Contribution of Fe and Protonic Sites in Calcined and Steamed ZSM-5 Zeolites to Oxidation of Benzene with N2O to Phenol and Selective Catalytic Reduction of NO with Propane to Nitrogen.

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388955%3A_____%2F03%3A54030181" target="_blank" >RIV/61388955:_____/03:54030181 - isvavai.cz</a>

Výsledek na webu

—

DOI - Digital Object Identifier

—

Jazyk výsledku

angličtina

Název v původním jazyce

Contribution of Fe and Protonic Sites in Calcined and Steamed ZSM-5 Zeolites to Oxidation of Benzene with N2O to Phenol and Selective Catalytic Reduction of NO with Propane to Nitrogen.

Popis výsledku v původním jazyce

NH4-(Fe)ZSM-5 zeolites with concentrations of Fe ranging from 30 to 2000 ppm, introduced into zeolites during their synthesis, either calcined in a dry oxygen at 720 K or steamed at 870 K in an oxygen stream with 30 % water vapor, were investigated in benzene oxidation with N2O to phenol and SCR-NOx to nitrogen. The concentration of Broensted and Lewis sites was determined by quantitative analysis of IR spectra of adsorbed d3-acetonitrile. The changes in Fe ion coordination were monitored by ESR spectraof Fe(III) ions. The Fe ions have been shown to control their performances in the above reactions, while the Al-related acid sites play only minor role. The steamed zeolites compared to calcined ones exhibited substantially higher activity in oxidationof benzene with N2O to phenol, while the SCR-NOx reaction to nitrogen was considerably suppressed. The steaming resulted in a dramatic decrease in concentration of Broensted sites, low concentration of Lewis sites.

Název v anglickém jazyce

Contribution of Fe and Protonic Sites in Calcined and Steamed ZSM-5 Zeolites to Oxidation of Benzene with N2O to Phenol and Selective Catalytic Reduction of NO with Propane to Nitrogen.

Popis výsledku anglicky

NH4-(Fe)ZSM-5 zeolites with concentrations of Fe ranging from 30 to 2000 ppm, introduced into zeolites during their synthesis, either calcined in a dry oxygen at 720 K or steamed at 870 K in an oxygen stream with 30 % water vapor, were investigated in benzene oxidation with N2O to phenol and SCR-NOx to nitrogen. The concentration of Broensted and Lewis sites was determined by quantitative analysis of IR spectra of adsorbed d3-acetonitrile. The changes in Fe ion coordination were monitored by ESR spectraof Fe(III) ions. The Fe ions have been shown to control their performances in the above reactions, while the Al-related acid sites play only minor role. The steamed zeolites compared to calcined ones exhibited substantially higher activity in oxidationof benzene with N2O to phenol, while the SCR-NOx reaction to nitrogen was considerably suppressed. The steaming resulted in a dramatic decrease in concentration of Broensted sites, low concentration of Lewis sites.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

—

Projekt

<a href="/cs/project/IAA4040007" target="_blank" >IAA4040007: Selektivní oxidace uhlovodíků katalyzované systémy Me-O/zeolit</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2003

Kód důvěrnosti údajů

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

Název periodika

Collection of Czechoslovak Chemical Communications

ISSN

0010-0765

e-ISSN

—

Svazek periodika

68

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

14

Strana od-do

1805-1818

Kód UT WoS článku

—

EID výsledku v databázi Scopus

—