3446.    TROPSCH, H.  [Synthesis and Decomposition of Formates.]  Ann. chim. phys., vol. 15, No. 9, 1921, pp. 42-60.

        Investigation of CaO as a catalyst for reactions in water gas mixtures was extended, and a study was made of the synthesis and decomposition of formates.  As regards the mechanism of CH4 synthesis, it is assumed that at temperatures below the decomposition of CaCO3 (900°) water gas reacts with CaO to give calcium formate.  CaO+2 CO+H2O=Ca(CHO2)2.  The formate in the presence of an excess of lime then reacts to give CH4 and CaCO3.  2 Ca(CHO2)2+CaO=3 CaCO3+CH4.