No abstract

No abstract

To design or simulate air separation by a pressure swing adsorption process (PSA), adsorption equilibrium data in the range of temperatures used in this kind of process are needed. Acquisition of coadsorption equilibrium data is time-consuming, and then a binary model based on pure substance isotherm measurements is usually used to simulate equilibrium in PSA. In this paper, adsorption equilibrium data for nitrogen and oxygen on five faujasite zeolites (NaX, NaLSX, KLSX, and two LiLSX) were obtained at (288, 303, and 318) K and at pressures up to 3000 kPa. Coadsorption equilibria of nitrogen and oxygen mixtures were measured at 400 kPa with an original volumetric apparatus which is able to keep a constant pressure in the measurement cell. The measurements were compared to isotherms calculated by an extended Langmuir-Freundlich model. The influence of compensation cation on the adsorption capacities and selectivities was also analyzed.

No abstract