Produção de biodiesel a partir do óleo da borra de café por transesterificação heterogênea utilizando CaO de cascas de ovos como catalisador

Abstract

Society has been facing, in recent years, several problems and crises related to the use of fossil fuels, such as the high cost due to its ever closer scarcity and the great contribution to global pollution. The scientific community has been looking for renewable and low-cost energy sources in order to produce alternative fuels to meet the energy demands of the world population, biodiesel was one of the developed alternatives. Coffee grounds and eggshells are one of the most produced household wastes in Brazil and in the world, wastes that have great potential to be explored for the industrial production of high added value products, such as biodiesel. The triglycerides that make up the coffee grounds can be extracted using organic solvents, n-hexane for example. Eggshells show to be an excellent source of calcium carbonate, which can be converted into calcium oxide, an efficient and promising catalyst that acts in the transesterification reaction of biodiesel synthesis.