The use of solar energy as a renewable energy source has become a good sustainable alternative today and its employment has grown. Solar distillers are powered by sunlight to make the distillation process more sustainable. In this context, the present work consisted of distilling a mixture of ethanol and coconut oil with the intention of solvent reuse in future experiments, in order to make the process more economical and sustainable. For the distillation process, a two-strand solar distiller was constructed by varying three volumes of mixture to be placed for batch distillation in order to study the influence of film thickness on solvent recovery efficiency. A maximum yield of 84.2% was obtained and the optimum liquid thickness obtained through the experiments was 0.16 cm, where the highest alcohol recovery rate was obtained. The present work was satisfactory in relation to the proposed objectives, presenting a completely sustainable process and without energy expenditure.
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