Avinash Kumar Agarwal 1, Tarun Gupta2, Jithin Lukose1, Akhilendra Pratap Singh1

  • 1 Engine Research Laboratory, Department of Mechanical Engineering, Indian Institute of Technology Kanpur, Kanpur – 208016, India
  • 2 Department of Civil Engineering, Indian Institute of Technology Kanpur, Kanpur 208017, India

Received: January 23, 2014
Revised: July 10, 2014
Accepted: September 14, 2014
Download Citation: ||https://doi.org/10.4209/aaqr.2014.01.0021  

  • Download: PDF


Cite this article:
Agarwal, A.K., Gupta, T., Lukose, J. and Singh, A.P. (2015). Particulate Characterization and Size Distribution in the Exhaust of a Gasoline Homogeneous Charge Compression Ignition Engine. Aerosol Air Qual. Res. 15: 504-516. https://doi.org/10.4209/aaqr.2014.01.0021


HIGHLIGHTS

  • PM mass from gasoline HCCI increases with EGR rate & decrease with λ.
  • Particle number decreases with increasing λ.
  • Particle number-size distribution increases with increasing EGR. 
  • BSOF content is found to be negligible in gasoline HCCI engines.
  • Most of the trace metals in particulates increase with EGR. 

 

ABSTRACT


Agglomeration, coagulation, surface condensation, adsorption and oxidation processes are a part of particulate evolution process and lead to significant changes in characteristics of particulate matter (PM), when they enter the atmosphere. PM formation can be significantly reduced by advanced combustion concepts such as homogeneous charge compression ignition (HCCI). In the present study, experiments were performed in a modified gasoline fuelled HCCI engine at varying intake air temperatures (Ti), exhaust gas recirculation (EGR) rates and relative air-fuel ratios (λ). For particulate characterization, a partial flow dilution tunnel was used to collect particulate samples on a filter paper. These particulate samples were analysed for benzene soluble organic fraction (BSOF), trace metals, and particulate morphology using scanning electron microscopy (SEM). Physical characterisation of particulates was done using engine exhaust particle sizer (EEPS), which measured the particle size-number distribution. In the experiments, higher PM was found for richer fuel-air mixtures and it further increased with application of EGR. Trace metals were found to be significantly lower for HCCI generated PM, which increased with increasing EGR. BSOF was negligible as compared to total PM which showed relatively lower toxicity of gasoline HCCI particulates. Total number of particles reduced with increasing λ, however particulate size-number distribution curve shifted away from accumulation mode, indicating that the particulate size decreased with increasing λ. Higher particle size-number distribution and particle size-mass distribution were observed for increasing Ti. Particulate surface area and volume also increased with increasing Ti and mixture strength.


Keywords: Gasoline HCCI; Particulate matter (PM); Benzene soluble organic fraction (BSOF); Trace metals; Particle size-number distribution


Share this article with your colleagues 

 

Subscribe to our Newsletter 

Aerosol and Air Quality Research has published over 2,000 peer-reviewed articles. Enter your email address to receive latest updates and research articles to your inbox every second week.

7.3
2022CiteScore
 
 
77st percentile
Powered by
Scopus
 
   SCImago Journal & Country Rank

2021 Impact Factor: 4.53
5-Year Impact Factor: 3.668

The Future Environment and Role of Multiple Air Pollutants

Aerosol and Air Quality Research partners with Publons

CLOCKSS system has permission to ingest, preserve, and serve this Archival Unit
CLOCKSS system has permission to ingest, preserve, and serve this Archival Unit

Aerosol and Air Quality Research (AAQR) is an independently-run non-profit journal that promotes submissions of high-quality research and strives to be one of the leading aerosol and air quality open-access journals in the world. We use cookies on this website to personalize content to improve your user experience and analyze our traffic. By using this site you agree to its use of cookies.