Experimental investigation on combustion and unregulated emission characteristics of butanol-isomer/gasoline blends

Effects of butanol isomers on characteristics of combustion and emission were studied on PFI SI engine. Experiments were operated under the condition of 3 and 5 bar brake mean effective pressure (BMEP) engine loads and different equivalence ratios ( φ =0.83−1.25) with engine speed of 1200 r/min usin...

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Bibliographic Details
Published in:Journal of Central South University 2019-08, Vol.26 (8), p.2244-2258
Main Authors: Li, Yuan-xu, Ning, Zhi, Yan, Jun-hao, Lee, Timothy H, Lee, Chia-fon F
Format: Article
Language:English
Subjects:
Acetaldehyde
Benzene
Brakes
Butadiene
Butanol
Combustion
Cylinders
Emission analysis
Engineering
Ethylbenzene
Gasoline
Isomers
Metallic Materials
Peak pressure
Polymer blends
Spark ignition
Thermodynamic efficiency
Toluene
Xylene
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Summary:Effects of butanol isomers on characteristics of combustion and emission were studied on PFI SI engine. Experiments were operated under the condition of 3 and 5 bar brake mean effective pressure (BMEP) engine loads and different equivalence ratios ( φ =0.83−1.25) with engine speed of 1200 r/min using blends made of 70 vol.% gasoline and 30 vol.% butanol isomers (N30, S30, I30 and T30). The results indicated that compared with gasoline, all butanol isomer blends have higher cylinder pressure. N30 has the highest and most advanced peak pressure, and T30 shows a higher brake specific fuel consumption (BSFC) and lower brake thermal efficiency (BTE). N30 presents a lower UHC emissions and I30 has slightly higher CO emissions than other blends. For unregulated emissions, compared with gasoline, butanol isomer blends have higher acetaldehyde, and N30 produces a higher emission of 1,3-butadiene than other blends. A reduction in benzene, toluene, ethylbenzene and xylene (BTEX) has been found with butanol isomer blends.
ISSN:2095-2899
2227-5223
DOI:10.1007/s11771-019-4170-z