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Effects of EGR rates on combustion and emission characteristics in a diesel engine with n-butanol/PODE3-4/diesel blends

Lookup NU author(s): Dr Yaodong WangORCiD



This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).


An experimental investigation is conducted on the influence of EGR (Exhaust Gas Recirculation) rates (0–40%)on the combustion and emission characteristics of n-butanol/diesel/PODE3-4 blends at low-temperature combustionmode in diesel engine. The results show that at identical EGR rate, compared to D100 (diesel fuel), thepeak values both of the mean cylinder pressure and the heat release rate of BD20 (20% butanol and 80% diesel involume) are increased, ignition delay is extended, and the brake thermal efficiency is enhanced. ConcerningBD20 blended with PODE3-4, the ignition delay is shortened, while both the brake thermal efficiency and thecombustion efficiency increase. At the EGR rate below 30%, as the EGR rate grows, the effects on emission ofsoot, CO and HC are not significant, while the emission of NOx is sharply reduced; when the EGR rate is above30%, as it grows, the emissions of soot, CO, and HC drastically rise. As EGR rate grows, the total particulatematter (PM) number concentrations of four fuels firstly decline and then rise, the total PM mass concentrationskeep stable firstly and then rise drastically. As the proportion of added PODE3-4 in BD20 grows, the particlegeometric mean diameters further decrease.

Publication metadata

Author(s): Huang HZ, Li ZJ, Teng WW, Huang R, Liu QS, Wang YD

Publication type: Article

Publication status: Published

Journal: Applied Thermal Engineering

Year: 2019

Volume: 146

Pages: 212-222

Print publication date: 05/01/2019

Online publication date: 28/09/2018

Acceptance date: 27/09/2018

Date deposited: 12/10/2018

ISSN (print): 1359-4311

ISSN (electronic): 1873-5606

Publisher: Elsevier


DOI: 10.1016/j.applthermaleng.2018.09.126


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