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Effects on diesel combustion of the molecular structure of potential synthetic bio-fuel molecules
ISSN: 0148-7191, e-ISSN: 2688-3627
Published September 16, 2007 by Consiglio Nazionale delle Ricerche in Italy
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Synthetic bio-fuels, which can be obtained through the gasification of biomass into synthesis gas and the subsequent catalytic reaction of the synthesis gas into liquid fuel molecules, could play a key-role in providing a sustainable source of automotive fuels during the coming decades. This paper presents an attempt to understand the effect of molecular structure of potential oxygenated synthetic bio-fuel molecules of different structure on the diesel combustion process in both stratified and homogeneous combustion modes. Specifically, the effects of molecular structure on the energy release rates, gaseous exhaust emissions and the sub-micron particulate matter distribution were examined. The experiments were carried out on a single-cylinder direct-injection diesel engine using a specially adapted common-rail fuel-system which allowed the injection of small single-molecule fuel samples at high pressure. It was found that significant differences exist in the combustion characteristics of various molecules of the same molecular weight and atomic make-up. Substantial differences in ignition characteristics as well as detailed effects of molecular structure on pollutant formation and sub-micron particulate matter were observed.
CitationSchönborn, A., Ladommatos, N., Williams, J., Allan, R. et al., "Effects on diesel combustion of the molecular structure of potential synthetic bio-fuel molecules," SAE Technical Paper 2007-24-0125, 2007, https://doi.org/10.4271/2007-24-0125.
- Fischer, F., and Bahr, H. A., Gesam. Abhandl. Kenntnis der Kohle, 8, 225 (1929).
- Bridgwater, A.V., 2003. Renewable fuels and chemicals by processing of biomass. Chem. Eng. J. 91 (2-3), 87-102.
- Snelling, J., Curtis, C. W., Park, Y.K., Synthesis of higher carbon ethers from olefins and alcohols I. reactions with methanol, Fuel proc. tech. 83 (2003) 219-234
- Hu, J., Wang, Y., Cao, C., Elliott, C., Stevens, D. J., White, J. F., Conversion of biomass-derived syngas to alcohols and C2 oxygenates using supported Rh catalysts in a microchannel reactor, Catalysis Today 120 (2007) 90-95
- Qiu, X. Q., Tsubaki, N., Fujimoto, K., Zhu, Q. M., Oxygenate synthesis from 1-hexene and syngas over supported cobalt catalysts, Fuel proc. tech. 85 (2004) 1193-1200
- Ogawa, T., Inoue, N., Shikada, T., Ohno, Y., Direct dimethyl ether synthesis, Journal of Natural gas Chemistry, 12(2003)219-227
- Olah, G. A., Molnár, Á., Hydrocarbon chemistry, second edition, John Wiley and Sons Inc., 2003, ISBN 0-471-41782-3
- Heywood, J.B. Internal combustion engine fundamentals. pp. 622-623, New York: McGraw-Hill; 1988
- Ladommatos N., Rubenstein P., Bennett P., Some effects of molecular structure of single hydrocarbons on sooting tendency, Fuel, V75, Number 2, (1996), 114-124
- British standard, BS EN 590:2004, Automotive fuels - Diesel - Requirements and test methods, 2004
- Herman, R. G., Advances in catytic synthesis and utilization of higher alcohols, Catalysis today 55, pp. 233-245, (2000)
- Abou-Rachid, H., Bonneviot, L., Xu, G., Kaliaguine, S., On the correlation between kinetic rate constants in the auto-ignition process of some oxygenates and their cetane number: a quantum chemical study, Journal of molecular structure (Theochem) 621 (2003), pp.293-304
- Sivebaek, I. M., Jakobsen, J., The viscosity of dimethyl ether, Tribology international 40 (2007), pp.652-658
- Park, K., Cao, F., Kittelson, D. B., & McMurry, P. H. (2003). Relationship between particle mass and mobility for diesel exhaust particles. Environmental Science & Technology, 37, 577-583.
- Murphy, M. J., Taylor, J. D., McCormick, R. L., Compendium of experimental cetane number data, NREL-SR540-36805, September 2004
- Hallgren, B. E., Heywood, J. B., Effects of oxygenated fuels on DI diesel combustion and emissions. SAE Paper 2001-01-0648, 2001
- Tree, D. R., Svensson, K. I., Soot processes in compression ignition engines, Progress in energy and combustion Science 33 (2007) 272-309