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This paper describes the design specification of the Vapor Phase Catalytic Ammonia Removal process, the relative benefits of its utilization in space flight, and the design modification which will be required to ensure its proper operation in reduced gravity. In addition, the results of an experimental evaluation of the processors are also presented. The processors performance is presented in terms of product water purity, water recovery rates, and power.

A system analysis of sources and sinks for nitrogen diluent in a closed spacecraft environment has been carried out. Methods of transporting nitrogen, free or chemically bound, into orbit and the fate of nitrogen in spacecraft wastes has been carried out. The data indicates that in a closed CELSS environment, transportation of plant nutrients and reduction of waste material to nitrogen has many advantages from a process and penalty perspective.