The impact of using biodiesel/marine gas oil blends on exhaust emissions from a stationary diesel engine

Abstract

The purpose of this work was to investigate the impact of marine gas oil (MGO)/biodiesel blends on the exhaust emissions and fuel consumption in a single cylinder, stationary, diesel engine. Three different origins of biodiesel were used as the blending feedstock with the reference MGO, at proportions of 5 and 10% by volume. Methyl esters were examined according to the automotive FAME standard EN 14214. The baseline MGO and biodiesel blends were examined according to ISO 8217:2005 specifications for the DMA category. Independently of the biodiesel used, a decrease of PM, HC, CO and CO(2) emissions was observed. Emissions of NO(x) were also lower with respect to MGO. This reduction in NO(x) may be attributed to some physicochemical properties of the fuels applied, such as the higher cetane number and the lower volatility of methyl esters. Reductions in PM for biodiesel blends were lower in the exhaust than those of the reference fuel which was attributed to the oxygen content and the near absence of sulphur and aromatics compounds in biodiesel. However, a slight increase in fuel consumption was observed for the biodiesel blends that may be tolerated due to the exhaust emissions benefits. Brake thermal efficiency was also determined. Unregulated emissions were characterized by determining the soluble organic fraction content of the particulate matter.

Performance and Emission Characteristic of Distilled Technical Cashew Nut Shell Liquid Stabilized Triglyceride Biofuel

“…A similar NOx increase has been reported for SVO blends with diesel [22,25]. Published literature on SVO/diesel blends in diesel engines indicates this NOx increase is primarily due to non-uniform spraying and burning of fuel [3,22,25].…”

Influence of fuel-borne oxygen on European Stationary Cycle: Diesel engine performance and emissions with a special emphasis on particulate and NO emissions

“…Figure 13(a) exhibits CO emissions with the reference diesel and five oxygenated blends. As seen in Figure 13(a), as a whole, CO emissions are higher for higher engine loads, which are generally typical of all internal combustion engines due to decrease in air-fuel ratios with the increase in engine loads [43]. From Figure 13 Published literature [6,7,43,48] showed lower CO emissions with oxygenated fuels.…”

“…Relative to the reference diesel, the reductions in UBHC by oxygenated blends are in the range of 30-55% (Figure 12(c)). Karavalakis et al [43] reported lower UBHC emissions with methyl esters at all engine loading conditions. Nabi et al [47] claimed lower UBHC emissions with an oxygenated blend and an ester blend.…”

“…The UBHC is also a diesel engine pollutant produced from over rich fuel mixtures. The UBHC amount in the exhaust depends upon different engine operating parameters including the characteristics of fuel spray and the mixing of air and fuel spray in the combustion chamber [43]. Figure 12(a) exhibits UBHC emissions with the reference diesel and five oxygenated blends.…”

Toxicidade cardiovascular e inflamatória aguda induzida pela inalação de partículas dos combustíveis diesel e biodiesel

“…com um álcool de cadeia curta (etanol e/ou metanol) na presença de um catalisador ácido (HCL -ácido clorídrico) ou básico (NaOH -Hidróxido de sódio), obtendo como produto final o éster etílico e/ou metílico de acordo com o álcool utilizado e o subproduto glicerina que pode ser refinado mais adiante para o uso em indústrias farmacêuticas e cosméticas Graboski et al, 1998;Parente, 2003 (Di et al, 2009;Lapuerta et al, 2008b). As diferenças entre as emissões do combustível diesel e biodiesel variam dependendo do motor, combustível, condição de operação (Bunger et al, 2000a) e do tipo do óleo biodiesel utilizado (Karavalakis et al, 2008 Freitas et al, 2004;Farhat et al, 2005;Arbex et al, 2009), morbidade e mortalidade cardiovascular (Cançado et al, 2006;Cendon et al, 2006. Sendo que os eventos cardiovasculares fatais ocorrem no mesmo dia da exposição ao MP Braga et al (2001).…”