Abstract： With three EGR rates of 0, 10％ and 20％, the characteristics of exhaust particles with butanol／diesel blend of B10 in diesel engine were investigated by thermogravimetric test. The effect of EGR rate on the pyrolysis and combustion characteristics of particles were discussed. The variation characteristics of ignition temperature, burnout temperature component percentage were also analyzed. The activation energy of oxidation reaction of the soot in particles was calculated based on CoatsRedfern non isothermal method with different EGR rates. The results show that with the increasing of EGR rate, the ignition temperature of particles is decreased with increased burnout temperature， and the volatile particles in percentage are decreased with gradually increased volatile components with high boiling point and fixed carbon particle fractions. Compared with B10 particles, the percentage of fixed carbon particles in B10EGR20％ particles is increased by 23.6％, and the activation energy of particles is decreased gradually. Compared with B10 particles, the activation energy of B10EGR10％ and B10EGR20％ particles are reduced by 0.9 kJ·mol-1 and 1.7 kJ·mol-1, respectively.
2017, Vol. 38 
