Thermal decempesition of Na, Mg, K, Ca, Mn, Co, Ni, Cu, Zn, Sr, Cd, Ba and Pb formates were investigated by use of gas chromatography and thermogravimetry.
(1) Upon the decompositions of Na, Mg, K, Ca, Mn, Zn, Sr, Cd and Ba fermates, H2, CO and CO2 were formed as the main gaseous products, together with small amounts of CH4, HCHO, HCOOCH3 and CH30H. These organic compounds were formed by secondary reactions from the othetgaseous products under the catalytic actions of the solid products (carbonates or oxides), (2) The deconipositions of Co, Ni, Cu and Pb formates proceeded through main proCess (a)and side process (b).
The molar ratio of MO te M in the products was highest in the case of the decompqsition of Co formate and was about 50%. ln the case of Pb formatei, two kihds of weak catalytic action of solid products were observed, i. e. Pb metal produced autocatalyzed the decomPosition reacti n itself, but, PbO catalyzed the formation of organic compounds except for CH4. How- ever in the other cases, the autocatalysis of metal was pred minantly observed.
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