Study on the application of DME/diesel blends in a diesel engine

Wang, Ying; Li, Genbao; Zhu, Wenwu; Zhou, Lei

doi:10.1016/j.fuproc.2008.05.023

Cited by 94 publications

(50 citation statements)

References 5 publications

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“…Due to its high cetane number (> 55), DME is considered a good alternative to diesel. DME has been studied experimentally in diesel engines [4][5][6][7] showing its advantages in terms of emissions and engine efficiency. Particulate matter (PM) emissions were found to be greatly reduced, as were NO x and SO x , while there was a slight increase in carbon monoxide (CO) and hydrocarbon (HC) emissions.…”

Section: Introductionmentioning

confidence: 99%

An ignition delay and kinetic modeling study of methane, dimethyl ether, and their mixtures at high pressures

Burke

Somers

O’Toole

et al. 2015

Combustion and Flame

384

279

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The development of accurate chemical kinetic models capable of predicting the combustion of methane and dimethyl ether in common combustion environments such as compression ignition engines and gas turbines is important as it provides valuable data and understanding of these fuels under conditions that are difficult and expensive to study in the real combustors. In this work, both experimental and chemical kinetic model-predicted ignition delay time data are provided covering a range of conditions relevant to gas turbine environments (T = 600 − 1600 K, p = 7 − 41 atm, φ = 0.3, 0.5, 1.0, and 2.0 in 'air' mixtures). The detailed chemical kinetic model (Mech 56.54) is capable of accurately predicting this wide range of data, and it is the first mechanism to incorporate high-level rate constant measurements and calculations where available for the reactions of DME. This mechanism is also the first to apply a pressure-dependent treatment to the low-temperature reactions of DME. It has been validated using available literature data including flow reactor, jet-stirred reactor, shock-tube ignition delay times, shock-tube speciation, flame speed, and flame speciation data. New ignition delay time measurements are presented for methane, dimethyl ether, and their mixtures; these data were obtained using three different shock tubes and a rapid compression machine. In addition to the DME/CH 4 blends, high-pressure data for pure DME and pure methane were also obtained. Where possible, the new * address:

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Section: Introductionmentioning

confidence: 99%

An ignition delay and kinetic modeling study of methane, dimethyl ether, and their mixtures at high pressures

Burke

Somers

O’Toole

et al. 2015

Combustion and Flame

384

279

View full text Add to dashboard Cite

show abstract

“…(i) High oxygen content: DME contains 35% by weight oxygen (Ying et al, 2008). Together with the absence of any C-C bonds it is responsible for its smokeless combustion, low formation and high oxidation rates of particulates.…”

Section: Resultsmentioning

confidence: 99%

“…(i) Low combustion enthalpy: The low calorific value of DME is only 64.7% of that of diesel (Ying et al, 2008), which necessitates a larger injected volume and longer injection period for DME in order to deliver the same amount of energy to that provided by diesel.…”

Section: Dme Disadvantagesmentioning

confidence: 99%

Impact of Di-Methyl Ether (DME) As an Additive Fuel for Compression Ignition Engine in Reduction of Urban Air Pollution

Maji¹,

Ahmed²,

Siddiqui³

et al. 2014

IJIRSET

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ABSTRACT:With ever growing concerns on environmental pollution, energy security and future oil supplies, the global community is seeking nonpetroleum based alternative fuels to increase the efficiency of energy use. Di-methyl ether (DME) can be used as a clean, high-efficiency compression ignition (CI) engine fuel with reduced NOx, SOx, and particulate matter. DME"s diesel engine-compatible properties are its high cetane number and low auto-ignition temperature. However, physical properties of DME (viz. lower viscosity, lubricity, combustion enthalpy and boiling point)demands modifications to diesel engine internal structures and components.The technology with pure DME as an alternative fuel for CI engine and vehicle is still under development stage. However, if DME is used as an additive fuel with diesel, the relative "goodness" of each fuel might be utilized. This paper analyses the potential benefit of blending DME in diesel fuel in reduction of urban air pollution.

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“…It can also be used as a blend with diesel to overcome limitations of using pure DME, such as poor viscosity, low density and its after-effects [18,[54][55][56]. DME-Diesel blends or a higher cylinder pressure can help to keep the fuel in liquid state in the fuel lines.…”

Section: Dme As a Diesel Substitute: Advantages And Disadvantagesmentioning

confidence: 99%

“…Existing oil resources are subject to pressure from global development in addition to pressure from increasing production costs associated with conventional and non-conventional petroleum resources [17]. This necessitates the identification of alternate options while keeping in mind the emission regulations these future fuels need to address [18]. In particular, the use of diesel engines has grown significantly in recent decades due to their higher thermal efficiency and hence lower fuel consumption as compared to petrol engines.…”

Section: Introductionmentioning

confidence: 99%

A study on the control of NOx and particulate matter emissions from dimethyl ether combustion in compression ignition engines

Thomas¹

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Dimethyl Ether (DME) is a new age fuel developed mainly from coal and natural gas to use in compression ignition (CI) engines relatively easily with minimum modifications. One of the advantages of DME combustion in CI engines is the low emission levels of NOx and particulate matter (PM) in comparison with diesel combustion. Therefore, utilization of DME as an alternative fuel in CI engines can potentially meet stricter emission regulations with less effort.The thesis starts with a review of the body of experimental and numerical research on NOx and PM emissions from DME combustion, with the objective being to identify the most promising methods for emission control in DME fuelled engines. With DME being already available in several countries the current research interest is to optimize the engine performance in a cost-effective way with least modifications to existing technologies while minimizing combustion emissions to meet even the strictest emission regulations.Gaseous emissions from DME combustion are a well-researched topic while PM emissions, especially UFPM were neglected so far. However, PM emissions will become a major concern under the future emission norms such as Euro VI. A major part of the introduction and literature review discusses some of the novel methods of emission control

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Study on the application of DME/diesel blends in a diesel engine

Cited by 94 publications

References 5 publications

An ignition delay and kinetic modeling study of methane, dimethyl ether, and their mixtures at high pressures

An ignition delay and kinetic modeling study of methane, dimethyl ether, and their mixtures at high pressures

Impact of Di-Methyl Ether (DME) As an Additive Fuel for Compression Ignition Engine in Reduction of Urban Air Pollution

A study on the control of NOx and particulate matter emissions from dimethyl ether combustion in compression ignition engines

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