Natural gas HCCI engine operation with exhaust gas fuel reforming

Yap, D.; Peucheret, S.; Megaritis, A.; Wyszyński, Miroslaw L.; Xu, Hongming

doi:10.1016/j.ijhydene.2005.06.002

Cited by 98 publications

(33 citation statements)

References 18 publications

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“…Besides, catalyst deactivation caused by sulphur content in natural gas would also be a challenge for onboard fuel reforming [24,25]. To avoid these disadvantages, in-cylinder fuel reforming which involves reforming fuel using fuel rich combustion was proposed and conducted by a series of researchers.…”

Section: Introductionmentioning

confidence: 99%

Effects of H2 and CO enrichment on the combustion, emission and performance characteristics of spark ignition natural gas engine

Gao

Zhu

et al. 2016

Fuel

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h i g h l i g h t sCO is less effective than H 2 in improving engine combustion and thermal efficiency. Both CO and H 2 smoothes engine operation and lowers THC emission. CO is less effective in improving the laminar flame speed of CH 4 than H 2 . a b s t r a c tFuel reforming is an attractive way for improving the performances of internal combustion engine. The primary components of the reformed gas are H 2 , CO, CO 2 and N 2 . A detailed knowledge of each component in reformed gas is essential for judging or making better use of the reformed gas as well as reforming technologies. In this paper, the influences of the major combustibles of the reformed gas, H 2 and CO, on the performances of a lean burn spark ignition natural gas engine are investigated. Results indicate that addition of H 2 and CO could improve in-cylinder combustion, smooth engine operation and increase engine thermal efficiency. With the addition of H 2 and CO, both the peaks of in-cylinder pressure and heat release rate increase, flame development duration and rapid combustion duration as well as CovIMEP decrease. However, CO is less effective compared with H 2 . The influence of H 2 on engine THC emission is insignificant while addition of CO tends to increase engine CO emission remarkably owing to the quenching and crevice effect. Both H 2 and CO tend to worsen engine NO x emission due to the increased in-cylinder temperature while the effect of H 2 is more distinct. The simulation of laminar flame speed manifests that addition of H 2 and CO increase O, H and OH radical concentration and hence improve the flame propagation and the combustion process, resulting in improved laminar flame speed of the fuel-air mixtures. In compare, H 2 addition leads to higher laminar flame speed than CO addition does. The whole investigation of this paper implies that both H 2 and CO in the reformed gas are effective in improving engine combustion and effective thermal efficiency while H 2 is more effective.

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Section: Introductionmentioning

confidence: 99%

Effects of H2 and CO enrichment on the combustion, emission and performance characteristics of spark ignition natural gas engine

Gao

Zhu

et al. 2016

Fuel

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show abstract

“…The ability to be used in any engine configuration: automobile engines, stationary engines, heavy duty engines or small engines [25,35,36]. On the other hand, HCCI engines have some disadvantages such as high levels of unburned hydrocarbons (UHC) and carbon monoxide (CO) [29,38,39]. Knocking also occurs under certain operating conditions and reduces the operating range of the engine [29,38,[40][41][42].…”

Section: Homogeneous Charge Compression Ignition Enginesmentioning

confidence: 99%

An Introduction to a Homogeneous Charge Compression Ignition Engine

Hairuddin

Wandel²,

Yusaf³

2014

J MECH ENG SCI

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“…Megaritis et al [16] studied the effects of exhaust gas fuel reforming on natural gas-fueled (NG) HCCI engine. The results of their study indicated that with the increase in pure hydrogen, the combustion onset was advanced.…”

Section: Introductionmentioning

confidence: 99%