Reduction mechanism of selective NO reduction on Pd-NiO/(Y0.99Ba0.01)2O3 catalyst

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Abstract

Y(Ba)2O3 catalyst loaded with 1 wt% Pd and 3.2 wt% NiO, Pd-NiO/(Y0.99Ba0.01)2O3, was found to be highly active to the selective reduction of NO with C3H6. The adsorption of NO on both (Y0.99Ba0.01)2O3 and Pd-NiO loaded one was studied using temperature-programmed desorption, pulsed reaction analysis and in-situ Fourier transform infrared (FTIR) spectroscopy. It was determined that NO is readily adsorbed on (Y0.99Ba0.01)2O3, primarily via the formation of nitrite and nitrate species. The addition of Pd-NiO assists in activating NO decomposition at lower temperatures as well as increasing the extent of NO adsorption. The reaction of NO with C3H6 and O2 on the Pd-NiO/(Y0.99Ba0.01)2O3 was also studied using pulsed reaction analysis and in-situ FTIR under NO selective reduction condition. The results demonstrated that the mechanism involves the reaction of −C2Hx or −CH3 adsorption species generated via the disproportionation of C3H6 with nitrate species to form CNO or C2HxNOy (x, y = 2,3) intermediates. These intermediates readily react with NO and O2 to form the products CO2, N2 and H2O.

Original languageEnglish
Pages (from-to)90-97
Number of pages8
JournalApplied Catalysis A: General
Volume550
DOIs
Publication statusPublished - Jan 25 2018

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Adsorption
Nitrates
Catalysts
Temperature programmed desorption
Nitrites
Fourier transform infrared spectroscopy
Fourier transforms
Infrared radiation
Decomposition
Temperature

All Science Journal Classification (ASJC) codes

  • Catalysis
  • Process Chemistry and Technology

Cite this

Reduction mechanism of selective NO reduction on Pd-NiO/(Y0.99Ba0.01)2O3 catalyst. / Liu, Lin; Ishihara, Tatsumi.

In: Applied Catalysis A: General, Vol. 550, 25.01.2018, p. 90-97.

Research output: Contribution to journalArticle

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abstract = "Y(Ba)2O3 catalyst loaded with 1 wt{\%} Pd and 3.2 wt{\%} NiO, Pd-NiO/(Y0.99Ba0.01)2O3, was found to be highly active to the selective reduction of NO with C3H6. The adsorption of NO on both (Y0.99Ba0.01)2O3 and Pd-NiO loaded one was studied using temperature-programmed desorption, pulsed reaction analysis and in-situ Fourier transform infrared (FTIR) spectroscopy. It was determined that NO is readily adsorbed on (Y0.99Ba0.01)2O3, primarily via the formation of nitrite and nitrate species. The addition of Pd-NiO assists in activating NO decomposition at lower temperatures as well as increasing the extent of NO adsorption. The reaction of NO with C3H6 and O2 on the Pd-NiO/(Y0.99Ba0.01)2O3 was also studied using pulsed reaction analysis and in-situ FTIR under NO selective reduction condition. The results demonstrated that the mechanism involves the reaction of −C2Hx or −CH3 adsorption species generated via the disproportionation of C3H6 with nitrate species to form CNO or C2HxNOy (x, y = 2,3) intermediates. These intermediates readily react with NO and O2 to form the products CO2, N2 and H2O.",
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N2 - Y(Ba)2O3 catalyst loaded with 1 wt% Pd and 3.2 wt% NiO, Pd-NiO/(Y0.99Ba0.01)2O3, was found to be highly active to the selective reduction of NO with C3H6. The adsorption of NO on both (Y0.99Ba0.01)2O3 and Pd-NiO loaded one was studied using temperature-programmed desorption, pulsed reaction analysis and in-situ Fourier transform infrared (FTIR) spectroscopy. It was determined that NO is readily adsorbed on (Y0.99Ba0.01)2O3, primarily via the formation of nitrite and nitrate species. The addition of Pd-NiO assists in activating NO decomposition at lower temperatures as well as increasing the extent of NO adsorption. The reaction of NO with C3H6 and O2 on the Pd-NiO/(Y0.99Ba0.01)2O3 was also studied using pulsed reaction analysis and in-situ FTIR under NO selective reduction condition. The results demonstrated that the mechanism involves the reaction of −C2Hx or −CH3 adsorption species generated via the disproportionation of C3H6 with nitrate species to form CNO or C2HxNOy (x, y = 2,3) intermediates. These intermediates readily react with NO and O2 to form the products CO2, N2 and H2O.

AB - Y(Ba)2O3 catalyst loaded with 1 wt% Pd and 3.2 wt% NiO, Pd-NiO/(Y0.99Ba0.01)2O3, was found to be highly active to the selective reduction of NO with C3H6. The adsorption of NO on both (Y0.99Ba0.01)2O3 and Pd-NiO loaded one was studied using temperature-programmed desorption, pulsed reaction analysis and in-situ Fourier transform infrared (FTIR) spectroscopy. It was determined that NO is readily adsorbed on (Y0.99Ba0.01)2O3, primarily via the formation of nitrite and nitrate species. The addition of Pd-NiO assists in activating NO decomposition at lower temperatures as well as increasing the extent of NO adsorption. The reaction of NO with C3H6 and O2 on the Pd-NiO/(Y0.99Ba0.01)2O3 was also studied using pulsed reaction analysis and in-situ FTIR under NO selective reduction condition. The results demonstrated that the mechanism involves the reaction of −C2Hx or −CH3 adsorption species generated via the disproportionation of C3H6 with nitrate species to form CNO or C2HxNOy (x, y = 2,3) intermediates. These intermediates readily react with NO and O2 to form the products CO2, N2 and H2O.

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