11.超臨界流体による石炭液化・抽出の速度論的解析

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This paper describes the kinetics of thermal decomposition of coal during supercritical fluid(SCF) coal extraction at 653K and 20MPa. Effects of particle size of coal and solvent flow rate on coal conversion and liquid yield were intensively investigated. Both conversion and liquid yield increased with reducing particle size, while volatile yield was almost the same. This is due to the rapid extraction of primary products from coal particles, which inhibited its recombination or polymerization (charization). The result suggests that the time constant of charization of the primary products was around 10s and the amount of such primary products was around 15wt% under this condition. With increasing flow rate, liquid yield increased and volatile yield decreased, while conversion remained constant. This result can be explained by the secondary decomposition of primary products. The amount of species which is easy to decompose with a reaction time of 100s was around 10wt%.
一般社団法人日本エネルギー学会の論文
1992-11-05