Effect of transition metal on stability and activity of La-Ca-M-(Al)-O (M ¼ Co, Cr, Fe and Mn) perovskite oxides during partial oxidation of methane

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F17%3APU124494" target="_blank" >RIV/00216305:26620/17:PU124494 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.ijhydene.2017.06.075" target="_blank" >http://dx.doi.org/10.1016/j.ijhydene.2017.06.075</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.ijhydene.2017.06.075" target="_blank" >10.1016/j.ijhydene.2017.06.075</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Effect of transition metal on stability and activity of La-Ca-M-(Al)-O (M ¼ Co, Cr, Fe and Mn) perovskite oxides during partial oxidation of methane

Popis výsledku v původním jazyce

Perovskite oxides of the type of LaxCa1-xMyAl1-yO3-d (M ¼ Co, Cr, Fe, Mn; x ¼ 0.5; y ¼ 0.7e1.0) were prepared using the polymerization methods and evaluated via N2 adsorption, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning transmission electron microscopy (STEM), energy dispersive X-ray (EDX) spectroscopy, temperature-programmed reduction by hydrogen (TPR-H2) and temperature-programmed oxidation by oxygen (TPOO2). Catalytic behaviour of the perovskite oxides during methane oxidation was studied using a tubular fixed-bed reactor. In a partial oxidation, which proceeded in two steps, there was total oxidation in the first step and CO2 and H2O were formed; in the second step, the total oxidation products oxidized methane by (dry and wet) reforming reactions to yield CO and H2. Total oxidation and the two reforming reactions proceeded on two types of an active centre formed by transition metal ions, oxygen vacancies and oxide ions. The catalytic system La-Ca-Co-Al-O which contained aluminium, decomposed in partial oxidation of methane (POM) into a composite that contained firmly bonded cobalt nanoparticles in the surface of a substrate made up of La2O3, CaO and Al2O3 which catalysed POM with a high methane conversion and hydrogen selectivity.

Název v anglickém jazyce

Effect of transition metal on stability and activity of La-Ca-M-(Al)-O (M ¼ Co, Cr, Fe and Mn) perovskite oxides during partial oxidation of methane

Popis výsledku anglicky

Perovskite oxides of the type of LaxCa1-xMyAl1-yO3-d (M ¼ Co, Cr, Fe, Mn; x ¼ 0.5; y ¼ 0.7e1.0) were prepared using the polymerization methods and evaluated via N2 adsorption, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning transmission electron microscopy (STEM), energy dispersive X-ray (EDX) spectroscopy, temperature-programmed reduction by hydrogen (TPR-H2) and temperature-programmed oxidation by oxygen (TPOO2). Catalytic behaviour of the perovskite oxides during methane oxidation was studied using a tubular fixed-bed reactor. In a partial oxidation, which proceeded in two steps, there was total oxidation in the first step and CO2 and H2O were formed; in the second step, the total oxidation products oxidized methane by (dry and wet) reforming reactions to yield CO and H2. Total oxidation and the two reforming reactions proceeded on two types of an active centre formed by transition metal ions, oxygen vacancies and oxide ions. The catalytic system La-Ca-Co-Al-O which contained aluminium, decomposed in partial oxidation of methane (POM) into a composite that contained firmly bonded cobalt nanoparticles in the surface of a substrate made up of La2O3, CaO and Al2O3 which catalysed POM with a high methane conversion and hydrogen selectivity.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10403 - Physical chemistry

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2017

Kód důvěrnosti údajů

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

Název periodika

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY

ISSN

0360-3199

e-ISSN

1879-3487

Svazek periodika

42

Číslo periodika v rámci svazku

31

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

15

Strana od-do

19920-19934

Kód UT WoS článku

000408180900034

EID výsledku v databázi Scopus

2-s2.0-85021713612