MTBE for Improved Diesel Combustion and Emissions?

Kajitani, Shuichi; Usisaki, H.; Clasen, E.; Campbell, Steven; Rhee, K. T.

doi:10.4271/941688

Cited by 10 publications

(4 citation statements)

References 5 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Diesel engines are also the major contributors of various types of air polluting exhaust gas such as PM, CO, NO x , sulphur, and other harmful compounds. It has been shown that the formation of these air pollutants can be significantly reduced by blending oxygenates including MTBE into the base diesel [8][9][10]. Various oxygenated compounds such as dimethyl carbonate, diethylene glycol dimethyl ether, ethylene glycol di-tert-butyl ether, and MTBE have been tested in a direct-injection (DI) diesel engine [8].…”

Section: Introductionmentioning

confidence: 99%

“…The results show that, for similar oxygen contents among the compounds, MTBE-blended fuel has the maximum smoke reduction capability. The test results of MTBE in an indirect-injection diesel engine show a remarkable reduction in NO x emissions with MTBE-blended fuel in comparison with that of neat diesel fuel [9]. Laboratory and field tests with oxygenated diesel were conducted in diesel engines [10].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Investigation of methyl tertiary butyl ether—diesel combustion and odorous emissions in a direct-injection diesel engine

Roy

2008

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

This study investigated methyl tertiary butyl ether (MTBE)-blended diesel fuel combustion and odorous emissions in a direct-injection diesel engine during and after engine warm-up at idling. A few per cent of MTBE (5 vol %) blended in diesel fuel gives lower formaldehyde (HCHO) and an improved exhaust odour than with neat diesel fuel owing to good mixture formation and combustion for lower boiling point and oxygen (O2) of the blend. With the 10 and 15 vol % MTBE blends, the very-low-boiling-point MTBE forms an overlean mixture and diminishes the positive effect of the O2 content of MTBE causing the exhaust odour and odorous emissions to deteriorate. Ignition delay of all MTBE blends is about 1—3° crank angle longer than that of neat diesel fuel depending on the engine running conditions. However, the combustion pressures and temperatures of the 5 vol % MTBE blend are similar to or a very little lower than that of neat diesel fuel. However, the 10 and 15 vol % MTBE blends show considerable decreases in the combustion pressures and temperatures.

show abstract

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigation of methyl tertiary butyl ether—diesel combustion and odorous emissions in a direct-injection diesel engine

Roy

2008

Proceedings of the Institution of Mechanical Engineers, Part D:

View full text Add to dashboard Cite

show abstract

“…Thus, Eq. (1) can be written as (6) Writing Eq. (6) in the logarithmic form and rearranging, the following equation can be derived and this should fit every set of experimental data: (7) To determine the proper n and m parameters, the square of the correlation coefficient of the linear regression between the left-hand side of Eq.…”

Section: Oxidation Kinetics Analysis Of Soot Samplementioning

confidence: 99%

“…As a consequence, the brake thermal efficiency improves and a there is a considerable reduction in the generation of smoke [5]. Furthermore, the addition of a small amount of MTBE to diesel reduces soot and NO x emissions simultaneously [6]. At higher temperatures, some fraction of MTBE may persist, decompose, and be used in oxidizing the soot before completing the combustion process inside the engine cylinder, which results in smaller amounts of soot [7].…”

Section: Introductionmentioning

confidence: 99%

Ignition Delay and Soot Oxidative Reactivity of MTBE Blended Diesel Fuel

Yang

Naser

Chung

et al. 2014

SAE Technical Paper Series

View full text Add to dashboard Cite

Methyl tert-butyl ether (MTBE) was added to diesel fuel to investigate the effect on ignition delay and soot oxidative reactivity.An ignition quality tester (IQT) was used to study the ignition propensity of MTBE blended diesel fuels in a reactive spray environment. The IQT data showed that ignition delay increases linearly as the MTBE fraction increases in the fuel.A four-stroke single cylinder diesel engine was used to generate soot samples for a soot oxidation study. Soot samples were pre-treated using a tube furnace in a nitrogen environment to remove any soluble organic fractions and moisture content. Non-isothermal oxidation of soot samples was conducted using a thermogravimetric analyzer (TGA).It was observed that oxidation of 'MTBE soot' started began at a lower temperature and had higher reaction rate than 'diesel soot' across a range of temperatures. Several kinetic analyses including an isoconversional method and a combined model fitting method were carried out to evaluate kinetic parameters.The results showed that Diesel and MTBE soot samples had similar activation energy but the pre-exponential factor of MTBE soot was much higher than that of the Diesel soot. This may explain why MTBE soot was more reactive than Diesel soot.It is suggested that adding MTBE to diesel fuel is better for DPF regeneration since an MTBE blend can significantly influence the ignition characteristics and, consequently, the oxidative reactivity of soot.

show abstract