Combustion of diesel soot in NO/O2 presence. Cesium nitrate and gold catalysts

Ruiz, María Lucía; Lick, Ileana Daniela; Ponzi, Marta I.; Rodríguez‐Castellón, Enrique; Jiménez‐López, Antonio; Ponzi, Esther N.

doi:10.1016/j.apcata.2010.10.024

Cited by 16 publications

(20 citation statements)

References 30 publications

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“…Notably, there is no peak around 1266 cm −1 , which corresponds to the vibration of nitrite (NO 2 − ). 67,68 In addition, the C 1s spectra of the catalysts in Fig. 3(b) confirm the absence of carbonate bands on these two catalysts.…”

Section: Resultsmentioning

confidence: 53%

Niobium oxide promoted with alkali metal nitrates for soot particulate combustion: elucidating the vital role of active surface nitrate groups

Feng

Zhang

et al. 2022

Phys. Chem. Chem. Phys.

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Section: Resultsmentioning

confidence: 53%

Niobium oxide promoted with alkali metal nitrates for soot particulate combustion: elucidating the vital role of active surface nitrate groups

Feng

Zhang

et al. 2022

Phys. Chem. Chem. Phys.

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“…Thus, it is obligatory to develop a systematic perspective to improve low temperature CO oxidation. Alkali acts as an electron promotor to enhance the surface redox properties and is responsible for the low temperature CO and VOC oxidation [31][32][33][34]. The CO oxidation activity of noble metal and NM supported on ceria was enhanced by addition of AM and AEM [35][36][37][38].…”

Section: Introductionmentioning

confidence: 99%

Low temperature oxidation of CO using alkali- and alkaline-earth metal-modified ceria-supported metal catalysts: a review

Waikar

2021

Bull Mater Sci

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The present review devoted to the complete oxidation of CO using alkali-and alkaline-earth metal (AM/AEM)-modified ceria supported/mixed with noble metal and non-noble metal (NM). The AM/AEM-modified Ce supported/mixed with noble metal showed comparable CO oxidation with unmodified catalyst. However, AM/AEMmodified NM showed higher CO oxidation at lower temperature compared to the unmodified catalyst. The AM and AEM modifications were responsible for the formation of oxygen vacancies in Ce, which leads to the decrease in the CO and O 2 activation barrier. The dissociative oxygen adsorption on AM/AEM-modified Ce-supported/mixed with NM favours the CO oxidation at a lower temperature. However, AM/AEM-modified Ce-supported/mixed with noble metal showed CO adsorption with formation of superoxy and peroxy species, which leads to the comparable oxidation activity. The plausible mechanism for CO oxidation is explained in detail with correlation to the characterizations.

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“…The NMHCs that are the most difficult to eliminate are C3-C4, and polyaromatic compounds (PAHs), which present a level of high toxicity [2,3]. On the other hand, diesel soot consists of solid particles of small size, whose main component is carbon [4]. These particles are very small and can penetrate the lungs, which makes soot very harmful to health.…”

Section: Introductionmentioning

confidence: 99%

Zirconia-Supported Silver Nanoparticles for the Catalytic Combustion of Pollutants Originating from Mobile Sources

et al. 2019

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This work presents the physicochemical characterization and activity of zirconia-supported silver catalysts for the oxidation of pollutants present in diesel engine exhaust (propane, propene, naphthalene and soot). A series of silver-supported catalysts AgxZ (x = 1, 5 and 10 wt.%, Z = zirconia) were prepared, which were studied by various characterization techniques. The results show that silver is mainly found under the form of small metal nanoparticles (<10 nm) dispersed over the support. The metallic phase coexists with the AgOx oxidic phases. Silver is introduced onto the zirconia, generating Ag–ZrO2 catalysts with high activity for the oxidation of propene and naphthalene. These catalysts also show some activity for soot combustion. Silver species can contribute with zirconia in the catalytic redox cycle, through a synergistic effect, providing sites that facilitate the migration and availability of oxygen, which is favored by the presence of structural defects. This is a novel application of the AgOx–Ag/ZrO2 system in the combustion reaction of propene and naphthalene. The results are highly promising, given that the T50 values found for both model molecules are quite low.

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Combustion of diesel soot in NO/O2 presence. Cesium nitrate and gold catalysts

Cited by 16 publications

References 30 publications

Niobium oxide promoted with alkali metal nitrates for soot particulate combustion: elucidating the vital role of active surface nitrate groups

Niobium oxide promoted with alkali metal nitrates for soot particulate combustion: elucidating the vital role of active surface nitrate groups

Low temperature oxidation of CO using alkali- and alkaline-earth metal-modified ceria-supported metal catalysts: a review

Zirconia-Supported Silver Nanoparticles for the Catalytic Combustion of Pollutants Originating from Mobile Sources

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