2959.     ---------------.  [RUHRCHEMIE, A.-G.]  [Carbon Dioxide in the Circulation Gas of Catalytic Reduction.]  FIAT Reel K-28, July 7, 1938, frames 6,435-6,452B; PB 70,185; TOM Reel 295.

I        n a new catalytic reduction installation for the production of Fischer-Tropsch catalyst, the % of CO₂ in the reduction gas was examined during the reduction period.  The CO₂, which originates mainly from the decomposition of the carbonates, attains its highest concentration after the first third of the reaction time.  An apparatus for further formation of CH₄ converts only part of the liberated CO₂.  A reaction on the already reduced catalyst thus results and leads to a loss of activity at reduction temperatures.  14 tables and graphs.