This content is not included in
your SAE MOBILUS subscription, or you are not logged in.
Influence of the Molecular Structure of Hydrocarbon Fuels on Diesel Exhaust Emissions
Annotation ability available
Sector:
Language:
English
Abstract
The influence of the molecular structure of hydrocarbon fuels on soot, SOF, and NOx emissions from a diesel engine was analyzed while ignition delay and other physical fuel properties were kept constant. Mixtures of normal paraffin (n-tetradecane) and iso-paraffin (heptamethylnonane) were used as a base fuel and one of 5 kinds of hydrocarbons including mono-aromatic, di-aromatic, and non-aromatic was added. The aromatic content varied in the range of 0-60 vol % for the mono-aromatic fuels and 0-40 vol % for the di-aromatic fuels. The experimental results showed that regardless of the molecular structure of the fuel, both particulate and NOx emissions increased linearly with the C/H atomic ratio of the fuels under constant ignition lag. The increase in particulate emissions with C/H atomic ratio was caused by increases in dry soot. The SOF, THC, and BSEC were little affected by the C/H atomic ratio and molecular structure of the fuels. The fuel properties discussed here showed similar results in both DI and IDI engines.
Recommended Content
| Technical Paper | The ABCs of Engine Exhaust Emissions |
| Technical Paper | Particulate Matter Associated with Vehicles on the Road |
| Technical Paper | “Future” Diesel Fuel Compositions - Their Influence on Particulates |
Authors
Citation
Miyamoto, N., Ogawa, H., Shibuya, M., Arai, K. et al., "Influence of the Molecular Structure of Hydrocarbon Fuels on Diesel Exhaust Emissions," SAE Technical Paper 940676, 1994, https://doi.org/10.4271/940676.Also In
References
- Wall, J.C. Hoekman, S.K. “Fuel Composition Effects on Heavy duty Diesel Particulate Emissions” SAE Paper, 841364
- Weidmann, K Menrad, H. “Diesel Fuel Quality Effects on Exhaust Emissions” SAE Paper 881649
- Mac Millan, M.L. Halsall, R. “Fuel Effects on Combustion and Emissions in Direct Injection Diesel Engine” SAE Paper 881650
- Ikegami, M. Yoshihara, Y Li, X. Inagaki, H. “A Study of Soluble Organic Fractions in Particulates Emitted from a High Speed Direct Injection Diesel Engine” SAE Paper, 890465
- Fukuda, M. Tree, D. R. Foster, D. E. Suhre, R. “The Effects of Aromatic Structure and Content on Direct Injection Diesel Engine Particulates” SAE Paper, 920110
- Miyamoto, N. Ogawa, H. Shibuya, M. “Distinguishing the Effects of Aromatic Content and Ignitability of Fuels in Diesel Combustion and Emissions” SAE Paper, 912355
- Miyamoto, N. Ogawa, H. Shibuya, M. “Description of Diesel Emissions by Individual Fuel Properties” SAE Paper, 922221
- Yamane, K. Chikahisa, T. Murayama, T. Miyamoto, N. “Measurement of particulate and Unburnt Hydrocarbon Emissions from Diesel Combustion and Emissions” SAE Paper, 880343
- Bachmaier, F. Eberius, K.H. Just, T.H. “The Formation of Nitric Oxide and the Detection of HCN in Premixed Hydrocarbon - Air Flames at 1 Atmosphere” Comb. Sci & Tech. 1973 77