Facultad de Ciencias Básicas

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Optimización económica de un esquema para la recuperación IBE usando un sistema de destilación azeotrópica-extractiva con biodiesel como extractante
(Universidad Santiago de Cali, 2023-08-25) Dauquí Gutiérrez, Maryory; Grisales Díaz, Víctor Hugo; Caicedo Cano, Carolina
Biobutanol is an alternative to fossil-based fuels, it has environmental benefits and it has better properties than ethanol. Biobutanol is produced by ABE (acetone-butanol-ethanol) or IBE (isopropanol-butanol-ethanol) fermentation. Acetone has caused corrosion on engine parts. Therefore, IBE fermentation is preferable for use as fuel. However, purifying IBE implies high energy consumption. This study includes biodiesel as an additional separating agent in azeotropic-extractive distillation to purify IBE. This scheme does not need extractant regeneration by producing biodiesel-IBE blends directly. Eight biodiesel types are evaluated, including vegetable oils, used cooking oil, and microalgae. The effect of biodiesel type and proportion on process costs and energy requirements are investigated using Aspen Plus and MATLAB®. Machine learning methods are applied to develop optimization surrogate models and identify the most significant operating variables. The optimization minimizes total recovery cost, energy intensity and water loss intensity. The results show that the energy requirements with this scheme are reduced up to 1.3 MJ/kg with energy integration.