Sorbents for Removal of Cyanide Species from Gas Streams

This proposed Small Business Innovative Research (SBIR) Phase I addresses development of new materials and a process employing them for the continuous removal of cyanide species from air streams. Interest in removal of these species stems from the potential harm that they can render in malicious attacks on U.S. forces. Current approaches for removal of these species are based on activated carbon supported metal complexes, which lead to bulky filters and which must be disposed of as hazardous waste when fully discharged. Phase I will evaluate a number of materials for sorptive capacity (and regenerability) and catalytic low temperature oxidation activity towards cyanides. The proposed Phase I will address the development of these new materials and a process for their use in treatment of cyanide contaminated air. The process will permit air treatment without frequent sorbent changes, and will convert cyanide species into benign forms with minimal volumetric and power requirements. Phase I will consist of the preparation, characterization, and evaluation of a number of candidate materials for removal of cyanide species from air and identification of preferred conditions for their employment and regeneration. During Phase II, a prototype air purifier incorporating these materials will be designed, fabricated, and tested.