すすおよびPAHの生成に関する平衡論的考察

概要

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To explore the formation of polycyclic aromatic hydrocarbons (PAH) and soot during combustion, equilibrium compositions of fuel-rich mixtures at elevated temperatures have been obtained based on thermodynamic considerations. In the calculations, only gaseous intermediates have been included, while solid carbon has been excluded on the assumption that the formation of carbon particles is much slower than other species. It has been shown that major intermediates before sooting are PAH and acetylene. At atmospheric pressure, a maximum PAH concentration appears at about 1400 K, while the acetylene concentration increase with temperatures above 1200 K. A comparison with the experimental results of a heated flow reactor suggests that the present prediction explains the formation of SOF and dry soot during thermal decomposition. Further, a discussion is given of the effects of the C/H ratio and enthalpy of fuel formation on PAH and soot.
社団法人日本機械学会の論文
1986-04-25