An experimental study of the adsorption performances of NH 3 on several commercial activated carbons was described. Firstly, the specific surface area, pore size distribution and morphological structure of the activated carbons have been characterized by N 2 adsorption, Scanning Electron Microscope (SEM), and X-ray diffraction (XRD). The adsorption capacities of four kinds of activated carbons were compared based on adsorption isotherms at 30 ℃ . Results show that a type of activated carbon MSC30 with high adsorption capacity of NH 3 is a promising adsorbent for NH 3 because of its large specific surface area and high pore volume. Secondly, the effect of adsorption temperature on the adsorption capacity of NH 3 on MSC30 was investigated. A modified Dubinin-Astakhov equation was employed to describe the adsorption isotherms, with the reliability and accuracy evaluation. The isosteric heat of adsorption of MSC30-NH 3 as a function of the amount adsorbed was calculated applying the Clausius-Clapeyron equation with isotherms obtained at 20 ℃ and 30 ℃ . Thirdly, a packed-bed type adsorber was used to evaluate the influence of cycle time on the system cooling performance (coefficient of performance, specific cooling performance, and volumetric cooling performance) of the MSC30-NH 3 pair at the evaporating temperatures of 5 ℃ , 10 ℃ and 15 ℃ with a fixed adsorption/condensing temperature and desorption temperature of 30 ?C and 80 ℃ , respectively. Finally, a long term operation without degradation for MSC30-NH 3 adsorption was experimentally demonstrated from the 80 consecutive adsorption-desorption cycles.
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