CO2 Separation from Syngas by Multiwall Carbon Nanotube

In this study the equilibrium uptakes of hydrogen and carbon dioxid as the main constituents of syngas by the multi-walled carbon nanotube (mwcnt) were investigated at the temperature range of 288-318 k and pressure up to 40 bars. the results have shown that temperature had much less effect on the adsorption of h2 on mwcnt than adsorption of co . several model isotherms such as langmuir and freundlich were2 examined to fit the equilibrium uptake data. the kinetics of h and co adsorption on mwcnt were also 2 2 investigated and the results revealed a fast sorption kinetic for both gas adsorption on mwcnt. isosteric heat of adsorption was evaluated based on the clausius-clapeyron equation at different temperatures. small values of isosteric heat of adsorption confirmed that although the adsorption of h and co on mwcnt were 2 2 exothermic, but the heat of adsorption was too low, therefore the process of adsorption of both gases on the mwcnt used in this study is physisorption.