Banca de QUALIFICAÇÃO: TALITA KÊNYA OLIVEIRA COSTA

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : TALITA KÊNYA OLIVEIRA COSTA
DATE: 18/12/2020
TIME: 07:00
LOCAL: VIRTUAL
TITLE:

Transesterification of soybean oil with homogeneous catalyst using butanol to obtain biodiesel.

KEY WORDS:

Biodiesel, butanol, kinetic constants, homogeneous catalyst.

PAGES: 138
BIG AREA: Engenharias
AREA: Engenharia Química
SUMMARY:

Biodiesel is one of the alternatives in reducing environmental impacts as it is a fuel derived from renewable raw materials such as vegetable oils and animal fats. It can be obtained through the transesterification reaction between an alcohol and triglycerides in the presence or not of a catalyst, having as product an ester, which is biodiesel and glycerin. The object of study of this work was the transesterification reaction of soy oil with different alcohols, evaluating the possibility of using butanol as alcohol, using a homogeneous base catalyst (potassium hydroxide), obtaining as a result the model for reaction conversion and reaction kinetics. The transesterification reactions were carried out in a jacketed glass reactor, with a coupled condenser and a heating bath. Reactions were carried out with different alcohols, varying the alcohol: molar ratio of oil to biodiesel made with methanol, ethanol, 2-propanol and butanol, after which a factorial design 2³ was made using butanol in the reaction and with the following conditions: alcohol ratio: 4:1 to 8:1 oil, 1 to 2%, 1 to 2 hours and 65 ° C. To obtain the kinetic curve, samples of the reaction were taken between the initial time and 60 minutes. For all samples, density and viscosity were analyzed and their conversions were measured using thermogravimetric analysis and gas chromatography. In the density analysis, of the reactions of the factorial design, it varied between 889.41 kg/m³ and 850.18 kg/m³, whereas for the viscosity it varied between 11.10 cSt and 3.10 cSt. Both for density and viscosity it was seen that when increasing the conversion to ester these properties suffered a decrease in their values. For the conversion analysis, the four types of alcohol with a 10: 1 molar ratio were found: methanol 99.28%, ethanol 81.72%, 2-propanol 7.50% and butanol 49.74%. For design with butanol, the optimum point occurred with an 8:1, 2% mass ratio of catalyst, for two hours, where it obtained 76.24% conversion. With the model obtained by factorial design, it was found that the three factors analyzed were significant, with an average error between the predicted and experimental values of 2.3%. The reaction was shown to be of second order with a kinetic constant of 3x10^-5 min^-1. Thus, it can be concluded that the biodiesel produced with butanol obtained excellent conversion values making this alcohol an alternative because it comes from renewable sources and better lubricity of the fuel.

BANKING MEMBERS:
Presidente - 1308273 - EDUARDO LINS DE BARROS NETO
Externo à Instituição - FRANCISCO WENDELL BEZERRA LOPES - UnP
Externo ao Programa - 1566922 - LINDEMBERG DE JESUS NOGUEIRA DUARTE