Experimental investigation on the potential of biogas/ethanol dual-fuel spark-ignition engine for power generation: Combustion, performance and pollutant emission analysis

Roberto Berlini Rodrigues da Costa, Ramón Molina Valle, Juan J. Hernández, Augusto César Teixeira Malaquias, Christian J.R. Coronado and Fabrício José Pacheco Pujatti

Applied Energy, 2020, vol. 261, issue C, No S0306261919321269

Abstract: Dual-fuel mode in internal combustion engines has been proved as a potential technique for either achieving near-zero pollutant emissions through fuel reactivity modifications or reducing carbon dioxide (CO2) emissions by partially replacing a fossil fuel by a renewable one. This manuscript presents an experimental study of a dual-fuel engine fueled with two biofuels, biogas and bioethanol, for two liquid fuel replacements of 20 and 50% by energy. Tests were performed in a spark-ignition single-cylinder engine with a modified compression ratio, under different engine speeds (1800 and 3600 rpm) and loads (4 bar of IMEP and full load condition). Results show that dual-fuel mode accelerated the combustion rate when compared to biogas single-fuel operation and increased combustion completeness, leading to reduced carbon monoxide (CO) and unburnt hydrocarbon (HC) pollutant emissions, thus, improving combustion efficiency. At full load conditions, dual-fuel mode suppressed knock occurrence and raised the load limit for 20% biogas energy fraction when compared to ethanol single-fuel condition. Moreover, nitrogen oxides (NOx) emissions were decreased in dual-fuel mode (comparing to ethanol) and fuel conversion efficiencies enhanced considerably. The innovative approach of combining two promising renewable fuels proved to be a very effective methodology in reducing exhaust pollutant emissions and increase engine overall efficiency.

Keywords: Dual-fuel combustion; Biogas; Bioethanol; SI engine (search for similar items in EconPapers)
Date: 2020
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Citations: View citations in EconPapers (12)

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DOI: 10.1016/j.apenergy.2019.114438

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