Control of NOx from a DI diesel engine with hot EGR and ethanol fumigation: An experimental investigation

Title

Control of NOx from a DI diesel engine with hot EGR and ethanol fumigation: An experimental investigation

Creator

Hebbar G.S.; Bhat A.K.

Description

Oxides of nitrogen (NOx) are one of the major hazardous pollutants from diesel engine emission. Various control technologies exist for its control but each technique has advantages and disadvantages. At present, there is no single optimal technique that can control NOx without other side effects. Technologies available for NOx reductions either cause fuel penalty or increase other polluting emissions. Exhaust Gas Recirculation is an effective technique in controlling oxides of nitrogen in diesel engines but do not become attractive at higher loads and higher percentage of recirculated gas as combustion tends to deteriorate at higher loads leading to reduced engine thermal efficiency and increased hydrocarbon and smoke emission. Ethanol is an established alternate fuel used in diesel engine either as a blend or fumigated using a separate injector. Experiments were conducted on a single cylinder diesel engine to examine the effect of EGR temperature on NOx and other emission constituents. Hot EGR gave better results up to 30% EGR rate but EGR cooling was found better in terms of NOx reductions and efficiency. It was found that NOx reductions up to 88% was possible but at the cost of about 18% loss in thermal efficiency. This inconvenience of fuel penalty caused by Exhaust Gas Recirculation can be overcome by applying ethanol fumigation. The findings of experimental results for this combined technique are presented in this paper. With this combined technique, apart from reducing the oxides of nitrogen, engine power and efficiency approaches to that of only diesel combustion condition with improvements in smoke, hydrocarbon and carbon monoxide emissions. 2013 The Korean Society of Automotive Engineers and Springer-Verlag Berlin Heidelberg.

Source

International Journal of Automotive Technology, Vol-14, No. 3, pp. 333-341.

Date

2013-01-01

Subject

Efficiency; EGR; Ethanol; Fumigation; HC; NOx; Smoke

Coverage

Hebbar G.S., Mechanical Engineering Department, Christ University Faculty of Engineering, Kumbalagodu-Kengeri, Bangaluru, 560074 Karnataka State, India; Bhat A.K., Mechanical Engineering Department, Gogte Institute of Technology Udyambhag, Belguam, 590008 Karnataka State, India

Rights

Restricted Access

Relation

ISSN: 12299138

Format

Online

Language

English

Type

Article

Identifier

https://doi.org/10.1007/s12239-013-0037-8

https://www.scopus.com/inward/record.uri?eid=2-s2.0-84878476572&doi=10.1007%2fs12239-013-0037-8&partnerID=40&md5=527722da908d0d227884a30ee5a82b93