Measurement of Trace Levels of Harmful Substances Emitted from a DME DI Diesel Engine

Oguma, Mitsuharu; Shiotani, Hitoshi; Goto, Shinichi; Suzuki, Shingo

doi:10.4271/2005-01-2202

Cited by 9 publications

(3 citation statements)

References 10 publications

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“…The formaldehyde emissions could be 1-10% of the non-methane hydrocarbon emissions [1,35]. Aldehydes may also be high because associated CO emissions are high, although formaldehydes can be easily reduced by oxidation catalysts to a negligible level [55].…”

Section: Non-regulated Exhaust Emissionsmentioning

confidence: 99%

The potential of di-methyl ether (DME) as an alternative fuel for compression-ignition engines: A review

Arcoumanis

Bae

Crookes

et al. 2008

Fuel

894

412

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Citation: Arcoumanis, C., Bae, C., Crookes, R. and Kinoshita, E. (2008). The potential of di-methyl ether (DME) as an alternative fuel for compression-ignition engines: A review. Fuel, 87(7), pp. 1014-1030. doi: 10.1016/j.fuel.2007.06.007 This is the accepted version of the paper.This version of the publication may differ from the final published version. Permanent AbstractThis paper reviews the properties and application of di-methyl ether (DME) as a candidate fuel for compression-ignition engines. DME is produced by the conversion of various feedstock such as natural gas, coal, oil residues and bio-mass. To determine the technical feasibility of DME, the review compares its key properties with those of diesel fuel that are relevant to this application. DME's diesel engine-compatible properties are its high cetane number and low auto-ignition temperature. In addition, its simple chemical structure and high oxygen content result in soot-free combustion in engines. Fuel injection of DME can be achieved through both conventional mechanical and current common-rail systems but requires slight modification of the standard system to prevent corrosion and overcome low lubricity. The spray characteristics of DME enable its application to compression-ignition engines despite some differences in its properties such as easier evaporation and lower density. Overall, the low particulate matter production of DME provides adequate justification for its consideration as a candidate fuel in compression-ignition engines. Recent research and development shows comparable output performance to a diesel fuel led engine but with lower particulate emissions. NO x emissions from DME-fuelled engines can meet future regulations with high exhaust gas recirculation in combination with a lean NO x trap. Although more development work has focused on medium or heavy-duty engines, this paper provides a comprehensive review of the technical feasibility of DME as a candidate fuel for environmentally-friendly compression-ignition engines independent of size or application.

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Section: Non-regulated Exhaust Emissionsmentioning

confidence: 99%

The potential of di-methyl ether (DME) as an alternative fuel for compression-ignition engines: A review

Arcoumanis

Bae

Crookes

et al. 2008

Fuel

894

412

View full text Add to dashboard Cite

show abstract

“…Combustion DME results in lower HC emissions than diesel fuel combustion because DME has a high cetane number, as well as good evaporation, atomization and mixing characteristics, which causes the DME ignition delay to be shorter compared to diesel. This makes the formation of over-rich or over-lean regions mixture regions resulting in significantly reduced HC emissions [24,[41][42][43]. In addition, the presence of oxygen in the DME molecule contributes to relatively smaller fuel regions compared to diesel, which also reduces HC emissions.…”

Section: Hc Emissionmentioning

confidence: 99%

Dimethyl ether (DME) as potential environmental friendly fuel

et al. 2019

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In recent years, there has been a growing interest in replacing petroleum fuels with so-called second generation environmental friendly fuels. Compared to traditional petroleum fuels dimethyl ether (DME) could be used as a clean high-efficiency compression ignition fuel with reduced particulate matter (PM), sulfur oxides (SOx), hydrocarbons (HC), carbon monoxide (CO) as well as combustion noise. Compared to some of the other leading alternative fuel candidates i.e., methane, methanol, ethanol, compressed natural gas, DME appears to have the largest potential impact on society including well-to-wheel greenhouse gas emissions, non-petroleum feedstocks, well-to-wheel efficiencies, fuel versatility, infrastructure, availability, economics, and safety and should be considered as the fuel of choice for eliminating the dependency on petroleum. This paper reviews the properties and the DME combustion effects on environmental and they were compared to diesel characteristic as well as the effect of blending DME with liquefied petroleum gas (LPG), conventional diesel fuel and biodiesel were discussed.

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“…Previous studies have shown significant advantages (such as potential for low PM and NOx emissions, and decreased fuel consumption) [3][4][5] and disadvantages (such as poor lubricity, long injection duration, and toxicity) of these two alternative fuels for use in internal combustion engines. [6][7][8][9][10] There are several studies successfully utilizing the combination of methanol and DME for diesel engines. In earlier studies, DME was always treated as a methanol engine's ignition enhancer.…”

Section: Introductionmentioning

confidence: 99%

Experimental study of effects of exhaust gas recirculation and combustion mode on combustion, emission, and performance of DME‐methanol ‐fueled turbocharged c ommon‐rail engine

Sun

Liu

Qiao

et al. 2021

Intl J of Energy Research

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In this study, the effects of exhaust gas recirculation (EGR) on the combustion, performance, and emission of a six-cylinder turbocharged common-rail dimethyl ether (DME) engine with methanol blends are experimentally investigated, and the proportions of methanol considered are 0% (DME), 5% (M5), 10% (M10), and 15% (M15) by weight. A comparison of direct-injection compression ignition (DICI) combustion and partially premixed charge compression ignition (P-PCCI) combustion is conducted, and P-PCCI combustion is achieved by a two-stage injection. The results indicate that the NOx emissions decrease, but the CO and HC emissions increase approximately linearly as the EGR rate increases. The addition of methanol delays the combustion, shortens the combustion duration, and increases the pressure rise rate. In addition, the NOx emissions decrease, whereas the CO and HC emissions increase significantly as the methanol proportion increases. M5 exhibits the lowest fuel consumption for both the P-PCCI and DICI combustions. Compared to the DICI mode, in the P-PCCI mode, the peak in-cylinder pressure is higher, maximum pressure rise rate is considerably lower, NOx emissions are better suppressed and approximately 20% lower, CO and HC emissions are greater, and particle emission is slightly lower.

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Measurement of Trace Levels of Harmful Substances Emitted from a DME DI Diesel Engine

Cited by 9 publications

References 10 publications

The potential of di-methyl ether (DME) as an alternative fuel for compression-ignition engines: A review

The potential of di-methyl ether (DME) as an alternative fuel for compression-ignition engines: A review

Dimethyl ether (DME) as potential environmental friendly fuel

Experimental study of effects of exhaust gas recirculation and combustion mode on combustion, emission, and performance of DME‐methanol ‐fueled turbocharged c ommon‐rail engine

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