The oscillatory behavior during CO oxidn. over Pd supported on glass fibers was studied in a recycle reactor. The properties of oscillations as a function of temp. and inlet CO concn. were investigated in detail. The peculiarity of the obsd. oscillations is their long period up to 6 h. Math. model considering oxidn.-redn. processes of the Pd was developed to describe the exptl. results. The model accounts for the obsd. reaction rate dependence on the CO inlet concn., the region of oscillations and the dependence of the oscillatory behavior upon temp. and CO inlet concn. [on SciFinder (R)]