Cycle Efficiency and Gaseous Emissions from a Diesel Engine Assisted with Varying Proportions of Hydrogen and Carbon Monoxide (Synthesis Gas) Univ. of Minnesota - Twin Cities

Format:

Conference/Event

Author/Creator:

Bika, Bika, author.

Contributor:

Franklin, Luke

Kittelson, David

Conference Name:

SAE 2011 World Congress & Exhibition (2011-04-12 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2011

Summary:

This study investigates the combustion and emissions of acompression ignition (CI) engine operating with mixtures ofhydrogen (H₂) and carbon monoxide (CO) injected with the intakeair. Hydrogen and carbon monoxide were chosen as the gaseous fuels,because they represent the main fuel component of synthesis gas,which can be produced by a variety of methods and feed stocks.However, due to varying feed stock and production mechanisms,syngas composition can vary significantly. It is currently unknownhow a varying H₂/CO (syngas) ratio affects the cycle efficiency andgaseous emissions. The experiments were performed on an air-cooled,naturally aspirated, direct injection diesel engine. The engine wasoperated at 1800 RPM with a compression ratio of 21.2:1. Two loadconditions were tested; 2 bar and 4 bar net indicated meaneffective pressure (IMEP).For all test conditions the added syngas demonstrated lowercycle efficiency than the diesel fuel baseline. The lower cycleefficiency is thought to directly come from the amount of unburnedsyngas escaping with the exhaust gases. For the 2 bar IMEPncondition the NOx emissions remained relatively constantfor all conditions tested, however for the 4 bar IMEP condition,the NOx emissions increased with diesel fuelsubstitution for all H₂/CO proportions. The NO₂/NOxratio was found to significantly increase for all conditionstested, compared to the diesel base case. It is speculated thatthis increase is caused by the increase in HO₂ radicals whichincreases the NO to NO₂ conversion

Notes:

Vendor supplied data

Publisher Number:

2011-01-1194

Access Restriction:

Restricted for use by site license