Study on the Effect of Oxygenated Fuels on Emissions Characteristics: A Comparative Study between Compression Ignition and Spark Ignition Engines | Chapter 5 | New Innovations in Chemistry and Biochemistry Vol. 3

 Petroleum consumption is commonly regarded as one of the most significant factors to environmental degradation. The combustion of oxygenated fuel blends in diesel and gasoline engines is explored in this study, with a special focus on emissions. The study had two objectives: first, to identify the extent to which NOx, uHC, and CO emissions are increased or decreased for various loads in BMEP; and second, to evaluate the extent to which emissions of NOx, uHC, and CO are increased or decreased for various loads in BMEP. Second, the emissions of the two engines should be compared.

In the gasoline engine, 20% methanol was blended with 80% gasoline (M20), whereas in the diesel engine, a mixture of 20% n-butanol and 80% diesel (B20) was investigated. The gasoline engine was a Suzuki RS-416 1.6L normally aspirated engine, and the diesel engine was a 1Z type, 1.9L Turbo-Direct injection engine (TDI). NOx emissions increased with increasing brake mean effective pressure (BMEP) for diesel fuel (DF), but were marginally lower than the blend B20 at 50 and 75 percent load; however, NOx emissions decreased in comparison to gasoline fuel (GF), but were four times higher than in diesel engines. When compared to the reference fuel DF, firing B20 reduced the quality of unburned hydrocarbons (uHC) emissions in diesel engines. The range of uHC emissions in the diesel engine, on the other hand, was much narrower than in the gasoline engine: 10-60 ppm and 600 to 700 ppm, respectively. Above 25 percent BMEP, M20 lowered uHc concentration more than GF. M20's carbon monoxide (CO) concentration increased more than GF's. CO emission concentrations in B20 increased in comparison to DF. All oxygenated blends, M20 and B20, had lower exhaust gas temperatures (EGT) than GF and DF.

Author(S) Details

L. Siwale
School of Engineering, The Copperbelt University, Riverside Campus, Jambo Drive, Box 21692, Kitwe, Zambia.

R. J. Kashinga
School of Engineering, The Copperbelt University, Riverside Campus, Jambo Drive, Box 21692, Kitwe, Zambia.

S. Chama
School of Engineering, The Copperbelt University, Riverside Campus, Jambo Drive, Box 21692, Kitwe, Zambia.

J. Siame
School of Mines & Mineral Sciences, The Copperbelt University, Riverside Campus, Jambo Drive, Box 21692, Kitwe, Zambia.

A. Bereczky
Department of Energy Engineering, Budapest University of Technology and Economics, H-1111 Budapest, Bertalan Lajos U. 4–6, D208, Hungary.

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