Numerical Analysis of Carbon Monoxide Formation in DME Combustion Ibaraki Univ

Format:

Book

Conference/Event

Author/Creator:

Muramatsu, Yuya, author.

Contributor:

Konno, Mitsuru

Oguma, Mitsuharu

Yanai, Tadanori

Conference Name:

Small Engine Technology Conference & Exposition (2011-11-08 : Sapporo, Japan)

Language:

English

Physical Description:

1 online resource cm

Place of Publication:

Tokyo, JAPAN Society of Automotive Engineers of Japan 2011

Summary:

Dimethyl ether (DME) is an oxygenated fuel with the molecularformula CH₃OCH₃, economically produced from various energy sources,such as natural gas, coal and biomass. It has gained prominence asa substitute for diesel fuel in Japan and in other Asian countries,from the viewpoint of both energy diversification and environmentalprotection. The greatest advantage of DME is that it emitspractically no particulate matter when used in compression ignition(CI) engine. However, one of the drawbacks of DME CI engine is theincrease carbon monoxide (CO) emission in high-load and highexhaust gas circulation (EGR) regime.In this study, we have investigated the CO formationcharacteristics of DME CI combustion based on chemical kinetics. Inorder to understand the equivalence ratio (φ) - temperature (T)dependence of CO formation in DME combustion, we generated the COφ-T map through numerical calculations with detailed chemicalreaction models and compared it with that of methanecombustion.Our results show that DME combustion has a local CO peak at atemperature of around 1000 K, which is a distinctive feature ofDME, although general CO formation properties are not unlike thoseof methane combustion, in which the CO emission increases withtemperature and equivalence ratio. The analysis of reaction pathsshows that this local CO peak is produced by active low-temperaturereactions during DME oxidation process

Notes:

Vendor supplied data

Publisher Number:

2011-32-0632

Access Restriction:

Restricted for use by site license