Steam Flow Through Reboilers

Lieberman, Norman P.

doi:10.1016/b978-0-12-816161-6.00015-1

Cited by 2 publications

(2 citation statements)

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“…Thus, the amount of lost water is 2450 m w 3 /h for the base case and only 133 m w 3 /h for the enhanced case. Additionally, about 70% of steam condensate recovery is assumed to include potential steam leaks, condensate losses, steam trap failures and other possible inefficiencies in the steam generation and usage 53 . Taking this into account, the total fresh water requirements are 13.44 and 0.73 m w 3 /kg product for base case and enhanced process respectively.…”

Section: Resultsmentioning

confidence: 99%

Turning waste into value: eco‐efficient recovery of by‐products from biomass pretreatment in lignocellulosic biorefineries

Janković,

Straathof,

Kiss

2023

Biofuels Bioprod Bioref

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This original research contributes to enhancing the viability of biorefineries through recovering valuable by‐products from the liquid remaining after the biomass pretreatment by hot liquid water. A novel downstream processing method is developed for the recovery of acetic acid, formic acid, furfural and 5‐hydroxymethylfurfural (HMF) by enhanced distillation. The major challenge in this research is the processing of the highly diluted initial solution (>96 wt% water) and the thermodynamic limitations owing to possible formation of several azeotropes. This new process recovers 78.7% of the acetic acid (99.8 wt%), while the rest of it is recycled back to the biomass pretreatment step together with most of the separated water from the initial solution. Over 99.5% of formic acid, furfural and HMF is also recovered, at purities of 74.7, 98.0 and 100 wt%, respectively. Vapor recompression and heat integration are implemented to decrease the energy use. The results demonstrate a 77.4% decrease in total annual costs (from $3.44 to 0.78/kgproduct), a 75.0% reduction in minimum average selling price (from $3.50 to 0.87/kgproduct), an 81.1% reduction in energy requirements (from 77.41 to 14.66 kWthh/kgproduct) and an up to 99.7% decrease in CO2 emissions (from 11.17 to 0.03 kgCO2/kgproduct).

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Section: Resultsmentioning

confidence: 99%

Turning waste into value: eco‐efficient recovery of by‐products from biomass pretreatment in lignocellulosic biorefineries

Janković,

Straathof,

Kiss

2023

Biofuels Bioprod Bioref

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“…Water consumption is the amount of fresh water used per kilogram of product 22 . This metrics accounts for cooling water, with loss assumption of 7%, 22 and additional water that includes all inefficiencies in steam generation and usage, with the assumption that 70% of steam condensate is recovered 24 Material intensity represents the amount of formed waste 22 or non‐product 25 per kilogram of product. Greenhouse gas emission accounts for the amount of carbon dioxide (CO 2 ) emitted per kilogram of product 22 .…”

Section: Methodsmentioning

confidence: 99%

Advanced purification of isopropanol and acetone from syngas fermentation

Janković,

Straathof,

Kiss

2023

J of Chemical Tech & Biotech

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BACKGROUNDIsopropanol and acetone production by syngas fermentation is a promising alternative to conventional fossil carbon‐dependent production. However, this alternative technology has not yet been scaled up to an industrial level owing to the relatively low product concentrations (about 5 wt% in total). This original research aims to develop cost‐effective and energy‐efficient processes for the recovery of isopropanol and acetone from highly dilute fermentation broth (>94 wt% water) for large‐scale production (about 100 ktIPA+AC y−1).RESULTSVacuum distillation and pass‐through distillation enhanced with heat pumps or multi‐effect distillation were efficiently coupled with regular atmospheric distillation and extractive distillation in several innovative intensified downstream processes. Over 99.2% of isopropanol and 100% of acetone were recovered as high‐purity end‐products (>99.8 wt%). Advanced heat pumping (mechanical vapor recompression) and heat integration techniques were implemented to decrease total annual costs (0.109–0.137 USD kgIPA+AC−1), reduce energy requirements (1.348–2.043 kWth h kgIPA+AC−1) and lower CO2 emissions (0.067–0.191 kgCO2 kgIPA+AC−1), resulting in highly competitive recovery processes.CONCLUSIONThe proposed three novel isopropanol and acetone recovery processes from dilute broth significantly contribute to the expansion of sustainable industrial fermentation. Furthermore, this original research is the first one to develop novel pass‐through distillation technology for the complex isopropanol–acetone–water system. All the designed processes are highly economically competitive and environmentally viable. In addition to recovering efficiently both isopropanol and acetone, the designed downstream processes offer the possibility to enhance the fermentation process by recycling all the present microorganisms and reducing fresh‐water requirements. © 2023 The Authors. Journal of Chemical Technology and Biotechnology published by John Wiley & Sons Ltd on behalf of Society of Chemical Industry (SCI).

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Steam Flow Through Reboilers

Cited by 2 publications

References 1 publication

Turning waste into value: eco‐efficient recovery of by‐products from biomass pretreatment in lignocellulosic biorefineries

Turning waste into value: eco‐efficient recovery of by‐products from biomass pretreatment in lignocellulosic biorefineries

Advanced purification of isopropanol and acetone from syngas fermentation

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