Pure and binary adsorption of carbon dioxide and nitrogen on AQSOA FAM Z02

Charithea Charalambous, Giulio Santori, Enrique Villarasa-Garcia, Moises Bastos-Neto, Celio Cavalcante, Stefano Brandani

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Adsorption equilibria of CO2, N2 and CO2/N2 binary system on AQSOA FAM Z02 grains were measured at a temperature range of 295 K to 348 K and over a wide range of pressure from 0.2 bar to 20 bar using a gravimetric method. CO2 and N2 single component experimental equilibrium measurements were regressed using the Toth equation. CO2 adsorption on AQSOA FAM Z02 reported higher loadings compared to N2 adsorption at all measured temperatures with an adsorption capacity of 6.1 mmol/g. Adsorption of CO2/N2 binary mixture at different gas phase compositions (0.15/0.85, 0.50/0.50 and 0.80/0.20 mole fraction) was studied. The experimental data were compared with the prediction of ideal adsorbed solution theory (IAST), which included also the non- idealities in the bulk-gas phase. The IAST model shows an agreement with the experimental data with < 4 % average relative error in the absolute adsorbed amount.
Original languageEnglish
JournalJournal of Chemical and Engineering Data
Early online date6 Feb 2018
Publication statusPublished - 2018


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