Diesel and rapeseed methyl ester (RME) pilot fuels for hydrogen and natural gas dual-fuel combustion in compression–ignition engines

Korakianitis, Theodosios; Namasivayam, A.M.; Crookes, Roy J.

doi:10.1016/j.fuel.2011.03.005

Cited by 107 publications

(30 citation statements)

References 45 publications

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“…At the same time, a significant decrease in soot emissions under dual fuel operation has also been reported [3]. On the other hand, CO and HC emissions levels have been reported to be considerably higher when compared to normal diesel operation [7,[10][11][12]19].…”

Section: Introductionmentioning

confidence: 99%

“…The peak compression temperatures calculated in this manner are 837 K for air and 750 K for the stoichiometric methane/air mixture. As analyzed above, the presence of natural gas reduces the peak temperature by 100 K and the adiabatic flame temperature by 500 K The higher specific heat capacity ratio of natural gas lowers incylinder charge temperature and increases ignition delay compared to the baseline diesel operation and hence is critical from an emissions perspective [10,11]. Due to these competing factors dual fueling with natural gas needs to be investigated across a wider range of engine operating conditions to assess the affect of engine speed and load (power output) in addition to the above mentioned factors.…”

Section: Introductionmentioning

confidence: 99%

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Natural gas fueled compression ignition engine performance and emissions maps with diesel and RME pilot fuels

et al. 2014

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h i g h l i g h t sCompression ignition engine fueled with manifold injected natural gas. Engine operated under dual fueling mode with diesel and RME examined as pilot fuels. Emissions maps presented for specific emissions of CO 2 , HC and NO X . Novel method of presentation for the comparison of data collected from dual fueled CI engine. Engine efficiency for a dual fueled engine examined across entire range of operation. a r t i c l e i n f o Keywords: Contours Performance maps Natural gas Diesel RME Combustion a b s t r a c t When natural gas is port/manifold injected into a compression ignition engine, the mixture of air and the natural gas is compressed during the compression stroke of the engine. Due to the difference in the values of specific heat capacity ratio between air and natural gas, the temperature and pressure at the time of pilot fuel injection are different when compared to a case where only air is compressed. Also, the presence of natural gas affects the peak in-cylinder (adiabatic flame) temperature. This significantly affects the performance as well as emissions characteristics of natural gas based dual fueling in CI engine. Natural gas has been extensively tested in a single cylinder compression ignition engine to obtain performance and emissions maps.Two pilot fuels, diesel and RME, have been used to pilot natural gas combustion. The performance of the two liquid fuels used as pilots has also been assessed and compared. Tests were conducted at 48 different operating conditions (six different speeds and eight different power output conditions for each speed) for single fueling cases. Both the diesel and RME based single fueling cases were used as baselines to compare the natural gas based dual fueling where data was collected at 36 operating conditions (six different speeds and six different power output conditions for each speed). Performance and emissions characteristics were mapped on speed vs brake power plots. The thermal efficiency values of the natural gas dual fueling were lower when compared to the respective pilot fuel based single fueling apart from the highest powers. The effect of engine speed on volumetric efficiency in case of the natural gas based dual fueling was significantly different from what was observed with the single fueling. Contours of specific NO X for diesel and RME based single fueling differ significantly when these fuels were used to pilot natural gas combustion. For both of the single fueling cases, maximum specific NO X were centered at the intersection of medium speeds and medium powers and they decrease in all directions from this region of maximum values. On the other hand, an opposite trend was observed with dual fueling cases where minimum specific NO X were observed at the center of the map and they increase in all direction from this region of minimum NO X . RME piloted specific NO X at the highest speeds were the only exception to this trend. Higher specific HC and lower specific CO 2 emissions were observed in case of natural gas based dual fueling...

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Natural gas fueled compression ignition engine performance and emissions maps with diesel and RME pilot fuels

et al. 2014

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“…At pressure of 225bar, the NOx emissions were 802.1 ppm, 890 ppm, 952.16 ppm, 1020.12 ppm and 1103.52 ppm for base line fuel, dual biodiesel blends of diesel, emulsified fuel with 4lpm, 6lpm, and 8lpm of H2 induction, respectively. But this could be potentially established by the use of EGR technique and emulsified biodiesel as presented by Korakianitis et al [34]. Nevertheless, a contrary trend was also observed by other researchers who claimed that the NOx emissions were smaller for dual fuel combustion, particularly at medium and high engine loads, and they attributed it to the combined effects of hydrogen incantation and late pilot fuel injection, that contributed to low temperature combustion [35,36].…”

Section: Oxides Of Nitrogen (Nox) Emissionmentioning

confidence: 90%

Analysis of hydrogen enriched treble biofuel blended with diesel for performance, emission and combustion characteristics on CI engine

Fakhruddin¹,

Ali²,

Hussain³

2017

Int. J. Automot. Mech. Eng.

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The need of the hour is to look forward to alternative fuels to swipe out the dependence on fossil fuels, as biofuels from various feedstocks are being experimented worldwide. However, it is difficult to implement biodiesel from a single feedstock to replace the existing fossil fuels. It is reliable to obtain biodiesel from local feedstock and to make multiple biodiesel mixtures blended with diesel. The present work relies more on biofuels and acts as a step towards fossil fuel-free engine or at least to snatch the lion's share of the fossil fuels. In this contest, the experiment was carried out by using treble biofuels i.e., WCOBD + PSBD + Bio-hydrogen at different injection pressures (i.e., 200bar, 225bar and 250bar) and compared them with a similar engine that utilised fossil fuel as the stand-alone fuel. The mixture ratios were B10, B20 and B30 and the enrichment of hydrogen was done at 4lpm, 6lpm and 8lpm. The results showed that the brake thermal efficiency of dual biofuel blended diesel decreased as compared to that of the base fuel and increased with hydrogen enriched biodiesel. Hence, the brake specific energy consumption decreased for the hydrogen enriched fuel and the exhaust emissions of CO and CO2 were reduced, however, NOx showed an increasing trend as usual.

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“…Se han realizado investigaciones en donde se mezcló diesel o biodiesel (Kleinová et al, 2011) con combustibles gaseosos como: gas natural, biogás, GLP, hidrógeno (Korakianitis et al, 2011), acetileno (Lakshmanan y Nagarajan, 2011), según los tipos de combustibles utilizados en el motor y sus composiciones se obtuvo diferentes tasas de sustitución de combustible líquido por gaseoso y diferentes niveles de emisiones que en la mayoría de los casos son menores que las de la operación del equipo con solo diesel.…”

Section: Investigación Realizada a Motores Operando Con Sistema Dual-unclassified

Comportamiento de un motor diesel de 1.105 hp operado mediante el sistema dual-fuel con diesel - gas natural en campos petroleros

2014

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Comportamiento de un motor diesel de 1.105 hp operado mediante el sistema dual-fuel con diesel -gas natural en campos petroleros ResumenSe describe el sistema dual-fuel para motores diesel, operando los motores de combustión interna, donde sustituyeron parte del combustible con gas natural u otro combustible gaseoso. El sistema permite un ahorro económico significativo por la diferencia de precio entre el diesel y el gas natural, la disponibilidad de gas en sitio y la disminución en la emisión de gases contaminantes de la atmósfera debido a las bondades que presenta el gas natural frente al diesel. Se presentan los resultados de las pruebas realizadas a motores, y se indica la manera de aprovechar la tecnología dual-fuel en la industria petrolera.Palabras clave: dual-fuel; motor diesel-gas natural; ahorro diesel; sustitución diesel por gas natural. AbstractThe dual-fuel system for diesel engines is described, which consists in substituting part of the fuel used by the internal combustion engine with natural gas or another gaseous fuel. This system allows significant savings in costs due to differences in the prices of diesel and natural gas, the on-site availability of gas, and the reduction in polluting gas emissions to the atmosphere attributable to the positive aspects of natural gas versus diesel fuel. The results of tests carried out on the dual-fuel engine are presented, and the best way to use this technology in the oil industry is indicated.

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Diesel and rapeseed methyl ester (RME) pilot fuels for hydrogen and natural gas dual-fuel combustion in compression–ignition engines

Cited by 107 publications

References 45 publications

Natural gas fueled compression ignition engine performance and emissions maps with diesel and RME pilot fuels

Natural gas fueled compression ignition engine performance and emissions maps with diesel and RME pilot fuels

Analysis of hydrogen enriched treble biofuel blended with diesel for performance, emission and combustion characteristics on CI engine

Comportamiento de un motor diesel de 1.105 hp operado mediante el sistema dual-fuel con diesel - gas natural en campos petroleros

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