Effects of ethanol addition to biodiesel-diesel oil blends (B7 and B20) on engine emissions and fuel consumption

Alex De Oliveira, Osmano Souza Valente, José Ricardo Sodré

Research output: Contribution to journalConference article

Abstract

This work investigates a diesel engine operating with different blends of diesel fuel, biodiesel and anhydrous ethanol. Anhydrous ethanol (99.8% purity) was added to diesel oil with 7% (B7) and 20% of biodiesel (B20), with the concentrations of 5% (E5), 10% (E10) and 15% (E15) and 20% (E20). The experiments were conducted on a naturally aspirated, four-stroke, four-cylinder, direct injection 44 kW diesel engine, operating at a constant speed of 1800 RPM and at the fixed load of 27.5 kW to attain the lowest specific fuel consumption (SFC). The results were compared with the standard B7 operation, and showed that ethanol addition (B7E5) reduced up to 7% carbon dioxide (CO2) emissions, associated with the decrease of the cylinder gas temperature, due to the ethanol high latent heat of evaporation, and to the ethanol lower carbon-to-hydrogen ratio and oxygen content. Total hydrocarbons (THC) emissions were reduced up to 14% with ethanol addition (B7E15), indicating higher fuel burn efficiency when ethanol is added to the fuel, as the oxygen available in ethanol molecule improves the burning during combustion. On the other hand, increasing biodiesel content in the fuel from 7% to 20% increased CO2 and THC emissions, both mitigated with the use of ethanol. Carbon monoxide (CO) and oxides of nitrogen (NOX) emissions showed different behavior, depending on ethanol and biodiesel concentration. Both biodiesel and ethanol increased SFC, due to the reduction of fuel lower heating value (LHV), although ethanol addition slightly increased fuel conversion efficiency.

Original languageEnglish
Pages (from-to)4005-4015
Number of pages11
JournalMRS Advances
Volume2
Issue number64
DOIs
Publication statusPublished - 1 Jan 2017

Fingerprint

fuel consumption
Biofuels
Biodiesel
Fuel consumption
engines
Oils
Ethanol
ethyl alcohol
oils
Engines
diesel engines
Hydrocarbons
Diesel engines
hydrocarbons
Gas cylinders
Nitrogen Oxides
Oxygen
diesel fuels
Latent heat
Direct injection

Keywords

  • ethanol

Cite this

De Oliveira, Alex ; Valente, Osmano Souza ; Sodré, José Ricardo. / Effects of ethanol addition to biodiesel-diesel oil blends (B7 and B20) on engine emissions and fuel consumption. In: MRS Advances. 2017 ; Vol. 2, No. 64. pp. 4005-4015.
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title = "Effects of ethanol addition to biodiesel-diesel oil blends (B7 and B20) on engine emissions and fuel consumption",
abstract = "This work investigates a diesel engine operating with different blends of diesel fuel, biodiesel and anhydrous ethanol. Anhydrous ethanol (99.8{\%} purity) was added to diesel oil with 7{\%} (B7) and 20{\%} of biodiesel (B20), with the concentrations of 5{\%} (E5), 10{\%} (E10) and 15{\%} (E15) and 20{\%} (E20). The experiments were conducted on a naturally aspirated, four-stroke, four-cylinder, direct injection 44 kW diesel engine, operating at a constant speed of 1800 RPM and at the fixed load of 27.5 kW to attain the lowest specific fuel consumption (SFC). The results were compared with the standard B7 operation, and showed that ethanol addition (B7E5) reduced up to 7{\%} carbon dioxide (CO2) emissions, associated with the decrease of the cylinder gas temperature, due to the ethanol high latent heat of evaporation, and to the ethanol lower carbon-to-hydrogen ratio and oxygen content. Total hydrocarbons (THC) emissions were reduced up to 14{\%} with ethanol addition (B7E15), indicating higher fuel burn efficiency when ethanol is added to the fuel, as the oxygen available in ethanol molecule improves the burning during combustion. On the other hand, increasing biodiesel content in the fuel from 7{\%} to 20{\%} increased CO2 and THC emissions, both mitigated with the use of ethanol. Carbon monoxide (CO) and oxides of nitrogen (NOX) emissions showed different behavior, depending on ethanol and biodiesel concentration. Both biodiesel and ethanol increased SFC, due to the reduction of fuel lower heating value (LHV), although ethanol addition slightly increased fuel conversion efficiency.",
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Effects of ethanol addition to biodiesel-diesel oil blends (B7 and B20) on engine emissions and fuel consumption. / De Oliveira, Alex; Valente, Osmano Souza; Sodré, José Ricardo.

In: MRS Advances, Vol. 2, No. 64, 01.01.2017, p. 4005-4015.

Research output: Contribution to journalConference article

TY - JOUR

T1 - Effects of ethanol addition to biodiesel-diesel oil blends (B7 and B20) on engine emissions and fuel consumption

AU - De Oliveira, Alex

AU - Valente, Osmano Souza

AU - Sodré, José Ricardo

PY - 2017/1/1

Y1 - 2017/1/1

N2 - This work investigates a diesel engine operating with different blends of diesel fuel, biodiesel and anhydrous ethanol. Anhydrous ethanol (99.8% purity) was added to diesel oil with 7% (B7) and 20% of biodiesel (B20), with the concentrations of 5% (E5), 10% (E10) and 15% (E15) and 20% (E20). The experiments were conducted on a naturally aspirated, four-stroke, four-cylinder, direct injection 44 kW diesel engine, operating at a constant speed of 1800 RPM and at the fixed load of 27.5 kW to attain the lowest specific fuel consumption (SFC). The results were compared with the standard B7 operation, and showed that ethanol addition (B7E5) reduced up to 7% carbon dioxide (CO2) emissions, associated with the decrease of the cylinder gas temperature, due to the ethanol high latent heat of evaporation, and to the ethanol lower carbon-to-hydrogen ratio and oxygen content. Total hydrocarbons (THC) emissions were reduced up to 14% with ethanol addition (B7E15), indicating higher fuel burn efficiency when ethanol is added to the fuel, as the oxygen available in ethanol molecule improves the burning during combustion. On the other hand, increasing biodiesel content in the fuel from 7% to 20% increased CO2 and THC emissions, both mitigated with the use of ethanol. Carbon monoxide (CO) and oxides of nitrogen (NOX) emissions showed different behavior, depending on ethanol and biodiesel concentration. Both biodiesel and ethanol increased SFC, due to the reduction of fuel lower heating value (LHV), although ethanol addition slightly increased fuel conversion efficiency.

AB - This work investigates a diesel engine operating with different blends of diesel fuel, biodiesel and anhydrous ethanol. Anhydrous ethanol (99.8% purity) was added to diesel oil with 7% (B7) and 20% of biodiesel (B20), with the concentrations of 5% (E5), 10% (E10) and 15% (E15) and 20% (E20). The experiments were conducted on a naturally aspirated, four-stroke, four-cylinder, direct injection 44 kW diesel engine, operating at a constant speed of 1800 RPM and at the fixed load of 27.5 kW to attain the lowest specific fuel consumption (SFC). The results were compared with the standard B7 operation, and showed that ethanol addition (B7E5) reduced up to 7% carbon dioxide (CO2) emissions, associated with the decrease of the cylinder gas temperature, due to the ethanol high latent heat of evaporation, and to the ethanol lower carbon-to-hydrogen ratio and oxygen content. Total hydrocarbons (THC) emissions were reduced up to 14% with ethanol addition (B7E15), indicating higher fuel burn efficiency when ethanol is added to the fuel, as the oxygen available in ethanol molecule improves the burning during combustion. On the other hand, increasing biodiesel content in the fuel from 7% to 20% increased CO2 and THC emissions, both mitigated with the use of ethanol. Carbon monoxide (CO) and oxides of nitrogen (NOX) emissions showed different behavior, depending on ethanol and biodiesel concentration. Both biodiesel and ethanol increased SFC, due to the reduction of fuel lower heating value (LHV), although ethanol addition slightly increased fuel conversion efficiency.

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