抄録
Soot and polycyclic aromatic hydrocarbons (PAH) are main pollutants as well as NOx in combustion process. In this paper, recent advances in the understanding of the formation mechanisms of PAH and the subsequent growth by chemical reactions with radical and stable species are reviewed. In the growth processes of PAH, hydrogen abstraction-C2H2 addition (HACA) mechanism and recently-proposed phenyl addition-cyclization (PAC) mechanism are discussed. A combination of PAC mechanism with HACA mechanism is important in the production and growth to large PAH. Particle inception, surface growth, coagulation and aggregation processes of soot are also briefly reviewed.
