Ethanol and isobutanol dehydration by heat-integrated distillation

Díaz, Víctor Hugo Grisales; Tost, Gerard Olivar

doi:10.1016/j.cep.2016.07.005

Cited by 38 publications

(20 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Hence, the low energy requirements of MAVS were mainly achieved through heat integration by vapor compression. A similar result was observed in our previous study for ethanol or isobutanol dehydration [25]. However, it is important to mention that non-condensable, pressure drop, among others, may have a different effect in MAVS and recycle of vinasses are not performed in…”

Section: Discussionsupporting

confidence: 89%

“…The parameters for butanol-water mixture were those reported by Fisher and Gmehling [13,29] In all the distillation systems studied in this work, condensation heat was not used to preheat the feed of ABE concentration columns. Instead, the exit from these distillation columns was used to preheat their respective feed, maximizing the heat integration [25]. The distillation processes after this integration achieved a waste mash temperature of 47 ºC (fermentation temperature of 37 °C, minimum approach temperature of 10 °C), which is a temperature suitable for solids concentration by filtration [30].…”

Section: Methodsmentioning

confidence: 99%

“…Ethanol and isobutanol anhydrous (99.7 wt%) are achieved by extractive and azeotropic distillation, respectively [25]. Glycerol is the extractant used in ethanol dehydration system [25].…”

Section: Mavsmentioning

confidence: 99%

“…The concentration of ethanol and isobutanol from broth are 10 and 2 wt% [25], respectively. The TRC of isobutanol purification by VC was 1.07-fold lower than that of ABE purification by 3DC-VC (C. acetobutylicum JB200, Table 3).…”

Section: Mavsmentioning

confidence: 99%

“…Integrated distillation systems may need an investment higher than that for conventional distillation; therefore, an economic analysis was performed. Considering biofuel application, the energy efficiency of ABE recovery by distillation was compared with that for the dehydration of alternative biofuels (isobutanol, ethanol and isopropanol, butanol and ethanol (IBE) [25,26]).…”

Section: Introductionmentioning

confidence: 99%

See 4 more Smart Citations

Energy efficiency of acetone, butanol, and ethanol (ABE) recovery by heat-integrated distillation

Díaz

Tost

2017

Bioprocess Biosyst Eng

Self Cite

View full text Add to dashboard Cite

Acetone, butanol, and ethanol (ABE) is an alternative biofuel. However, the energy requirement of ABE recovery by distillation is considered elevated (> 15.2 MJ fuel/Kg-ABE), due to the low concentration of ABE from fermentation broths (between 15 and 30 g/l). In this work, to reduce the energy requirements of ABE recovery, four processes of heat-integrated distillation were proposed. The energy requirements and economic evaluations were performed using the fermentation broths of several biocatalysts. Energy requirements of the processes with four distillation columns and three distillation columns were similar (between 7.7 and 11.7 MJ fuel/kg-ABE). Double-effect system (DED) with four columns was the most economical process (0.12-0.16 $/kg-ABE). ABE recovery from dilute solutions by DED achieved energy requirements between 6.1 and 8.7 MJ fuel/kg-ABE. Vapor compression distillation (VCD) reached the lowest energy consumptions (between 4.7 and 7.3 MJ fuel/kg-ABE). Energy requirements for ABE recovery DED and VCD were lower than that for integrated reactors. The energy requirements of ABE production were between 1.3- and 2.0-fold higher than that for alternative biofuels (ethanol or isobutanol). However, the energy efficiency of ABE production was equivalent than that for ethanol and isobutanol (between 0.71 and 0.76) because of hydrogen production in ABE fermentation.

show abstract

Section: Discussionsupporting

confidence: 89%

Section: Methodsmentioning

confidence: 99%

“…Ethanol and isobutanol anhydrous (99.7 wt%) are achieved by extractive and azeotropic distillation, respectively [25]. Glycerol is the extractant used in ethanol dehydration system [25].…”

Section: Mavsmentioning

confidence: 99%

Section: Mavsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations