Abstract
Abstract The time-dependent transmission of 100 ppm acetylene in helium at 1 atm through columns of Columbia 4LXC 12/28 activated carbon at 25°C was measured at several flow rates in the range from about 1 to 7 cm3/s. Transmission is the gas-phase concentration at the column outlet divided by the input concentration. The gas-and adsorbed-phase diffusion coefficients were calculated from a homogeneous-solid diffusion model by means of the method of moments. The gas-phase diffusion coefficient was constant in this range of flow rates. Fitting the experimental transmission curves to a theoretical transmission expression for a model with only gas-phase diffusion indicated that solid-phase diffusion in this carbon cannot be neglected at high flow rates.
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