The influence of ammonia on the laminar burning velocities of methylcyclohexane and toluene: An experimental and kinetic modeling study

Lavadera, Marco Lubrano; Pelucchi, Matteo; Konnov, Alexander A.

doi:10.1016/j.combustflame.2021.111839

Cited by 20 publications

(3 citation statements)

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“…This inhibitory effect on mixtures may be attributed to the OH radical scavenging effect of NH 3 . 49 The influence of the oxygen concentration and equivalence ratio on the IDTs shows a negative correlation, as shown in Figure 4b,c. Doubling the oxygen concentration reduces the IDTs by approximately 88.7%, while the IDTs are decreased by about two times as the equivalence ratio increases from 0.5 to 1.0.…”

Section: Resultsmentioning

confidence: 81%

“…As the NER increases from 50 to 90%, the “temperature threshold” for the autoignition of NH 3 /HMN mixtures shifts to a higher region and the overall IDTs is prolonged. This inhibitory effect on mixtures may be attributed to the OH radical scavenging effect of NH 3 . The influence of the oxygen concentration and equivalence ratio on the IDTs shows a negative correlation, as shown in Figure b,c.…”

Section: Resultsmentioning

confidence: 83%

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Investigating Autoignition Characteristics of Ammonia/Heptamethylnonane Mixtures Over Wide Pressure Ranges: Rapid Compression Machine Measurements and Kinetic Modeling Study

Zhang,

Zhou,

et al. 2024

Energy Fuels

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Ammonia (NH 3 ) blending combustion with highreactivity fuel has garnered substantial attention in terms of decarbonization potential in internal combustion engines. 2,2,4,4,6,8,8-Heptamethylnonane, denoted as HMN, an important large-molecular weight component for diesel and jet fuel surrogates, was selected to be blended with NH 3 in this study. The ignition delay times (IDTs) of NH 3 /HMN mixtures were measured using a heated rapid compression machine (RCM) over an extensive range of conditions (temperature of 680−1025 K, pressure of 20−100 bar, equivalence ratios of 0.5−1.0, and NH 3 energy ratio (NER) of 50−90%). Experimental results show that increasing the pressure, equivalence ratio, and oxygen concentration reduces both the total and first-stage IDTs, while an increase in the NH 3 energy ratio prolongs the IDTs. For the mixture with the lowest NH 3 energy ratio of 50%, non-Arrhenius-type behavior was observed at a pressure of 20 bar, while it transfers to a monotonic decrease of IDTs with increasing temperature at a pressure of 40 bar. An NH 3 /HMN blending mechanism was developed by merging individual NH 3 and HMN submechanisms, updating NH 3 submechanism, and adding C−N cross-reaction subset. Simulation results show that under most experimental conditions, the blending mechanism exhibits reasonable prediction on the measured NH 3 /HMN IDTs. Kinetic analysis shows that the discrepancy in the first-stage ignition between experiments and simulations may be associated with the inaccurate OH consumption proportion between HMN and NH 3 , while at the intermediate-temperature region, it may be related to the core C 0 −C 4 mechanism and the NH 3 -related reactions. Further experimental or quantum calculations are needed in the future to refine the NH 3 /HMN blending mechanism on the basis of this work.

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Section: Resultsmentioning

confidence: 81%

Section: Resultsmentioning

confidence: 83%

Investigating Autoignition Characteristics of Ammonia/Heptamethylnonane Mixtures Over Wide Pressure Ranges: Rapid Compression Machine Measurements and Kinetic Modeling Study

Zhang,

Zhou,

et al. 2024

Energy Fuels

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“…Ammonia/syngas blends have also been evaluated with good results [82][83][84], as well as ammonia/methanol and ammonia/ethanol blends [85][86][87]. Even several blends of ammonia with different organic compounds, e.g., methylcyclohexane and toluene [88], dimethoxymethane [89], n-heptane and isooctane [90], or more complex gas mixtures, such as hydrogen, methane and propane [91], NH 3 /C 3 H 8 /air [92], NH 3 /CH 4 /H 2 S [63] and CH 4 /H 2 /NH 3 -air mixtures [93,94], have been used.…”

Section: Ammonia As An Electricity Generator In Combined Cycle Gas Tu...mentioning

confidence: 99%

Current Research on Green Ammonia (NH3) as a Potential Vector Energy for Power Storage and Engine Fuels: A Review

et al. 2023

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Considering the renewable electricity production using sustainable technologies, such as solar photovoltaics or wind turbines, it is essential to have systems that allow for storing the energy produced during the periods of lower consumption as well as the energy transportation through the distribution network. Despite hydrogen being considered a good candidate, it presents several problems related to its extremely low density, which requires the use of very high pressures to store it. In addition, its energy density in volumetric terms is still clearly lower than that of most liquid fuels. These facts have led to the consideration of ammonia as an alternative compound for energy storage or as a carrier. In this sense, this review deals with the evaluation of using green ammonia for different energetic purposes, such as an energy carrier vector, an electricity generator and E-fuel. In addition, this study has addressed the latest studies that propose the use of nitrogen-derived compounds, i.e., urea, hydrazine, ammonium nitrate, etc., as alternative fuels. In this study, the possibility of using other nitrogen-derived compounds, i.e., an update of the ecosystem surrounding green ammonia, has been assessed, from production to consumption, including storage, transportation, etc. Additionally, the future challenges in achieving a technical and economically viable energy transition have been determined.

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Effect of Various Fuel Blends on the Laminar Burning Velocity of Ammonia–Air Mixtures

Berwal,

Kumar

2024

Energy, Environment, and Sustainability

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The influence of ammonia on the laminar burning velocities of methylcyclohexane and toluene: An experimental and kinetic modeling study

Cited by 20 publications

References 100 publications

Investigating Autoignition Characteristics of Ammonia/Heptamethylnonane Mixtures Over Wide Pressure Ranges: Rapid Compression Machine Measurements and Kinetic Modeling Study

Investigating Autoignition Characteristics of Ammonia/Heptamethylnonane Mixtures Over Wide Pressure Ranges: Rapid Compression Machine Measurements and Kinetic Modeling Study

Current Research on Green Ammonia (NH3) as a Potential Vector Energy for Power Storage and Engine Fuels: A Review

Effect of Various Fuel Blends on the Laminar Burning Velocity of Ammonia–Air Mixtures

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