Carbon monoxide adsorption on alkali-metal exchanged BEA zeolite: IR and thermodynamics study

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F12%3A39895246" target="_blank" >RIV/00216275:25310/12:39895246 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.micromeso.2011.10.044" target="_blank" >http://dx.doi.org/10.1016/j.micromeso.2011.10.044</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.micromeso.2011.10.044" target="_blank" >10.1016/j.micromeso.2011.10.044</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Carbon monoxide adsorption on alkali-metal exchanged BEA zeolite: IR and thermodynamics study

Popis výsledku v původním jazyce

Interaction of carbon monoxide with extra-framework Na+ and K+ cations of the BEA zeolite was investigated by FTIR spectroscopy carried out under various temperatures, which allowed to obtain the corresponding IR spectra and to determine isosteric enthalpies of individual adsorption complexes. Three distinct bands were observed in the spectra: (i) a red-shifted band at 2112 and 2120 cm(-1) for Na- and K-BEA, respectively, assigned to O-down (isocarbonylic) complexes (ii) a blue-shifted band at 2180 and2167 cm(-1) for Na- and K-BEA, respectively, corresponding to C-down monocarbonyl complexes, and (iii) a band at the medium frequencies (2161 and 2149 cm(-1) for Na- and K-BEA, respectively) ascribing to linearly bridged carbonyl complexes on dual cationic sites, where CO molecule interacts with two nearby cations via both carbon and oxygen atoms. Adsorption enthalpies of CO adsorbed on Na- and K-BEA zeolite were estimated by means of temperature and pressure dependent FTIR spectroscopy.

Název v anglickém jazyce

Carbon monoxide adsorption on alkali-metal exchanged BEA zeolite: IR and thermodynamics study

Popis výsledku anglicky

Interaction of carbon monoxide with extra-framework Na+ and K+ cations of the BEA zeolite was investigated by FTIR spectroscopy carried out under various temperatures, which allowed to obtain the corresponding IR spectra and to determine isosteric enthalpies of individual adsorption complexes. Three distinct bands were observed in the spectra: (i) a red-shifted band at 2112 and 2120 cm(-1) for Na- and K-BEA, respectively, assigned to O-down (isocarbonylic) complexes (ii) a blue-shifted band at 2180 and2167 cm(-1) for Na- and K-BEA, respectively, corresponding to C-down monocarbonyl complexes, and (iii) a band at the medium frequencies (2161 and 2149 cm(-1) for Na- and K-BEA, respectively) ascribing to linearly bridged carbonyl complexes on dual cationic sites, where CO molecule interacts with two nearby cations via both carbon and oxygen atoms. Adsorption enthalpies of CO adsorbed on Na- and K-BEA zeolite were estimated by means of temperature and pressure dependent FTIR spectroscopy.

Druh

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

CEP obor

CF - Fyzikální chemie a teoretická chemie

OECD FORD obor

—

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)<br>S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Microporous and Mesoporous Materials

ISSN

1387-1811

e-ISSN

—

Svazek periodika

151

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

8

Strana od-do

149-156

Kód UT WoS článku

000300747000018

EID výsledku v databázi Scopus

—