Study of adsorption sites heterogeneity in zeolites by means of coupled microcalorimetry with volumetry

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216275%3A25310%2F11%3A39892369" target="_blank" >RIV/00216275:25310/11:39892369 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1007/s10973-010-1108-y" target="_blank" >http://dx.doi.org/10.1007/s10973-010-1108-y</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s10973-010-1108-y" target="_blank" >10.1007/s10973-010-1108-y</a>

Result language

angličtina

Original language name

Study of adsorption sites heterogeneity in zeolites by means of coupled microcalorimetry with volumetry

Original language description

Adsorption of CO2 as probe molecule on alkali-metal zeolites of MFI structure was investigated by joint volumetry-calorimetry. Consideration was given to the interpretation of the heat evolved when a probe molecule is adsorbed on the surface. In particular, the number and the strength of adsorption sites are discussed as functions of zeolite structure, concentration, and nature of extra-framework cation. The adsorption heats (qiso) of CO2 interaction with alkali-metal cations decrease for MFI zeolite with high Si/Al in the sequence Li+ } Na+ } K+ from 54 kJ/mol to 49 and 43 kJ/mol, respectively. In addition, the adsorption heats are influenced by concentration of Al in the framework. This phenomenon is attributed to formation of bridged CO2 adsorptioncomplexes formed between two cations. On the base of quantitative analysis of adsorption processes, presence of geminal adsorption complexes was suggested for adsorption at higher equilibrium pressures.

Czech name

—

Czech description

—

Type

J_x - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)

CEP classification

CF - Physical chemistry and theoretical chemistry

OECD FORD branch

—

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2011

Confidentiality

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

Name of the periodical

Journal of Thermal Analysis and Calorimetry (Paper)

ISSN

1388-6150

e-ISSN

—

Volume of the periodical

105

Issue of the periodical within the volume

2

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

7

Pages from-to

443-449

UT code for WoS article

000293213000009

EID of the result in the Scopus database

—