Study on the NOx emissions mechanism of an HICE under high load

Junfa Duan; Fushui liu; Zhenzhong Yang; Baigang Sun; Weichang Chen; Lijun Wang

doi:10.1016/j.ijhydene.2017.07.048

Study on the NOx emissions mechanism of an HICE under high load

Junfa Duan^*, Fushui liu, Zhenzhong Yang, Baigang Sun, Weichang Chen, Lijun Wang

^*Corresponding author for this work

School of Mechanical Engineering

Research output: Contribution to journal › Article › peer-review

47 Citations (Scopus)

Abstract

A hydrogen fueled internal combustion engine (HICE) CFD simulation model consisting of detailed chemical reaction mechanisms was built using CONVERGE to study the NOx formation mechanisms. The Simulation Results are consistent with the experiments we had reported. The Simulation results show that the temperature inside the flame front and the OH concentration in the flame front increased with the fuel-air equivalence ratio. NO, as the major component of NOx, was generated abundantly during the rapid combustion period with the temperature rising and decreased after the rapid combustion period to a stable amount when the temperature dropped below 2200 K in cylinder. NO was generated mainly through three route named as thermal NO, NNH and N₂O. The Thermal NO path contributed a large proportion of the total NO emissions and the contribution increased with the fuel-air equivalence. NNH and N₂O routecontributed 24.2% of the total NO emissions when the fuel-air equivalence was 0.6, but contributed −23.9% when the fuel-air equivalence was 1.0.

Original language	English
Pages (from-to)	22027-22035
Number of pages	9
Journal	International Journal of Hydrogen Energy
Volume	42
Issue number	34
DOIs	https://doi.org/10.1016/j.ijhydene.2017.07.048
Publication status	Published - 24 Aug 2017

Keywords

Contribution ratio
Hydrogen fueled internal combustion engine (HICE)
NNH route
NO route
NOx emissions
Thermal NO route

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1016/j.ijhydene.2017.07.048

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Duan, J., liu, F., Yang, Z., Sun, B., Chen, W., & Wang, L. (2017). Study on the NOx emissions mechanism of an HICE under high load. International Journal of Hydrogen Energy, 42(34), 22027-22035. https://doi.org/10.1016/j.ijhydene.2017.07.048

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title = "Study on the NOx emissions mechanism of an HICE under high load",

abstract = "A hydrogen fueled internal combustion engine (HICE) CFD simulation model consisting of detailed chemical reaction mechanisms was built using CONVERGE to study the NOx formation mechanisms. The Simulation Results are consistent with the experiments we had reported. The Simulation results show that the temperature inside the flame front and the OH concentration in the flame front increased with the fuel-air equivalence ratio. NO, as the major component of NOx, was generated abundantly during the rapid combustion period with the temperature rising and decreased after the rapid combustion period to a stable amount when the temperature dropped below 2200 K in cylinder. NO was generated mainly through three route named as thermal NO, NNH and N2O. The Thermal NO path contributed a large proportion of the total NO emissions and the contribution increased with the fuel-air equivalence. NNH and N2O routecontributed 24.2% of the total NO emissions when the fuel-air equivalence was 0.6, but contributed −23.9% when the fuel-air equivalence was 1.0.",

keywords = "Contribution ratio, Hydrogen fueled internal combustion engine (HICE), NNH route, NO route, NOx emissions, Thermal NO route",

author = "Junfa Duan and Fushui liu and Zhenzhong Yang and Baigang Sun and Weichang Chen and Lijun Wang",

note = "Publisher Copyright: {\textcopyright} 2017 Hydrogen Energy Publications LLC",

year = "2017",

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doi = "10.1016/j.ijhydene.2017.07.048",

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AU - Duan, Junfa

AU - liu, Fushui

AU - Yang, Zhenzhong

AU - Sun, Baigang

AU - Chen, Weichang

AU - Wang, Lijun

PY - 2017/8/24

Y1 - 2017/8/24

N2 - A hydrogen fueled internal combustion engine (HICE) CFD simulation model consisting of detailed chemical reaction mechanisms was built using CONVERGE to study the NOx formation mechanisms. The Simulation Results are consistent with the experiments we had reported. The Simulation results show that the temperature inside the flame front and the OH concentration in the flame front increased with the fuel-air equivalence ratio. NO, as the major component of NOx, was generated abundantly during the rapid combustion period with the temperature rising and decreased after the rapid combustion period to a stable amount when the temperature dropped below 2200 K in cylinder. NO was generated mainly through three route named as thermal NO, NNH and N2O. The Thermal NO path contributed a large proportion of the total NO emissions and the contribution increased with the fuel-air equivalence. NNH and N2O routecontributed 24.2% of the total NO emissions when the fuel-air equivalence was 0.6, but contributed −23.9% when the fuel-air equivalence was 1.0.

AB - A hydrogen fueled internal combustion engine (HICE) CFD simulation model consisting of detailed chemical reaction mechanisms was built using CONVERGE to study the NOx formation mechanisms. The Simulation Results are consistent with the experiments we had reported. The Simulation results show that the temperature inside the flame front and the OH concentration in the flame front increased with the fuel-air equivalence ratio. NO, as the major component of NOx, was generated abundantly during the rapid combustion period with the temperature rising and decreased after the rapid combustion period to a stable amount when the temperature dropped below 2200 K in cylinder. NO was generated mainly through three route named as thermal NO, NNH and N2O. The Thermal NO path contributed a large proportion of the total NO emissions and the contribution increased with the fuel-air equivalence. NNH and N2O routecontributed 24.2% of the total NO emissions when the fuel-air equivalence was 0.6, but contributed −23.9% when the fuel-air equivalence was 1.0.

KW - Contribution ratio

KW - Hydrogen fueled internal combustion engine (HICE)

KW - NNH route

KW - NO route

KW - NOx emissions

KW - Thermal NO route

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DO - 10.1016/j.ijhydene.2017.07.048

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SN - 0360-3199

VL - 42

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JO - International Journal of Hydrogen Energy

JF - International Journal of Hydrogen Energy

IS - 34

ER -

Study on the NOx emissions mechanism of an HICE under high load

Abstract

Keywords

UN SDGs

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