Browse Publications Technical Papers 2003-01-1770
2003-05-19

Combustion Chamber Deposits and PAH Formation in SI Engines Fueled by Producer Gas from Biomass Gasification 2003-01-1770

Investigations were made concerning the formation of combustion chamber deposits (CCD) in SI gas engines fueled by producer gas. The main objective was to determine and characterise CCD and PAH formation caused by the presence of the light tar compounds phenol and guaiacol in producer gas from an updraft gasifier. The work was based on previous work regarding the assumption that phenol is a soot precursor and therefore could lead to CCD formation.
Laboratory experiments were conducted, where pyrolysis products of the single tar components were collected on small aluminium plates. The experiments showed that guaiacol formed significant amount of deposits. The structure observed was a lacquer type of deposit. It was determined that there was no distinct deposit formation due to phenol.
Experiments were conducted with a 0.48 litre one-cylinder high compression ratio SI engine fueled by synthetic producer gas. Known quantities of tar compounds were added to the fuel gas and the CCD were examined. The experiments showed significant formation of deposits when guaiacol was added to the fuel, whereas for phenol only minor CCD formation was observed.
Particulate matter in the exhaust gas was sampled on filters and a sorbent was used for collection of vapour phase aromatic compounds. The filters and sorbent were analysed for polycyclic aromatic hydrocarbons (PAH) formed during combustion. The measurements showed that there was no significant increase in particulate PAH emissions due to the tar compounds in the fuel gas.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Preview Document Add to Cart
Members save up to 16% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
TECHNICAL PAPER

Improvement of SI Engine Operating Range by Residual Gas Sweeping from the Spark Plug Vicinity

982619

View Details

TECHNICAL PAPER

Investigation of Spray-Bowl Interaction Using Two-Part Analysis in a Direct-Injection Diesel Engine

2010-01-0182

View Details

TECHNICAL PAPER

Evaluation of a Concept for DI Gasoline Combustion Using Enhanced Gas Motion

980152

View Details

X