Adsorption Capacities of Ammonia‐Activated Carbon Pairs in a Single‐Bed Adsorption Cooling System

In this study, the adsorption capacities of activated charcoal‐ammonia working pairs at room temperature, at which waste heat is supplied, were studied in a tube‐in‐tube adsorption bed in the pressure range of 0.4–10 bar. A double‐pipe adsorption bed was designed, constructed, and utilized for sequential adsorption and desorption of ammonia at 27 °C. Three types of granular activated carbons (GACs) with different particle size distributions were used as adsorbents. Experimental observations showed that the highest adsorption capacity for ammonia was shown by GAC‐2 with broader particle size distribution. The adsorption behaviors of all three adsorbents closely followed the Langmuir model under the operating conditions used in the study. A single‐bed adsorption cooling system was developed to investigate the adsorption characteristics of ammonia onto three highly porous granular activated carbons (GACs) with different particle size distributions. The Langmuir adsorption isotherm model was utilized in its simplest form to determine the values of the parameters and predict the adsorption behavior of ammonia on the selected adsorbents.