Publication

Experimental Results and Modelling of Carbon Monoxide Emissions from a Natural Gas Fuelled Spark-Ignition Cogeneration Engine

Daniel Favrat
2000
Conference Papers

Abstract

In order to determine the origin of the CO emissions from a cogeneration spark ignition engine fuelled with a lean natural gas-air mixture, the influence of several combustion chamber parameters have been measured in detail. In an attempt to interpret the experimental results, the engine process was simulated to dissociate the contribution of the bulk gas combustion kinetics from the crevice hydrocarbon burn-up or other sources. Modelling of CO kinetics in the bulk gas leads to the conclusion that although CO kinetics result in above equilibrium values of CO at exhaust valve opening, these values account for only approximately 5 to 10% of the concentrations measured in the exhaust gas.

Official source

https://infoscience.epfl.ch/entities/publication/5ef01f5b-946e-4345-9202-a0db2a3f9750

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Daniel Favrat
2000
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/5ef01f5b-946e-4345-9202-a0db2a3f9750

About this result

Related concepts (31)

Exhaust gas

Exhaust gas or flue gas is emitted as a result of the combustion of fuels such as natural gas, gasoline (petrol), diesel fuel, fuel oil, biodiesel blends, or coal. According to the type of engine, it is discharged into the atmosphere through an exhaust pipe, flue gas stack, or propelling nozzle. It often disperses downwind in a pattern called an exhaust plume. It is a major component of motor vehicle emissions (and from stationary internal combustion engines), which can also include crankcase blow-by and evaporation of unused gasoline.

Diesel exhaust

Diesel exhaust is the gaseous exhaust produced by a diesel type of internal combustion engine, plus any contained particulates. Its composition may vary with the fuel type or rate of consumption, or speed of engine operation (e.g., idling or at speed or under load), and whether the engine is in an on-road vehicle, farm vehicle, locomotive, marine vessel, or stationary generator or other application. Diesel exhaust is a Group 1 carcinogen, which causes lung cancer and has a positive association with bladder cancer.

Exhaust gas recirculation

In internal combustion engines, exhaust gas recirculation (EGR) is a nitrogen oxide () emissions reduction technique used in petrol/gasoline, diesel engines and some hydrogen engines. EGR works by recirculating a portion of an engine's exhaust gas back to the engine cylinders. The exhaust gas displaces atmospheric air and reduces in the combustion chamber. Reducing the amount of oxygen reduces the amount of fuel that can burn in the cylinder thereby reducing peak in-cylinder temperatures.

Related publications (3)

Experimental Results and Modelling of Carbon Monoxide Emissions from a Natural Gas Fuelled Spark-Ignition Cogeneration Engine

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