MOF-74 building unit has a direct impact on toxic gas adsorption

Metal organic framework (MOF-74) analogs have been synthesized using cobalt, magnesium, nickel, and zinc metal centers. The capability of these materials to remove ammonia, cyanogen chloride, and sulfur dioxide from air has been evaluated via fixed-bed breakthrough testing in both dry and humid conditions. Octane breakthrough tests were performed to determine the physisorption capacities of the materials. All materials were stored in air prior to use. Dynamic breakthrough capacities of the analogs were compared to 13X zeolite and BPL activated carbon. The impact of the metal center on the adsorption behavior is illustrated with each analog providing different ammonia and cyanogen chloride adsorption capacities. The results provide an important step in the assessment of the potential of MOFs to function as porous adsorbent materials.