Effect of hydrogen addition on combustion, performance and emission of stoichiometric compressed natural gas fueled internal combustion engine along with exhaust gas recirculation at low, half and high load conditions

Rao, Anas; Wu, Ziru; Mehra, Roopesh Kumar; Duan, Hao; Ma, Fenglong

doi:10.1016/j.fuel.2021.121358

Cited by 33 publications

(7 citation statements)

References 38 publications

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“…Although there have been reports on the effects of hydrogen combustion in a premixed burner [19][20][21][22] and on the effects of exhaust gas recirculation in hydrogen engines [23][24][25], there have been no studies on the NO formation characteristics of non-premixed hydrogen combustion in an industrial furnace and the effects of exhaust gas recirculation have not yet been studied. Since hydrogen has a very high laminar burning velocity, abnormal combustion such as knocking in gas engines and backfiring in premixed burners such as boilers is a problem [24].…”

Section: Introductionmentioning

confidence: 99%

Fundamental Study on Hydrogen Low-NOx Combustion Using Exhaust Gas Self-Recirculation

2022

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Hydrogen is expected to be a next-generation energy source that does not emit carbon dioxide, but when used as a fuel, the issue is the increase in the amount of NOx that is caused by the increase in flame temperature. In this study, we experimentally investigated NOx emissions rate when hydrogen was burned in a hydrocarbon gas burner, which is used in a wide temperature range. As a result of the experiments, the amount of NOx when burning hydrogen in a nozzle mixed burner was twice as high as when burning city gas. However, by increasing the flow velocity of the combustion air, the amount of NOx could be reduced. In addition, by reducing the number of combustion air nozzles rather than decreasing the diameter of the air nozzles, a larger recirculation flow could be formed into the furnace, and the amount of NOx could be reduced by up to 51%. Furthermore, the amount of exhaust gas recirculation was estimated from the reduction rate of NOx, and the validity was confirmed by the relationship between adiabatic flame temperature and NOx calculated from the equilibrium calculation by chemical kinetics simulator software.

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Section: Introductionmentioning

confidence: 99%

Fundamental Study on Hydrogen Low-NOx Combustion Using Exhaust Gas Self-Recirculation

2022

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“…The harmful exhaust emissions from road transport cars in particular gasoline and diesel engines are a serious health and environmental concern. 1 The development of a finer alternative and cleaner fuels with greater performances is currently being investigated by the researchers throughout examinations on the control of the undesirable emissions such as HC, CO, NOx, and PM. 2,3 Compressed Natural Gas (CNG) is one of the cleanest fuels that can also run-on gasoline engines, although the drawback is its slow burning speed specially on small engines 4 whereas the previous investigations have shown the addition of hydrogen to CNG fuel has enhanced the engine performance, brake thermal efficiency, brake specific fuel consumption reduction, and exhaust emissions reduction due to its very fast burning velocity and its other capacities.…”

Section: Introductionmentioning

confidence: 99%

“…5,11–15 Nowadays, researchers consider the replacement of port injection (PI) engines by direct-injection (DI) types an ideal technique to improve the engine efficiency, as it improves the engine performance and decreases the volume of exhaust gasses in addition to decreasing the fuel consumption. 16–19…”

Section: Introductionmentioning

confidence: 99%

The effects of variable excess air ratio and ignition timing on the performance and exhaust emissions in a direct injection Hydrogen-CNG fueled engine

Zareei

Ghadamkheir

2022

International Journal of Engine Research

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This study investigates a direct injection (DI) engine fueled with compressed natural gas (CNG) enrichment with hydrogen blend (HCNG) in counter from the conversion of the port injection gasoline engine. The intention of the investigation was to examine the performance and exhaust gases from the effect of excess air ratio and timing angle changes in consequence of hydrogen increment to natural gas in comparison to gasoline engine performance and exhaust gases as a single fuel. The compression ratio was set at 14:1 with varying load at 3000 rpm, and the ignition timing was applied at −17, −19, −21, and −34°bTDC at WOT, and the amount of hydrogen enrichment to natural gas was applied at 10%, 20%, 30%, and 40%. The conditions on torque, power, heat release rate, brake specific fuel consumption, CO, and NOx were studied. Results showed that the power and torque increased by 8% with increasing the hydrogen content to 40% in fuel composition and advancing ignition timing and heat release rate as well as decreasing λ from 1.4 to 1.2 relative to the stoichiometric state. Also, the specific fuel consumption decreased by 18.5% in the optimal condition.

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“…Many countries used CNG as the main fuel for internal combustion engines and this led to low No, HC, and CO emissions. Also, (Ah and V, 2019) [2] studied the use of compressed natural gas as a fuel for internal combustion engines on both motor transport and agricultural machinery. Results of tests taken from other researchers.…”

Section: Introductionmentioning

confidence: 99%

“…The results are that the smaller H2/EGR ratio ( HCNG50&EGR = 10%) is good for low load conditions and medium H2/EGR ratio ( HCNG50&EGR = 14%) is good for half load conditions and the high H2/ EGR ratio ( HCNG50&EGR = 26% ) is good for high load conditions. (Rao et al, 2021) [4].…”

Section: Introductionmentioning

confidence: 99%

A Review of Using Natural Gas in Internal Combustion Engines

Hamed¹

2022

IJRMEE

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Due to its increasing emissions from combustion of fuels in the internal combustion engines and increasing world concern on global warming problem. It’s a significant issue to use alternative fuels that would be safe for people and the environment. In this article, the previous research's concern on using natural gas is discussed. This research presents the precious studies on the benefits of using natural gas fuel in spark ignition, diesel, and agricultural engines. In addition to modeling focusing on engine parts loads to identify fuel-burning influence. Also presents a former discipline on using hydrogen enrichment to improve fuel efficiency and shows characteristics of using dual fuel in internal combustion engines. The difference between lean combustion and exhaust gas recirculation strategies and produces a comparison between natural gas/methanol and natural gas/gasoline in a dual-fuel engine are reviewed. In addition the comparative study between gasoline and natural gas with a direct injection strategy is presented. Also, this article focus on using natural gas as a fuel with reactive controlled compression ignition (RCCI). It can concluded that using the natural gas fuel is one of the perfect solutions to reduce hydrocarbons emissions and increase the thermal efficiency of fuel combustion and reduce the cost of energy production.

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Effect of hydrogen addition on combustion, performance and emission of stoichiometric compressed natural gas fueled internal combustion engine along with exhaust gas recirculation at low, half and high load conditions

Cited by 33 publications

References 38 publications

Fundamental Study on Hydrogen Low-NOx Combustion Using Exhaust Gas Self-Recirculation

Fundamental Study on Hydrogen Low-NOx Combustion Using Exhaust Gas Self-Recirculation

The effects of variable excess air ratio and ignition timing on the performance and exhaust emissions in a direct injection Hydrogen-CNG fueled engine

A Review of Using Natural Gas in Internal Combustion Engines

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