Using exergy to analyse the sustainability of fermentative ethanol and acetate production from syngas via anaerobic bacteria (Clostridium ljungdahlii)

Dadak, Ali; Aghbashlo, Mortaza; Tabatabaei, Meisam; Younesi, Habibollah; Najafpour, Ghasem

doi:10.1016/j.seta.2016.03.001

Cited by 15 publications

(13 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…This study also shows a final cell concentration of 1.0 g/L at 2.0 atm after 70 hours of fermentation [12].In the present work,it was possible to achieve a similar cell concentration (1.245 g/L) after 15 hours of experiment, with a lower lag phase (3 hours) with lower pressure(1.2 atm). C. ljungdahliiin syngas fermentation presented a lag phase of approximately 10 hours and a final cell concentration of 1 g/L in 50 hours of fermentation at a pressure of 1.20 atm [13].Both studies ( [12] and [13] with bottles kept in a vertical position, and, therefore, with lower gas transfer rate. With bottles kept horizontally it was possible to increase CO and CO 2 transfer to the liquid phase, which might have reduced lag phase because of the availability these two substrates promptly.Higher gas transfer caused by the turbulence of the bottles in the horizontal position increased also ethanol and acetic acid production as Table 1 shows.…”

Section: A New Strategy For Acetogenic Bacteriacell Growth and Metabomentioning

confidence: 98%

A New Strategy for Acetogenic Bacteriacell Growth and Metabolites Production Using Syngas in Lab Scale

Ribeiro¹,

Coelho²,

Ferreira³

et al. 2017

IOSR JBB

View full text Add to dashboard Cite

Section: A New Strategy For Acetogenic Bacteriacell Growth and Metabomentioning

confidence: 98%

A New Strategy for Acetogenic Bacteriacell Growth and Metabolites Production Using Syngas in Lab Scale

Ribeiro¹,

Coelho²,

Ferreira³

et al. 2017

IOSR JBB

View full text Add to dashboard Cite

“…18 A exergia química de um dado componente é relacionada ao trabalho máximo (teórico) que pode ser obtido quando uma quantidade de massa desse componente pode se misturar totalmente a uma atmosfera à temperatura e pressão padrão T0 e P0. 12 Neste caso, considera-se que o equilíbrio químico já foi alcançado. Ou ainda, a cinética de reação não é considerada neste termo.…”

Section: Componentes Exergéticosunclassified

“…: bagaço de cana-deaçúcar, palha e capim-elefante) para a produção de etanol 2G, em substituição aos recursos alimentícios. [9][10][11][12][13][14] A conversão bioquímica de matériasprimas lignocelulósicas em etanol 2G consiste em três etapas principais: pré-tratamento, hidrólise enzimática e fermentação. No entanto, a maioria das tecnologias propostas esbarra em dificuldades técnicas ou econômicas.…”

Section: Introductionunclassified

“…Tradicionalmente, a análise energética, baseada na Primeira Lei da Termodinâmica, é a abordagem utilizada para estimar o desempenho de vários processos de conversão energética. 12 No entanto, a literatura recente aponta o uso de análises baseadas na Segunda Lei da Termodinâmica como mais apropriadas quando comparada às leis de conservação de energia (Primeira Lei). 12,16 Neste cenário, a análise exergética, a qual provém da combinação da Primeira e da Segunda Leis da termodinâmica, merece destaque.…”

Section: Introductionunclassified

“…12 No entanto, a literatura recente aponta o uso de análises baseadas na Segunda Lei da Termodinâmica como mais apropriadas quando comparada às leis de conservação de energia (Primeira Lei). 12,16 Neste cenário, a análise exergética, a qual provém da combinação da Primeira e da Segunda Leis da termodinâmica, merece destaque. Tal abordagem fornece uma medida mais aproximada de como o desempenho real se compara ao ideal e identifica, mais claramente do que a análise de energia, as causas e localização das perdas termodinâmicas (irreversibilidades) e o impacto do ambiente construído no ambiente natural.…”

Section: Introductionunclassified

See 2 more Smart Citations

Application of Thermodynamic Property Exergy in the Evaluation of a Processes of Production of Lignocellulosic Ethanol: A Review

et al. 2018

View full text Add to dashboard Cite

The ethanol production process employing lignocellulosic material (second generation ethanol-2G) is one of the remarkable proposals for the worldwide energetic security. Currently, there is a significant technical-scientific effort in order to obtain sustainable alternative routes for the production of 2G ethanol. The thermodynamic property exergy can be applied for the execution of the energetic analysis of this type of system. The analysis of the exergetic content indicates the economic value associated to the process, since it is characterized as the potential to execute work. In this sense, the exergetic analysis is applied to evaluate alternative technologies for the sustainable development, being a resource of increasing use in the literature. However, there is still a reduced amount of review articles, particularly in Brazilian literature, destined to present the application of this type of analysis to 2G ethanol production. Therefore, this article aims to exhibit some fundamental concepts about this technique, as well as indicators and analysis methods based on exergy. Besides that, applications of the technique to 2G ethanol production processes are presented, in order to highlight the applicability of the thermodynamic evaluation, exergetic analyses and methods and main diagnoses obtained by means of this technique.

show abstract

Bioethanol production by Enterobacter hormaechei through carbon monoxide‐rich syngas fermentation

Pati

Mohanty

Mohapatra

et al. 2022

Intl J of Energy Research

View full text Add to dashboard Cite

Summary Fossil fuel depletion and environmental contamination coupled with food vs fuel conflict motivated sustainable bioethanol production through syngas fermentation utilizing lignocellulosic biomass as feedstock. Herein, Enterobacter sp. RF2 strain was selected for the investigation out of the nine anaerobes that were screened for bioethanol production using the pyridinium chlorochromate assay. Under optimal conditions, Enterobacter sp. RF2 and the reference strain Clostridium ljungdahlii ATCC‐55383 produced 21.8 and 37.7 g/L of bioethanol in an anaerobic culture bottle and 25.3 and 39.6 g/L of bioethanol in a stirred tank reactor via syngas fermentation. Furthermore, infra‐red spectra and proton nuclear magnetic resonance illustrated chemical shift patterns of bioethanol. The high bioethanol producer was identified as Enterobacter hormaechei RF2 by in silico analysis. Here, it was reported for the first time that E. hormaechei RF2 is high ethanol tolerant and genetically stable bioethanol producer that can be exploited for pilot‐scale production to meet the rising demand for fossil fuels and lessen eco‐pollution. Thus, this research will pave the way for the commercialization of green chemicals which is the need of the hour in the current scenario. However, the cost of biomass conversion to bioethanol must be less than the existing price of gasoline to be competitive and get economic acceptance. Although this method is now at the pre‐commercialization stage due to lack because of techno‐economic feasibility, but usage of suitable substrates and concurrent production of different valuable products can make the entire process cost affordable. Therefore, by providing employment to the rural population through the exploitation of lignocellulosic biomass, eco‐friendly fuel to the customer, and lucrative fuel business to industries, it might thus hypothesize an intriguing future for our global economy.

show abstract

Using exergy to analyse the sustainability of fermentative ethanol and acetate production from syngas via anaerobic bacteria (Clostridium ljungdahlii)

Cited by 15 publications

References 32 publications

A New Strategy for Acetogenic Bacteriacell Growth and Metabolites Production Using Syngas in Lab Scale

A New Strategy for Acetogenic Bacteriacell Growth and Metabolites Production Using Syngas in Lab Scale

Application of Thermodynamic Property Exergy in the Evaluation of a Processes of Production of Lignocellulosic Ethanol: A Review

Bioethanol production by Enterobacter hormaechei through carbon monoxide‐rich syngas fermentation

Contact Info

Product

Resources

About