Effect of Syngas Composition on the Combustion and Emissions Characteristics of a Syngas/Diesel RCCI Engine

Navid Kousheshi, Mortaza Yari, Amin Paykani, Ali Saberi Mehr and German F. de la Fuente
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Navid Kousheshi: Faculty of Mechanical Engineering, University of Tabriz, Tabriz 5166616471, Iran
Mortaza Yari: Faculty of Mechanical Engineering, University of Tabriz, Tabriz 5166616471, Iran
Amin Paykani: School of Engineering and Computer Science, University of Hertfordshire, Hatfield AL10 9AB, UK
Ali Saberi Mehr: Faculty of Mechanical Engineering, University of Bonab, Bonab 5551761167, Iran
German F. de la Fuente: Instituto de Ciencia de Materiales de Aragón (Universidad de Zaragoza-CSIC), María de Luna 3, 50018 Zaragoza, Spain

Energies, 2020, vol. 13, issue 1, 1-19

Abstract: Reactivity controlled compression ignition (RCCI) strategy uses two different fuels with different reactivities which provides more control over the combustion process and has the potential to dramatically lower combustion temperature and NO X and PM emissions. The objective of the present study is to numerically investigate the impact of syngas composition on the combustion and emissions characteristics of an RCCI engine operating with syngas/diesel at constant energy per cycle. For this purpose, different syngas compositions produced through gasification process have been chosen for comparison with the simulated syngas (mixture of hydrogen and carbon monoxide). The results obtained indicate that using syngas results in more soot, CO and UHC emissions compared with simulated syngas. Even though more NO X reduction can be achieved while operating with syngas, the engine could suffer from poor combustion and misfire at low loads due to the presence of nitrogen in the mixture. In terms of exergy, both syngas mixtures lead to more exergy destruction by the increase of syngas substitution. Nevertheless, the magnitude of exergy destruction for simulated syngas is less than the normal syngas.

Keywords: RCCI engine; syngas; combustion; emissions; exergy (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2020
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (7)

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