Study on the performance of premixed natural gas/ammonia engine with diesel ignition

Wang, Binbin; Wang, Hechun; Hu, Deng; Yang, Chuanlei; Duan, Baoyin; Wang, Yinyan

doi:10.1016/j.energy.2023.127056

Cited by 18 publications

(2 citation statements)

References 41 publications

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“…Compared with the N0 fuel, the CO 2 emissions of low, medium, and high speed conditions decrease by 44%, 45%, and 45%, respectively, when burning the N50, which is basically the same. Wang et al [34] simulated the effect of premixed natural gas-ammonia and diesel ignition on engine combustion. The results showed that the emission of CO 2 decreased significantly with an increase in ammonia content.…”

Section: Emission Performance 331 Co 2 Emissionmentioning

confidence: 99%

Effects of Methanol–Ammonia Blending Ratio on Performance and Emission Characteristics of a Compression Ignition Engine

Huang,

Lyu,

Luo

et al. 2023

JMSE

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Sustainable ammonia is one of the leading candidates in the search for alternative clean fuels for marine applications. This paper aims to build a simulation model of a six-cylinder, four-stroke diesel engine to investigate the effects of increasing the ammonia proportion in methanol–ammonia fuel blends on engine performance and emissions. In the present study, the conditions of different speeds and different proportions of ammonia in fuel blends are investigated. The results show that the average effective pressure, brake power, and brake torque increase by about 5% with an increased ammonia substitution ratio. In terms of economic performance, the changes under medium and low speed conditions are not obvious. However, the change in high speed conditions is significant. The brake specific fuel consumption (BSFC) is reduced by 6.6%, and the brake thermal efficiency (BTE) is increased by 4%. It is found that the performance of the engine is best at medium speed. The best performance is achieved with higher efficiency and lower emissions. The present results can provide guidance for the optimization of ammonia–methanol blends and their applications in engines.

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Section: Emission Performance 331 Co 2 Emissionmentioning

confidence: 99%

Effects of Methanol–Ammonia Blending Ratio on Performance and Emission Characteristics of a Compression Ignition Engine

Huang,

Lyu,

Luo

et al. 2023

JMSE

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“…The authors found that NO x emissions remained at moderate levels with a 30% energy fraction of NH 3 (equivalent to roughly 52% of the molar fraction). Wang et al 13 found that blending 90% NH 3 −CH 4 (40% CH 4 −60% NH 3 ) with 10% diesel can effectively decrease the occurrence of knock combustion in the cylinder for compression−ignition engines and help to achieve zero-carbon emissions.…”

Section: Introductionmentioning

confidence: 99%

Ignition Delay Times and Chemical Reaction Kinetic Analysis for the Ammonia–Natural Gas Blends

Liu,

Zhou,

Zhang

et al. 2024

Energy Fuels

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The combustion characteristics of ammonia−natural gas (NH 3 − NG) blends are usually studied using ammonia−methane (NH 3 −CH 4 ) blends. However, the ignition characteristics of NH 3 −NG and NH 3 −CH 4 are different due to ethane (C 2 H 6 ) and propane (C 3 H 8 ) in NH 3 −NG. In the present study, a natural gas fuel model (96.73% CH 4 , 2.59% C 2 H 6 , and 0.68% C 3 H 8 in molar fraction) was constructed using the real composition of China natural gas to investigate the ignition delay times (IDTs) of NH 3 −NG. The IDTs of pure NH 3 , 50% NH 3 −50% CH 4 , 50% NH 3 −50% NG, and pure NG were measured experimentally using a high-pressure shock tube under an ignition pressure (P i ) of 10 bar, ignition temperatures (T i ) ranging from 1450 to 1900 K, and with 95% argon (Ar) dilution. The NUIG mechanism was selected for investigating chemical reaction kinetics. The IDTs for the fuels follow this order: 100% NH 3 > 50% NH 3 −50% CH 4 > 50% NH 3 −50% NG > 100% NG. At T i = 1600 and 1800 K, the IDTs for NH 3 −NG are 38.4 and 33.3% shorter than NH 3 −CH 4 , respectively. Adding C 2 H 6 and C 3 H 8 increases the CH 3 radical mole fraction during the first half of the ignition process (0−0.5 IDTs). During this stage, C 2 H 6 participates in the NH 2 → NH 3 transition via reaction C 2 H 6 + NH 2 ⇔ C 2 H 5 + NH 3 (R11); in the meantime, the C 3 H 8 is depleted through the reaction C 3 H 8 (+M) ⇔ C 2 H 5 + CH 3 (+M) (R9). During the second half of the ignition process (0.5−1.0 IDTs), the differences between NH 3 −CH 4 and NH 3 −NG become insignificant. C 2 H 6 and C 3 H 8 mainly affect the first half of the NH 3 −NG ignition process, resulting in shortened IDTs.

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Flame characteristics and abnormal combustion of ammonia-diesel dual-fuel engine with considering ammonia energy fractions

Chen,

Zhao,

Zhang

et al. 2024

Applied Thermal Engineering

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Study on the performance of premixed natural gas/ammonia engine with diesel ignition

Cited by 18 publications

References 41 publications

Effects of Methanol–Ammonia Blending Ratio on Performance and Emission Characteristics of a Compression Ignition Engine

Effects of Methanol–Ammonia Blending Ratio on Performance and Emission Characteristics of a Compression Ignition Engine

Ignition Delay Times and Chemical Reaction Kinetic Analysis for the Ammonia–Natural Gas Blends

Flame characteristics and abnormal combustion of ammonia-diesel dual-fuel engine with considering ammonia energy fractions

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