Análise da influência da temperatura e do tempo na transesterificação direta da Nannochloropsis oculata para produção de biodisel

• Ano de defesa: 2018
• Autor(a) principal: Galina, Daiana
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Federal do Espírito Santo; BR; Mestrado em Energia; UFES; Programa de Pós-Graduação em Energia
• Palavras-chave em Português: Direct transesterification; Transesterificação direta; Nannochloropsis oculata; Biodiesel; Microalga; Engenharia/Tecnologia/Gestão; 620.9
• Link de acesso: http://repositorio.ufes.br/handle/10/10604

Biofuels have several advantages, having the biodiesel a great potential to replace petroleum diesel. Although biodiesel produced from microalgae has several environmental advantages, it presents difficulties to be implemented in the energy matrix of several countries due to its high cost associated to the many stages of the production process. In this way, studies of improvement, or even elimination, of some stages of production are necessary in order to make this process economically viable. The present study has as main objective to analyze the influence of temperature and time variables on biodiesel production through direct transesterification of microalgae biomass of the species Nannochloropsis oculata, identifying the conditions that provide maximum yield of the extract rich in biodiesel. The microalgae were cultured in the laboratory, followed by the extraction and drying of the biomass. The direct transesterification of the microalgal biomass was carried out following the factorial design 32 , whose response variable was the mass yield of the biodiesel rich extract. The higher yield biodiesel was quantitatively characterized in terms of acidity index and qualitatively by Fourier Transform Infrared Spectroscopy (FTIR). By means of the experimental method carried out in the present study, it was possible to cultivate microalgae of the species Nannochloropsis oculata and, from the obtained biomass, to produce biodiesel through the direct transesterification reaction. The formation of biodiesel was verified by means of the FTIR analysis, indicating the presence of esters in the final product. Through the statistical analysis, it was possible to identify the significant parameters for this model. The maximum yield points found were obtained under conditions 70ºC and 60min and 110ºC and 60min.