Search Results - "Castoldi, L."

New insights on the adsorption, thermal decomposition and reduction of NOx over Pt- and Ba-based catalysts by Castoldi, L., Matarrese, R., Morandi, S., Righini, L., Lietti, L.

“…[Display omitted] •The adsorption of NO/O2 leads to a fast formation of nitrites.•The nature of the nitrite species depends on the basicity of the adsorption…”
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Oxidation of model soot by NO2 and O2 in the presence of water vapor by Matarrese, R., Castoldi, L., Lietti, L.

“…[Display omitted] •Model soot (Printex U) oxidation by NO2 and O2 in the presence of H2O.•Soot oxidation initiated by NO2 at low Temperatures.•Synergistic…”
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Pd-Doped SSZ-13 for Low-T NOx Adsorption: an Operando FT-IR Spectroscopy Study by Hamid, Y., Matarrese, R., Morandi, S., Castoldi, L., Lietti, L.

“…In this study, mechanistic aspects of NO adsorption/desorption over a home-made Pd/SSZ-13 passive NOx adsorber (PNA) catalyst are investigated. Operando FT-IR…”
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In-depth insights into N2O formation over Rh- and Pt-based LNT catalysts by Castoldi, L., Matarrese, R., Kubiak, L., Daturi, M., Artioli, N., Pompa, S., Lietti, L.

“…[Display omitted] •NO can disproportionate to N2O over reduced metal sites.•N2O formation from NO is favored at low temperatures and with poorly reactive…”
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Mechanistic aspects of the release and the reduction of NOx stored on Pt–Ba/Al2O3 by Castoldi, L., Righini, L., Matarrese, R., Lietti, L., Forzatti, P.

“…[Display omitted] •The NOx release is not driven by the ads–des equilibrium of stored NOx.•15NO isotopic exchange allows decoupling NOx release from its…”
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Pathways for N2O Formation/Reduction During Operation of Commercial LNT Catalysts by Matarrese, R., Castoldi, L., Morandi, S., Lietti, L.

“…In this study the pathways involved in N 2 O formation over a commercial LNT catalyst are addressed, when using H 2 as a reductant. For this purpose, flow…”
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Storage and Reduction of NO x Over LNT Catalysts by Forzatti, P., Lietti, L., Castoldi, L.

“…In this paper, fundamental issues of the NSR technology are addressed. The reaction paths and the mechanism involved in the storage of NOx and the relevance of…”
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On the activity and stability of Pt-K/Al2O3 LNT catalysts for diesel soot and NOx abatement by Matarrese, R., Castoldi, L., Artioli, N., Finocchio, E., Busca, G., Lietti, L.

“…•The soot decreases the NOx storage activity of Pt-K/Al2O3 catalyst at any temperature in the range 250–350°C.•The stability of the species stored over…”
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Al2O3-supported Pt/Rh catalysts for NOx removal under lean conditions by Castoldi, L., Matarrese, R., Daturi, M., Llorca, J., Lietti, L.

“…[Display omitted] •The adsorption of NO/O2 over Pt- and Rh-containing catalysts leads to nitrites at low T and of nitrates at high T.•Pt-based catalysts shows…”
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Study of the effect of Ba loading for catalytic activity of Pt–Ba/Al2O3 model catalysts by Castoldi, L., Nova, I., Lietti, L., Forzatti, P.

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Soot combustion: Reactivity of alkaline and alkaline earth metal oxides in full contact with soot by Matarrese, R., Castoldi, L., Lietti, L., Forzatti, P.

“…The activity in the soot combustion of K- and Ba-based catalysts in “loose” and “full” contact is investigated in this study. Under loose contact systems…”
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Catalytic behaviour of hybrid LNT/SCR systems: Reactivity and in situ FTIR study by Castoldi, L., Bonzi, R., Lietti, L., Forzatti, P., Morandi, S., Ghiotti, G., Dzwigaj, S.

“…In the LNT/SCR dual bed during the rich phase the reduction of NO x stored onto LNT catalyst gives NH 3 (I step) and then N 2 (II step). NH 3 slipped from LNT…”
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The NOx storage-reduction on Pt-K/Al2O3 Lean NOx Trap catalyst by CASTOLDI, L, LIETTI, L, FORZATTI, P, MORANDI, S, GHIOTTI, G, VINDIGNI, F

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Pt−Ba/Al2O3 NSR Catalysts at Different Ba Loading: Characterization of Morphological, Structural, and Surface Properties by Frola, F, Manzoli, M, Prinetto, F, Ghiotti, G, Castoldi, L, Lietti, L

“…Morphological, textural, and surface properties of several Pt−Ba/Al2O3 NO x storage reduction (NSR) catalysts at different Ba loading in the range 0−30 wt %…”
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Characterization and reactivity of Ce-promoted PtBa lean NOx trap catalysts by Infantes-Molina, A., Righini, L., Castoldi, L., Loricera, C.V., Fierro, J.L.G., Sin, A., Lietti, L.

“…HRTEM image of the Ce-doped PtBa/Al2O3 catalyst. [Display omitted] ► The presence of Ce does not alter the morphological characteristics of PtBa/Alumina…”
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The influence of CO2 and H2O on the storage properties of Pt-Ba/Al2O3 LNT catalyst studied by FT-IR spectroscopy and transient microreactor experiments by Morandi, S., Prinetto, F., Ghiotti, G., Castoldi, L., Lietti, L., Forzatti, P., Daturi, M., Blasin-Aubé, V.

“…•The effect of CO2 and H2O on the NOx storage on PtBa/Al2O3 is investigated.•NOx are stored on PtBa catalysts as nitrites and nitrates.•CO2 inhibits nitrite…”
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Effect of potassium on a model soot combustion: Raman and HRTEM evidences by Castoldi, L., Matarrese, R., Brambilla, L., Serafini, A., Tommasini, M., Lietti, L.

“…The effect of potassium on the oxidation of a model carbonaceous material (Printex U, namely, soot for brevity) has been investigated under isothermal…”
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New Insights on the Release and Reduction of NOx Stored over PGM-Based LNT Catalysts by Castoldi, L., Righini, L., Kubiak, L., Matarrese, R., Morandi, S., Lietti, L., Forzatti, P.

“…In this work, we have investigated the release and reduction of NO x (nitrates) stored on Rh–Ba/Al 2 O 3 and Pt–Rh–Ba/Al 2 O 3 catalysts and compared with…”
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Effect of soot on the storage-reduction performances of PtBa/Al₂O₃ LNT catalyst by Artioli, N, Matarrese, R, Castoldi, L, Lietti, L, Forzatti, P

“…The effect of soot on the storage-reduction performances of a PtBa/Al₂O₃ catalyst is investigated in this work. It is found that the presence of soot reduces…”
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NOx Adsorption Over Ce/Zr-Based Catalysts Doped with Cu and Ba by Giménez-Mañogil, J., Martínez-Munuera, J. C., Matarrese, R., Castoldi, L., Lietti, L., García-García, A.

“…In this study, Ce/Zr-based materials without noble metals in their formulation have been prepared, characterized and tested in NO x adsorption at different…”
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