Desorbing Test on Trace Contaminants for the Japanese Closed Ecology Experiment Facilities (CEEF)

In the closed environments, removal of trace contaminants generated from persons, animals, and plants is important function to keep the environment below the allowable level. We conducted the fundamental tests in order to confirm design of TCCA (Trace Contaminants Control Assembly) for Closed Ecology Experiment Facilities (CEEF), and obtained the following results;

1. 1)
   The palladium-on-alumina catalyst is suitable for CO, CH₄, C₂H₄ conversion at temperature lower than 400°C.
2. 2)
   The alkali impregnated AC (activated charcoal) is effective for NO₂, SO₂ removal and prevents catalyst poisoning from SO₂.
3. 3)
   The active-desorbing conducted by hot air blow-throw an AC is effective for C₂H₅OH, CH₂Cl₂ desorbing.

We discuss the fundamental test and design conditions for TCCA.