DME拡散火炎とメタン部分予混合火炎のすす生成特性の比較

抄録

Experimental study of soot formation in DME jet diffusion flame was performed to investigate the influence of the oxygen contained in the molecular structure of DME. The amount of soot in the flame was measured using the transmitted light attenuation method, and was compared with that of the partial premixing methane flame under the high temperature and various surrounding oxygen conditions. The results showed that the amount of soot in the DME diffusion flame is much less than that of methane flame in most conditions, and the partially premixied methane flame of φ=7 that is substantially equal in equivalent ratio with DME diffusion flame generated 3-10 times as much soot as DME. This result suggests that the suppression of soot formation in DME flame is not due to the decrease of substantial equivalent ratio with contained oxygen, but attributed to the molecular structure of DME. The volume of the methane that is generated by primary pyrolysis of DME might have considerable influence on the generated soot amount.