Construction and simulation of nbutanol／diesel PAHs simplified mechanism
1. School of Automotive and Traffic Engineering, Jiangsu University, Zhenjiang, Jiangsu 212013, China; 2. Wuxi Institute of Technology, Wuxi, Jiangsu 214121, China
Abstract：To explore the formation pathway of nbutanol/diesel soot, the processes of nbutanol oxidation and PAHs of benzene, naphthalene, phenanthrene and pyrene were analyzed, and the basic reaction related to PAHs formation of nbutanol/diesel mixed fuel was retained. The oxidation mechanism of nbutanol and the PAHs mechanism were simplified, and the simplification mechanism of nheptane was added to establish the simplification mechanism of nbutanol/diesel PAHs with 73 components and 89 elements. The simplified mechanism was used to simulate the reaction parameters of nbutanol/diesel, and the feasibility of the simplified mechanism was verified. Based on the simulation results, the PAHs generation of nbutanol/diesel and the change rule of yield rate with time were analyzed. The results show that the simulation results are consistent with the experimental results of reflected shock tube. With the increasing of nbutanol blending ratio, the PAHs yield and the generation rate are decreased, and the peak time is postponed with decreased total yield. With the increasing of equivalence ratio, the peak time of PAHs matter is increased, while the peak time is delayed.
2017, Vol. 38 
