Abstract
The decomposed gases of phenol-formaldehyde retin (1), 3-methyl-phenol-formaldehyde resin (2) and 3, 5-dimethyl-formaldehyde resin (3) with a brown coal (Tempoku coal), during their heat treatment up to 1, 600°C, were analysed gaschromatographically.(1) has a maximum of production rate at 720°C for hydrogen, 600°C for methane and carbon monoxide, and 520°C for water.
As a number of methyl groups of resins increases, the maximum point of methane production shifts to the lower temperature side and its quantity also increases. Similar phenomenon is seen in the case of water. Hydrogen and carbon monoxide do not change their maximum production temperature for all resins, but their quantity reduces with the increase of methyl groupes.
A mechanism of carbonization reaction was proposed on a ground of chain reaction.
Brown coal shows similar phenomena except relatively large quantity of carbon dioxide, and two maxima of carbon monoxide. The basical decomposition reaction and its structure may be similae as that of phenol resins, especially as (1). The activationenergy of each gases were calculated and they gave nearly same values for the same kind of gases, namely 22.9 and 34.8kcal/mol for methane, 7.3, 17.4 and 36.6 kcal/mol for H2O, 13.7 and 36.6 kcal/mol for carbon monoxide, and 32.9 kcal/mol for hydrogen.
