Energy‐Efficient Biobutanol Recovery Process Using 1‐Heptanol Extraction

Abstract

Biobutanol is an attractive fuel, owing to its abundant lignocellulose utilization and the similarity of its physical properties to those of gasoline. Biobutanol recovery from its fermentation broth is crucial for large-scale production because of the high costs involved. Extraction considerably reduces the energy demand for distillation, which is extensively used for its recovery. A new solvent, 1-heptanol, was used for extraction in this study, and its thermodynamic model parameters were derived based on liquid-liquid equilibrium data obtained via molecular simulations and experimental measurements. The results of the process design obtained with commercial design software indicated that the energy requirement was significantly lower than those of previously reported processes with comparable investments.

Energy-efficient bioethanol recovery process using deep eutectic solvent as entrainer

“…In the file, the TranslationProbability, RotationProbability, ReinsertionProbability, and GibbsSwapProbability parameters are adjustable; among them, GibbsSwapProbability was the most important for our application. Considering previous molecular simulation studies wherein LLE was applied in butanol and 2,3-butanediol extractions [32,33], a value of 0.05 was deemed optimal in the LLE simulation, while the other parameters were set to the values in the file. In this study, phase transition probability was selected as an adjustable tuning parameter, while all other parameters were kept constant during the simulation.…”

“…The liquid compositions at equilibrium determined using molecular simulation were compared with the experimental results obtained in [13]. Although numerous studies [32,33,47] have implemented molecular simulations for establishing the thermodynamic and physical properties of various compounds, the reliability of the results is generally inadequate. In particular, process designs that necessitate large ( 5)…”

“…The energy efficiency of the developed system was compared to those of existing processes applied to the same ethanol feedstock to demonstrate superior performance of the former. A similar procedure was applied for the production of 2,3-butanediol [32], ethanol [13], and butanol [33] from fermented feedstock.…”

Energy-efficient recovery of fermented butyric acid using octyl acetate extraction

“…Considering product volatility and water content, bioethanol is the only viable fuel for which distillation has been adopted as the recovery process. While many studies have suggested extraction as a common recovery technology [2,[12][13][14][15], the recovery efficiency hinges on finding an adequate solvent. Although general guidelines for solvent selection have been introduced by a number of studies [16][17][18], the limited availability of thermodynamic data for the liquidliquid equilibrium (LLE) discourages butyric acid recovery via extraction despite the numerous benefits of this approach, including low energy demand.…”