Ressonância Magnética Nuclear de Próton como Ferramenta Analítica para Avaliação da Conversão em Ésteres Metílicos

Abstract

The objective of the work was to produce biodiesel from soybean, babassu, and frying oils using two methodologies and to evaluate the use of proton Nuclear Magnetic Resonance as an analytical tool for assessing the conversion into methyl esters. Biodiesel samples were produced by transesterification. According to the results, the 2nd methodology contributes to the increase of conversion into methyl esters in the order of 22.14% (BOS), 2.64% (BOB), and 10.16% (BOF). ¹H NMR was efficacy in determining the conversions into methyl esters, obtaining the same trend as the gas chromatography, as well as in the analysis of the fatty acid profiles of the raw materials, indicating a difference in the intensity of the signals in the regions ~ 4.1 – 4.3 and ~ 5.3 ppm.