Chemical Reaction Kinetics of Diesel Fuel Blended with Esters of Long/Short Carbon Chain

MEI Deqing; ZHANG Chuanfang; YU Qisong; QI Jiawei; YU Yue

doi:10.3969/j.issn.1001-2222.2022.03.003

Vehicle Engine ›› 2022, Vol. 0 ›› Issue (3) : 15-22. DOI: 10.3969/j.issn.1001-2222.2022.03.003

Chemical Reaction Kinetics of Diesel Fuel Blended with Esters of Long/Short Carbon Chain

MEI Deqing¹,ZHANG Chuanfang¹,YU Qisong²,QI Jiawei¹,YU Yue¹

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Abstract

To compare and investigate the effect of cross-reaction on the low and high temperature oxidation of DMC-diesel and biodiesel-diesel blends, the variations of important component concentrations and reaction pathways were separately calculated by using a constantvolume homogeneous reactor. The n-heptane mechanism in Converge software was employed to substitute diesel, which contained 42 components and 168 element reactions. The changes of important component concentrations and reaction pathways in D10 (mixed with 10% mass fraction DMC in diesel), D50 (mixed with 50% mass fraction DMC in diesel), B10 (mixed with 10% mass fraction biodiesel in diesel) and B50 (mixed with 50% mass fraction biodiesel in diesel) were investigated using a constantvolume homogeneous reactor, and the cross-reaction flows of OH in their combustion reaction systems were analyzed separately at 900 K, 4.3 MPa and 1 350 K, 6 MPa with the same equivalence ratio of 1. The analysis results showed that the OH production of D10 increased and promoted the reaction, the OH production of D50 decreased and weakened the reaction, and the activity of B50 was greater than that of B10 in both conditions. The reaction pathway of CH₂O＝HCO＝CO played an important role in the crossreaction of blended fuels according to the results of crossreaction flow.

Key words

cross reaction；dimethyl carbonate (DMC) / biodiesel / reaction mechanism

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MEI Deqing,ZHANG Chuanfang,YU Qisong,QI Jiawei,YU Yue. Chemical Reaction Kinetics of Diesel Fuel Blended with Esters of Long/Short Carbon Chain[J]. Vehicle Engine. 2022, 0(3): 15-22 https://doi.org/10.3969/j.issn.1001-2222.2022.03.003