Composite adsorbents of CaCl2/ activated carbon were prepared by charring and activating at high temperature from CaCl2 and fir crumbs. Thermal conductivity was improved by adding expanded graphite into composite adsorbent. The proportion of expanded graphite in composite adsorbents was changed from 0% to 50%. The effect of the proportion of expanded graphite in composite adsorbents on the uptake and the adsorption rate was observed from ammonia adsorption experiment. It is found that the adsorption capacity of composite absorbent is decreasing all the time while the adsorption rate increasing at first but then decreasing with the increase of the proportion of expanded graphite. It is also found that thermal conductivity of the composite adsorbent is improving with the increase of the proportion of expanded graphite. When the proportion of expanded graphite in composite adsorbent is 30%

the composite adsorbent has the optimum performance for adsorption refrigeration—its thermal conductivity of the composite adsorbent is 0.193 W/(m?K) and its uptake is 0.431 g/g in first 15min of the adsorption time.