Banca de DEFESA: SUZARA RAYANNE DE CASTRO SENA

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : SUZARA RAYANNE DE CASTRO SENA
DATA : 26/08/2019
HORA: 14:00
LOCAL: AUDITÓRIO NUPEG
TÍTULO:

Evaluation of Ethyl Esters as a Gasoline Additive. 

PALAVRAS-CHAVES:

oxygenated additives; gasoline; lubricity; Otto cycle engine.

PÁGINAS: 94
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Química
RESUMO:

The objective of this study was to evaluate the application of ethyl octanoate and ethyl oleate in different concentrations as gasoline additives based on characterization analyzes, consumption in Otto cycle engine and the effect of additives on fuel lubricity. The analysis results of vapor pressure, distillation curve and corrosiveness were within the values required by Brasilian legislation. In relation to the rheological study, the Oswald de Waele model best fitted the experimental values of the gas + ester systems, which was also the model that best fitted the experimental data for pure gasoline data. Both esters increased the density of the fuel with increasing their concentration in gasoline. The results for heat of combustion of the obtained fuels were better than results reported in the literature for other oxygenated additives. Through measurements of the octane number MON (Motor Octane Number) and RON (Research octane number) it was found that the octane of the ethyl octanoate containing formulations was higher when compared to the formulations containing ethyl oleate. The lubricity tests were carried out using a HFRR (High Frequency Reciprocating Test Rig) equipment. The WSD (wear scar diameter) values have decreased as the esters proportions have increased in the samples. The percentage of lubricant film presented values above 85% for formulations with 10% and 15% ester concentration. The values of the coefficient of friction have shown a similar behaviour, they have decreased as the esters fractions have increased. The analyzes of fuel consumption were performed using a Otto cycle engine four-stroke, in which the rotation was conserved at 4400 rpm and wheel power varied from 3 kW to 12 kW, with intervals of 3 kW to obtain hourly fuel consumption curves and brake specific fuel consumption. Even esters having lower heat of combustion, hourly fuel consumption was similar to pure gasoline (type A). In relation to the brake specific fuel consumption, increasing the wheel power had a better conversion of the mass of fuel burned into energy. The results also showed that ethyl octanoate presents better characteristics to be added in gasoline when compared to ethyl oleate.

MEMBROS DA BANCA:
Interno - 2929066 - ANDRE LUIS LOPES MORIYAMA
Interna - 1543286 - CAMILA GAMBINI PEREIRA
Interno - 1308273 - EDUARDO LINS DE BARROS NETO
Externa à Instituição - ERINÉIA DA SILVA SANTOS
Externa ao Programa - 1415919 - KATHERINE CARRILHO DE OLIVEIRA
Externo à Instituição - MANOEL REGINALDO FERNANDES - UFERSA