Banca de QUALIFICAÇÃO: SUZARA RAYANNE DE CASTRO SENA

Uma banca de QUALIFICAÇÃO de DOUTORADO foi cadastrada pelo programa.
DISCENTE : SUZARA RAYANNE DE CASTRO SENA
DATA : 02/08/2019
HORA: 09:00
LOCAL: Auditório do NUPEG
TÍTULO:

Evaluation of the Use of Ethyl Esters as a Gasoline Additive

PALAVRAS-CHAVES:

oxygenated additives, gasoline; lubricity; consumption.

PÁGINAS: 93
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 values required by the legislation. In relation to the rheological study, the Oswald de Waele model best fit the experimental values of the gas + ester systems, which was also the model that best fit the experimental pure gasoline data. Both esters increased the density by increasing their concentration in gasoline. The results obtained for heat of combustion of the fuels were better than results in the literature for other oxygenated additives. The octane rates of MON (Motor Octane Number) when ethyl octanoate was added to gasoline increased the octane of the fuel. The lubricity tests were carried out using a HFRR (High Frequency Reciprocating Test Rig) equipment. The WSD 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 engine Branco 4-stroke and 2-cylinder, 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 consumption curves and brake specific fuel consumption. Even esters having lower heat of combustion, hourly 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.

 

MEMBROS DA BANCA:
Presidente - 1543286 - CAMILA GAMBINI PEREIRA
Interno - 1308273 - EDUARDO LINS DE BARROS NETO
Externa à Instituição - ERINÉIA DA SILVA SANTOS
Externa à Instituição - KATHERINE CARRILHO DE OLIVEIRA
Externo à Instituição - MANOEL REGINALDO FERNANDES - UFERSA
Externa ao Programa - 214.141.303-68 - MARIA CARLENISE PAIVA DE ALENCAR MOURA - UFRN