Síntese de biodiesel: uma proposta contextualizada de experimento para laboratório de química geral

Roberto Rinaldi, Camila Garcia, Letícia Ledo Marciniuk, Adriana Vitorino Rossi, Ulf Schuchardt
2007 Química Nova  
LABORATORY. The contextualized understanding of concepts in Chemistry by students from other areas is a challenging task. In this experiment, the synthesis of biodiesel is done by base catalyzed transesterification of refined soy oil with methanol at room temperature and common glassware found in any chemistry laboratory. The proposal permits introducing several concepts, such as that of emulsion, viscosity and catalysis to illustrate an activity based on an actual problem. In this didactic
more » ... n this didactic approach, some common problems of biodiesel production, such as soap formation and phase separation, are introduced into the procedure in order to raise questions and motivate the students to participate in the experimental work and stimulate reflections about critical aspects of biodiesel production. This experiment was carried out in the first semester of 2006, in experimental general chemistry taken by physics and agricultural, civil and chemical engineering students of UNICAMP.
doi:10.1590/s0100-40422007000500054 fatcat:od2hlaankzdgbeh3k4huyl4rq4