Portait of Anders Gudmundsson. Photo: Kennet Ruona

Anders Gudmundsson

Professor

Portait of Anders Gudmundsson. Photo: Kennet Ruona

Exhaust PM Emissions Analysis of Alcohol Fueled Heavy-Duty Engine Utilizing PPC

Author

  • Sam Shamun
  • Mengqin Shen
  • Bengt Johansson
  • Martin Tunér
  • Joakim Pagels
  • Anders Gudmundsson
  • Per Tunestål

Summary, in English

The focus has recently been directed towards the engine out soot from Diesel engines. Running an engine in PPC (Partially Premixed Combustion) mode has a proven tendency of reducing these emissions significantly. In addition to combustion strategy, several studies have suggested that using alcohol fuels aid in reducing soot emissions to ultra-low levels. This study analyzes and compares the characteristics of PM emissions from naphtha gasoline PPC, ethanol PPC, methanol PPC and methanol diffusion combustion in terms of soot mass concentration, number concentration and particle size distribution in a single cylinder Scania D13 engine, while varying the intake O2. Intake temperature and injection pressure sweeps were also conducted. The fuels emitting the highest mass concentration of particles (Micro Soot Sensor) were gasoline and methanol followed by ethanol. The two alcohols tested emitted nucleation mode particles only, whereas gasoline emitted accumulation mode particles as well. Regarding soot mass concentration measurements; methanol never exceeded 1.6 mg/m3 while when operating on gasoline this value never descended below 1.6 mg/m3. From this result it can be concluded that the main contributor to PM mass emissions is mainly increasing CMD (Count Mean Diameter) in the accumulation mode size range, but can in diffusion combustion also be caused by a high amount of nucleation mode particles. A probable cause of higher particle number emissions, when running the engine on methanol compared to ethanol, is the corrosiveness of the fuel itself. Except for the ultra-low PM mass emitted from alcohol combustion, it is also possible to alter the EGR concentration with a higher level of freedom without having to consider the NOX - soot tradeoff.

Department/s

  • Combustion Engines
  • Department of Energy Sciences
  • Ergonomics and Aerosol Technology
  • The Competence Centre for Combustion Processes
  • MERGE - ModElling the Regional and Global Earth system

Publishing year

2016-10-17

Language

English

Pages

2142-2152

Publication/Series

SAE International Journal of Engines

Volume

9

Issue

4

Document type

Journal article

Publisher

SAE

Topic

  • Energy Engineering

Conference name

SAE Powertrains, Fuels & Lubricants Meeting, 2016<br/>

Conference date

2016-10-24 - 2016-10-27

Conference place

Baltimore, United States

Status

Published

Project

  • Characterization of the Combustion of Light Alcohols in CI Engines: Performance, Combustion Characteristics and Emissions

ISBN/ISSN/Other

  • ISSN: 1946-3936