Analytic solution for adsorber breakthrough curves with bidisperse sorbents (zeolites)

摘要: A time-domain solution in the form of infinite series for break-through curves is derived zeolite adsorbers. Three diffusion steps are accounted solution: external film, macropore, and micropore. The based on assumption that concentration profiles micropores macropores both parabolic. Based analytic solution, a simple criterion given relative importance three individual mass transfer resistances. adsorber behavior determined by four independent dimensionless parameters. For commercial sorbents, bed dominated two parameters: Henry's law constant (K) parameter M2, which product stoichiometric time (L/v) macropore (Dp/Ro2). The good agreement with experimental data breakthrough nitrogen methane carried helium 5A beds. When reduced to monodisperse pores, also Rosen's exact solution.