Experimental and numerical study of laminar premixed dimethyl ether/methane–air flame

Yu, Huibin; Hu, Erjiang; Cheng, Yu; Zhang, Xinyi; Huang, Zuohua

doi:10.1016/j.fuel.2014.07.032

Cited by 59 publications

(17 citation statements)

References 43 publications

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“…The temperature of the fuel/air mixtures was taken as 295 K. The uncertainties in measured equivalence ratios and exit velocities result in an uncertainty in setting the flame temperature of less than 20 K (see below). Due to the high pressure drop in the burner and low vapor pressure of DME (∼4.4 bar) at room temperature, the highest exit velocity of the unburned DME/air mixture in the present setup is limited to 35 cm/s, which is lower than the free-flame burning velocity at φ = 1.0 (∼44 cm/s) reported in other studies. − As a result, it was impossible to reach adiabatic conditions in DME flames with free-burning velocities higher than 35 cm/s. Although this limitation has few consequences for the results described below (which rely on the variations in flame temperature with exit velocity), it does limit the assessment of the uncertainty of the Raman measurements at higher temperatures.…”

Section: Experimental Setup and Modelingcontrasting

confidence: 54%

Variation in Flame Temperature with Burner Stabilization in 1D Premixed Dimethyl Ether/Air Flames Measured by Spontaneous Raman Scattering

2019

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The flame temperatures in flat, laminar premixed dimethyl ether (DME)/air flames with varying degrees of burner stabilization were measured by spontaneous Raman scattering in a range of equivalence ratio (φ) from 0.6 to 2.0. Three commonly used mechanisms to describe DME oxidation were evaluated by comparing the calculated variation of flame temperature derived from one-dimensional flame calculations as a function of DME/air exit velocity with those obtained from the measurements. The results showed the necessity of incorporating radiative heat losses in the flame calculations. The three mechanisms yield similar results at φ = 0.6 and 2.0, underpredicting the temperatures more than 30 K. Differences between the measured and predicted temperatures for burner-stabilized flames are seen to indicate whether a free-flame burning velocity (S L ) is too high or too low. The results suggest a free-flame burning velocity of ∼14 cm/s at φ = 0.6, 2 cm/s lower than the mechanisms predicted, and burning velocities closer to 49 and 40 cm/s for φ = 1.0 and 1.4, respectively. Sensitivity analysis of the DME/air flame temperature as a function of exit velocity shows that the DME decomposition reaction and H abstraction from DME become important in the rich flames at φ = 1.7 and 2.0.

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Section: Experimental Setup and Modelingcontrasting

confidence: 54%

Variation in Flame Temperature with Burner Stabilization in 1D Premixed Dimethyl Ether/Air Flames Measured by Spontaneous Raman Scattering

2019

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“… a Experimental measured data from the literature at initial conditions: P = 1 atm, T ≈ 298 K, and φ = 1.0. ,− b Under conditions of a homogeneous constant volume reactor at P = 20 bar, T = 900 K, and φ = 1.0. …”

Section: Applicationsmentioning

confidence: 99%

“… a Experimental measured data from the literature at initial conditions: P = 1 atm, T ≈ 298 K, and φ = 1.0. ,− …”

Section: Applicationsmentioning

confidence: 99%

Review on Ammonia as a Potential Fuel: From Synthesis to Economics

et al. 2021

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Ammonia, a molecule that is gaining more interest as a fueling vector, has been considered as a candidate to power transport, produce energy, and support heating applications for decades. However, the particular characteristics of the molecule always made it a chemical with low, if any, benefit once compared to conventional fossil fuels. Still, the current need to decarbonize our economy makes the search of new methods crucial to use chemicals, such as ammonia, that can be produced and employed without incurring in the emission of carbon oxides. Therefore, current efforts in this field are leading scientists, industries, and governments to seriously invest efforts in the development of holistic solutions capable of making ammonia a viable fuel for the transition toward a clean future. On that basis, this review has approached the subject gathering inputs from scientists actively working on the topic. The review starts from the importance of ammonia as an energy vector, moving through all of the steps in the production, distribution, utilization, safety, legal considerations, and economic aspects of the use of such a molecule to support the future energy mix. Fundamentals of combustion and practical cases for the recovery of energy of ammonia are also addressed, thus providing a complete view of what potentially could become a vector of crucial importance to the mitigation of carbon emissions. Different from other works, this review seeks to provide a holistic perspective of ammonia as a chemical that presents benefits and constraints for storing energy from sustainable sources. State-of-the-art knowledge provided by academics actively engaged with the topic at various fronts also enables a clear vision of the progress in each of the branches of ammonia as an energy carrier. Further, the fundamental boundaries of the use of the molecule are expanded to real technical issues for all potential technologies capable of using it for energy purposes, legal barriers that will be faced to achieve its deployment, safety and environmental considerations that impose a critical aspect for acceptance and wellbeing, and economic implications for the use of ammonia across all aspects approached for the production and implementation of this chemical as a fueling source. Herein, this work sets the principles, research, practicalities, and future views of a transition toward a future where ammonia will be a major energy player.

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“…Yu et al [75] investigated the laminar burning characteristics (unstretched laminar burning velocity, Markstein length, critical Peclet number, and cellular critical radius) of DMC with air, premixed mixtures at different conditions of pressures, temperatures, and equivalence ratios. The experiments were carried out at constant volume combustion with high-speed Schlieren photograph system.…”

Section: Laminar Burning Characteristics Of Dmcmentioning

confidence: 99%

Dimethyl Carbonate as a Promising Oxygenated Fuel for Combustion: A Review

Abdalla

Liu

2018

Energies

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Energy shortage and environmental problems are two dominant subjects. Dimethyl carbonate (DMC) is one of the oxygenated fuels with increasing interest as the alternative to diesel fuel or additive for conventional hydrocarbon fuels. In the last decade, comprehensive studies on DMC have been carried out in terms of synthesis, use, and oxidation and combustion mechanism. DMC synthesis from greenhouse gas such as carbon dioxide can achieve the carbon circulation between air and fuel. Ethylene carbonate route is one of the most promising ways to utilize carbon dioxide and synthesize DMC in terms of particle efficiency, energy consumption per one unit of product, and net carbon dioxide emission. In addition, the results show that pure DMC in compression ignition (CI) engines or DMC addition in diesel/gasoline could decrease emissions significantly. Moreover, DMC pyrolysis form carbon dioxide before carbon monoxide which is different from other oxygenated fuels. However, DMC can produce formaldehyde during oxidation process in high concentration, which is harmful to the environment and human health as well. The present DMC kinetic model needs to update the major reactions constant through recognizing the initial decomposition routes and low-temperature oxidation. In addition, further studies on the DMC/hydrocarbon fuels mixtures for the interaction chemistry are needed.

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Experimental and numerical study of laminar premixed dimethyl ether/methane–air flame

Cited by 59 publications

References 43 publications

Variation in Flame Temperature with Burner Stabilization in 1D Premixed Dimethyl Ether/Air Flames Measured by Spontaneous Raman Scattering

Variation in Flame Temperature with Burner Stabilization in 1D Premixed Dimethyl Ether/Air Flames Measured by Spontaneous Raman Scattering

Review on Ammonia as a Potential Fuel: From Synthesis to Economics

Dimethyl Carbonate as a Promising Oxygenated Fuel for Combustion: A Review

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