Connecting gasification with syngas fermentation: Comparison of the performance of lignin and beech wood

Liakakou, E.T.; Infantes, Alba; Neumann, Anke; Vreugdenhil, B.J.

doi:10.1016/j.fuel.2020.120054

Cited by 38 publications

(39 citation statements)

References 35 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Even with this flexibility identified for acetogens involved in syngas fermentation, a low ratio of H 2 to CO is preferred as most of the organisms grow better on CO than H 2 [23]. Lanzillo et al [63] showed that partial pressure of CO affected the growth kinetics of the microorganism and the optimal P CO within the studied range (0.5 to 2.5 atm) was 1.1 atm.…”

Section: H 2 /Co Ratiosmentioning

confidence: 99%

“…Liakakou et al [23] compared the performance of lignin and beech wood in a system combining the biomass gasification (bubbling fluidized bed reactor) and syngas fermentation. Comparing the syngas obtained, H 2 production was significantly higher when lignin was used while CO was meaningfully higher in beech wood gasification.…”

Section: Biomass Compositionmentioning

confidence: 99%

“…As previously mentioned, syngas composition depends on process parameters, reactor design, gasifying agent, type of feedstock and its properties, besides the catalyst, when it is present [8,52]. Two aspects of its composition are particularly important for successfully integrating thermochemical and biochemical technologies, syngas impurities and H 2 /CO ratios [10,23].…”

Section: The Effect Of Syngas Composition On Fermentationmentioning

confidence: 99%

“…For example, direct gasification of biomass using a fluidized bed gasifier provides a ratio of H 2 to CO between 0.25 and 0.53. Three gasification technologies (fixed bed updraft gasification with 30 kg/h solid feed, bubbling fluidized bed gasification with 0.3 kg/h solid feed and indirect gasification with 3 kg/h solid feed) resulted in quite different molar H 2 /CO ratios ranging from 0.6 to 1.0 [23]. One of the advantages of syngas fermentation over chemical conversions to liquid fuels is the flexibility of feedstock and syngas composition because microorganisms do not require precise H 2 /CO ratios [10].…”

Section: H 2 /Co Ratiosmentioning

confidence: 99%

See 3 more Smart Citations

Impacts of Syngas Composition on Anaerobic Fermentation

et al. 2021

View full text Add to dashboard Cite

Energy consumption places growing demands on modern lifestyles, which have direct impacts on the world’s natural environment. To attain the levels of sustainability required to avoid further consequences of changes in the climate, alternatives for sustainable production not only of energy but also materials and chemicals must be pursued. In this respect, syngas fermentation has recently attracted much attention, particularly from industries responsible for high levels of greenhouse gas emissions. Syngas can be obtained by thermochemical conversion of biomass, animal waste, coal, municipal solid wastes and other carbonaceous materials, and its composition depends on biomass properties and gasification conditions. It is defined as a gaseous mixture of CO and H2 but, depending on those parameters, it can also contain CO2, CH4 and secondary components, such as tar, oxygen and nitrogenous compounds. Even so, raw syngas can be used by anaerobic bacteria to produce biofuels (ethanol, butanol, etc.) and biochemicals (acetic acid, butyric acid, etc.). This review updates recent work on the influence of biomass properties and gasification parameters on syngas composition and details the influence of these secondary components and CO/H2 molar ratio on microbial metabolism and product formation. Moreover, the main challenges, opportunities and current developments in syngas fermentation are highlighted in this review.

show abstract

Section: H 2 /Co Ratiosmentioning

confidence: 99%

Section: Biomass Compositionmentioning

confidence: 99%

Section: The Effect Of Syngas Composition On Fermentationmentioning

confidence: 99%

Section: H 2 /Co Ratiosmentioning

confidence: 99%

See 2 more Smart Citations

Impacts of Syngas Composition on Anaerobic Fermentation

et al. 2021

View full text Add to dashboard Cite

show abstract

“…This study aims to close the gap in the existing literature concerning the effects of individual trace impurities in syngases. Studies so far focused solely on the effects of syngas from gasification of biogenic residues and found inhibiting effects without clearly identifying the components responsible for the effects (Infantes et al, 2020;Liakakou et al, 2021). Also, most studies focused on C. ljungdahlii as a typical model organism for acetogenic bacteria, while this study used C. carboxidivorans as a promising acetogen for the production of longer chain alcohols.…”

Section: Introductionmentioning

confidence: 99%

Studies on Syngas Fermentation With Clostridium carboxidivorans in Stirred-Tank Reactors With Defined Gas Impurities

et al. 2021

View full text Add to dashboard Cite

Syngas fermentation processes with acetogenic bacteria like Clostridium carboxidivorans have been proven to be a promising approach for the conversion of CO-rich waste gases into short- and medium-chain alcohols. The challenge of synthesis gas impurities, on the other hand, has always been a major concern for establishing an industrial-scale process, since some of the trace components in waste gases, such as NH3, H2S, and NOx, can have inhibiting or even toxic effects on microbial growth and product formation. Thus, this study aims to identify the effects of the main trace impurities in syngas from gasification of biogenic residues by the supply of defined concentrations of trace impurities to the cultivation medium. Autotrophic gas fermentation studies were performed with C. carboxidivorans in batch-operated fully-controlled stirred-tank bioreactors with continuous gas supply (80% CO and 20% CO2). The syngas components NH3 and H2S had a positive effect on both growth and alcohol formation (ethanol, 1-butanol, and 1-hexanol). The maximum biomass concentration was increased by more than 50%, and the maximum ethanol concentration was more than doubled with 5.0 g L−1 NH4Cl or 1.0 g L−1 H2S provided by the addition of 2.2 g L−1 thioacetamide. The addition of the nitrogen oxide species nitrate and nitrite, on the other hand, reduced biomass growth as well as alcohol concentrations. Already, the supply of 0.1 g L−1 NaNO3 resulted in reduced growth and 25% reduction of the maximum ethanol concentration. The production of the longer chain alcohols 1-butanol and 1-hexanol was reduced as well. All NaNO2 concentrations tested showed a strong toxic effect on the metabolism of C. carboxidivorans, and neither CO consumption nor product formation was observed after addition. As a consequence, NOx components in syngas from the gasification of biogenic residues should be reduced by the gasification process and/or selectively removed from the syngas after gasification.

show abstract

The New Biorefineries: Integration with New Technologies for Carbon Capture and Utilization to Produce Bioethanol

Pavan

2022

Biofuel and Biorefinery Technologies

View full text Add to dashboard Cite

Connecting gasification with syngas fermentation: Comparison of the performance of lignin and beech wood

Cited by 38 publications

References 35 publications

Impacts of Syngas Composition on Anaerobic Fermentation

Impacts of Syngas Composition on Anaerobic Fermentation

Studies on Syngas Fermentation With Clostridium carboxidivorans in Stirred-Tank Reactors With Defined Gas Impurities

The New Biorefineries: Integration with New Technologies for Carbon Capture and Utilization to Produce Bioethanol

Contact Info

Product

Resources

About