CO and hydrocarbon light-off inhibition by pre-adsorbed NOx on Pt/CeO2/Al2O3 and Pd/CeO2/Al2O3 diesel oxidation catalysts

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F60461373%3A22340%2F19%3A43919364" target="_blank" >RIV/60461373:22340/19:43919364 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S0009250919306931?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0009250919306931?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ces.2019.115201" target="_blank" >10.1016/j.ces.2019.115201</a>

Jazyk výsledku

angličtina

Název v původním jazyce

CO and hydrocarbon light-off inhibition by pre-adsorbed NOx on Pt/CeO2/Al2O3 and Pd/CeO2/Al2O3 diesel oxidation catalysts

Popis výsledku v původním jazyce

Diesel oxidation catalysts (DOC) for abatement of CO and hydrocarbon (HC) emissions are commonly based on PtPd/CeO2/Al2O3 formulations. PdPt/CeO2-ZrO2 or Pd/zeolite materials are also used in passive NOx adsorbers (PNA) that capture nitrogen oxides during cold start. The DOC and PNA functions can be integrated into one catalytic device. However, the adsorbed NOx species may inhibit the CO and HC light-off. Aim of this work is to investigate this inhibition effect on model Pt/CeO2/Al2O3 and Pd/CeO2/Al2O3 oxidation catalysts. Isothermal NOx adsorption experiments were performed at 80 °C, 120 °C and 160 °C, followed by temperature programmed desorption. Comparative CO and C3H6 light-off experiments on a catalyst with pre-adsorbed NOx revealed an increase of the light-off temperature by up to 30 °C relative to that of a pre-reduced and pre-oxidized catalyst. The inhibition effect was stronger on Pt/CeO2/Al2O3 than on Pd/CeO2/Al2O3 and its extent depended on the amount of adsorbed NOx. © 2019 Elsevier Ltd

Název v anglickém jazyce

CO and hydrocarbon light-off inhibition by pre-adsorbed NOx on Pt/CeO2/Al2O3 and Pd/CeO2/Al2O3 diesel oxidation catalysts

Popis výsledku anglicky

Diesel oxidation catalysts (DOC) for abatement of CO and hydrocarbon (HC) emissions are commonly based on PtPd/CeO2/Al2O3 formulations. PdPt/CeO2-ZrO2 or Pd/zeolite materials are also used in passive NOx adsorbers (PNA) that capture nitrogen oxides during cold start. The DOC and PNA functions can be integrated into one catalytic device. However, the adsorbed NOx species may inhibit the CO and HC light-off. Aim of this work is to investigate this inhibition effect on model Pt/CeO2/Al2O3 and Pd/CeO2/Al2O3 oxidation catalysts. Isothermal NOx adsorption experiments were performed at 80 °C, 120 °C and 160 °C, followed by temperature programmed desorption. Comparative CO and C3H6 light-off experiments on a catalyst with pre-adsorbed NOx revealed an increase of the light-off temperature by up to 30 °C relative to that of a pre-reduced and pre-oxidized catalyst. The inhibition effect was stronger on Pt/CeO2/Al2O3 than on Pd/CeO2/Al2O3 and its extent depended on the amount of adsorbed NOx. © 2019 Elsevier Ltd

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20401 - Chemical engineering (plants, products)

Projekt

<a href="/cs/project/GA17-26018S" target="_blank" >GA17-26018S: Reakční kinetika v oxidačních katalyzátorech pro konverzi dieselových výfukových plynů za nízkých teplot</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2019

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Chemical Engineering Science

ISSN

0009-2509

e-ISSN

—

Svazek periodika

209

Číslo periodika v rámci svazku

Neuveden

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

7

Strana od-do

—

Kód UT WoS článku

000502087500007

EID výsledku v databázi Scopus

2-s2.0-85072187032