Technical Paper
Cycle Efficiency and Gaseous Emissions from a Diesel Engine Assisted with Varying Proportions of Hydrogen and Carbon Monoxide (Synthesis Gas)
2011-04-12
2011-01-1194
This study investigates the combustion and emissions of a compression ignition (CI) engine operating with mixtures of hydrogen (H₂) and carbon monoxide (CO) injected with the intake air. 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 unknown how a varying H₂/CO (syngas) ratio affects the cycle efficiency and gaseous emissions. The experiments were performed on an air-cooled, naturally aspirated, direct injection diesel engine. The engine was operated at 1800 RPM with a compression ratio of 21.2:1. Two load conditions were tested; 2 bar and 4 bar net indicated mean effective pressure (IMEPⁿ). For all test conditions the added syngas demonstrated lower cycle efficiency than the diesel fuel baseline.
