Designing a simple volumetric apparatus for measuring gas adsorption equilibria and kinetics of sorption. Application and validation for CO2, CH4 and N2 adsorption in binder-free beads of 4A zeolite

The screening of adsorbents (zeolites, MOFs, ACs, etc) requires the measurement adsorption equilibria and kinetics at milligram scale. In this regard, a volumetric apparatus (constant volume variable pressure – batch adsorber) has been developed for studying sorption. Its validation was accomplished by carbon dioxide (CO2), methane (CH4) nitrogen (N2) sorption CO2 on commercial binder-free 4A zeolite. data collected an acceptable agreement with already published values gravimetric breakthrough flow technique. isotherms were modeled using Sips model from low till 8 bar 303, 343 373 K. measured uptake rate experiments fitted solid-film linear-driving-force (LDF). It observed that LDF mass transfer coefficients increase temperature. Finally, statistical analysis performed Response Surface Methodology (RSM) to determine interactions among process variables such as temperature in respective gas data.