Complementing syngas with natural gas in spark ignition engines for power production

effects on emissions and combustion

Carlo Caligiuri (Author), Urban Žvar Baškovič (Author), Massimiliano Renzi (Author), Tine Seljak (Author), Samuel Rodman Oprešnik (Author), Marco Baratieri (Author), Tomaž Katrašnik (Author)

Abstract

Power generation units based on the bio-syngas system face two main challenges due to (i) the possible temporary shortage of primary sources and (ii) the engine power derating associated with the use of low-energy density fuels in combustion engines. In both cases, an external input fuel is provided. Hence, complementing syngas with traditional fuels, like natural gas, becomes a necessity. In this work, an experimental methodology is proposed, aiming at the quantification of the impact of the use of both natural gas and syngas in spark ignition (SI) engines on performance and emissions. The main research questions focus on investigating brake thermal efficiency (BTE), power derating, and pollutant emission (NOx, CO, THC, CO2) formation, offering quantitative findings that present the basis for engine optimization procedures. Experimental measurements were performed on a Toyota 4Y-E engine (a 4-cylinders, 4-stroke spark ignition engine) at partial load (10 kW) under different syngas energy shares (SES) and at four different spark ignition timings (10°, 25°, 35° and 45° BTDC). Results reveal that the impact of the different fuel mixtures on BTE is negligible if compared to the influence of spark advance variation on BTE. On the other hand, power derating has proven to be a limiting factor and becomes more prominent with increasing SES. An increasing SES also resulted in an increase of CO and CO2 emissions, while NOx and THC emissions decreased with increasing SES.

Keywords

spark ignition engines;renewable fuels;combustion;syngas;natural gas;

Data

Language:	English
Year of publishing:	2021
Typology:	1.01 - Original Scientific Article
Organization:	UL FS - Faculty of Mechanical Engineering
UDC:	621.43:662.767
COBISS:	68666115
ISSN:	1996-1073
Views:	278
Downloads:	62
Average score:	0 (0 votes)
Metadata:

Other data

Secondary language:	Slovenian
Secondary keywords:	motorji s prisilnim vžigom;obnovljiva goriva;zgorevanje;sintezni plin;zemljski plin;
Type (COBISS):	Article
Pages:	str. 1-18
Volume:	ǂVol. ǂ14
Issue:	ǂiss. ǂ12
Chronology:	Jun. 2021
DOI:	10.3390/en14123688
ID:	13085159