The effect of pore size dimensions in isoreticular zeolites on carbon dioxide adsorption heats

0484207 - ÚFCH JH 2019 RIV NL eng J - Journal Article
Zukal, Arnošt - Shamzhy, Mariya - Kubů, Martin - Čejka, Jiří
The effect of pore size dimensions in isoreticular zeolites on carbon dioxide adsorption heats.
Journal of CO2 Utilization. Roč. 24, MAR2018 (2018), s. 157-163. ISSN 2212-9820. E-ISSN 2212-9839
R&D Projects: GA ČR GBP106/12/G015
EU Projects: European Commission(XE) 640979 - ShaleXenvironmenT
Institutional support: RVO:61388955
Keywords : UTL zeolite * IPC-n zeolites * Carbon dioxide adsorption
OECD category: Physical chemistry
Impact factor: 5.189, year: 2018

Adsorption isotherms of carbon dioxide were measured on a family of IPC-2, IPC-4, IPC-6, and IPC-7 siliceous isoreticular zeolites prepared from UTL germanosilicate. New strategy called ADOR allowed to synthesize isoreticular materials having the same structure of individual layers but gradually reduced channel size of 9.5 × 7.1 (14-ring), 8.5 × 5.5 (12-ring), 6.6 × 6.2 (12-ring), 5.4 × 5.3 (10-ring) and 4.5 × 3.6 (8-ring) Å. These IPC-n zeolites present an excellent set of siliceous model materials to analyze the effect of micropore structure on adsorption of carbon dioxide. Isosteric adsorption heats of carbon dioxide were determined from adsorption isotherms measured in the range 273 K–333 K up to 101 kPa. Obtained dependences of the adsorption heat of CO2 on the amount adsorbed are more sensitive to the adsorbent structure than single adsorption isotherms. It appears that due to domination of dispersion interactions of carbon dioxide with zeolites under study isosteric adsorption heat characterizes the structure features of investigated zeolites with a higher resolution then adsorption isotherms.
Permanent Link: http://hdl.handle.net/11104/0279339