealed similar spectral features for C10H22- and C3H6-SCR-NOx, where -CHx, R-NO2, -NO3-, Cu+-CO, -CN, -NCO and -NH species were found. On contrary, with propane -CHx, R-NO2, NO3-, Cu+-CO represented prevailing species. A comparison of the in situ FTIR spectra (T-O-T and intermediate vibrations) recorded at pulses of propene and propane, moreover, under presence and absence of water vapor in the reaction mixture...
Keywords
The result's identifiers
Result code in IS VaVaI
Alternative codes found
RIV/00216275:25310/05:00003293
Result on the web
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DOI - Digital Object Identifier
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Alternative languages
Result language
angličtina
Original language name
Cu-ZSM-5 zeolite highly active in reduction of NO with decane under water vapor presence - Comparison of decane, propane and propene by in situ FTIR
Original language description
Selective catalytic reduction of NOx (SCR-NOx) with decane, and for comparison with propane and propene over Cu-ZSM-5 zeolite (Cu/ Al 0,49, Si/Al 13.2) was investigated under presence and absence of water vapor. Decane behaves in SCR-NOx like propene, i.e. the Cu-zeolite activity increased under increasing concentration of water vapor, as demonstrated by a shift of the NOx-N-2 conversion to lower temperatures, in contrast to propane, where the NOx-N-2 Conversion is highly suppressed. In situ FTIR spectra of sorbed intermediates revealed similar spectral features for C10H22- and C3H6-SCR-NOx, where -CHx, R-NO2, -NO3-, Cu+-CO, -CN, -NCO and -NH species were found. On contrary, with propane -CHx, R-NO2, NO3-, Cu+-CO represented prevailing species. A comparison of the in situ FTIR spectra (T-O-T and intermediate vibrations) recorded at pulses of propene and propane, moreover, under presence and absence of water vapor in the reaction mixture...
Czech name
Cu-ZSM-5 zeolit vysoce aktivní v redukci NO dekanem za přítomnosti vody
Czech description
Selektivní katalytická redukce NOx (SCR-NOx) dekanem, a pro srovnání propanem a propenem, na Cu-ZSM-5 zeolitu (Cu/Al 0,49, Si/Al 13,2) byla studována za přítomnosti i nepřítomnosti vodní páry. Dekan se chová v SCR-NOx jako propen, tzn. Aktivita Cu-zeolitu roste s rostoucí koncentrací vodní páry, jak bylo ukázáno posunem NOx-N2 konverze k nižším teplotám, na rozdíl od propanu, u kterého je konverze NOx-N2 silně potlačena. In situ FTIR spektra sorbovaných intermediátů ukázaly obdobná spektra pro C10H22- aC3H6-NOx, u kterých byly nalezeny ?CHx, R-NO2, -NO3-, Cu+-CO, -CN, -NCO a ?NH specie. Naproti tomu s propanem převládaly povrchové struktury ?CHx, R-NO2, -NO3- a Cu+-CO. Porovnání in situ FTIR spekter (vibrace T-O-T a intermediátů) zaznamenané v pulsechpropenu a propanu za přítomnosti nebo absence vodní páry v reakční směsi kromě toho ukázaly, že redoxní cyklus Cu2+-Cu+ pracuje v reakci C3H6-SCR-NOx jak za přítomnosti tak i absence vodní páry, ...
Classification
Type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CF - Physical chemistry and theoretical chemistry
OECD FORD branch
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Result continuities
Project
GD203/03/H140: Organised materials for highly selective catalytic and separation processes
Continuities
Z - Vyzkumny zamer (s odkazem do CEZ)
Others
Publication year
2005
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Applied Catalysis. B - Environmental
ISSN
0926-3373
e-ISSN
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Volume of the periodical
60
Issue of the periodical within the volume
3-4
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
10
Pages from-to
201-210
UT code for WoS article
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EID of the result in the Scopus database
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Basic information
Result type
Jx - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP
CF - Physical chemistry and theoretical chemistry
Year of implementation
2005