Effect of High Pressure on a Co-Culture for the Production of Methane From Coal Synthesis Gas

Ko, C.W.; Vega, J. L.; Clausen, Edgar C.; Gaddy, J.L.

doi:10.1080/00986448908940178

Cited by 7 publications

(3 citation statements)

References 13 publications

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“…Immediate pressurization of the STR resulted in reduced growth and productivity (Department of Chemical Engineering, University of Arkansas, 1993 ). For B. producta , Ko et al ( 1989 ) calculated an inhibitory p CO of 0.81–1.01 bar employing a modified Monod-Model. Cultivation with only carbon dioxide and hydrogen in the gas stream would circumvent inhibition caused by carbon monoxide.…”

Section: Introductionmentioning

confidence: 99%

Formic Acid Formation by Clostridium ljungdahlii at Elevated Pressures of Carbon Dioxide and Hydrogen

Oswald

Stoll

Zwick

et al. 2018

Front. Bioeng. Biotechnol.

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Low productivities of bioprocesses using gaseous carbon and energy sources are usually caused by the low solubility of those gases (e.g., H2 and CO). It has been suggested that increasing the partial pressure of those gases will result in higher dissolved concentrations and should, therefore, be helpful to overcome this obstacle. Investigations of the late 1980s with mixtures of hydrogen and carbon monoxide showed inhibitory effects of carbon monoxide partial pressures above 0.8 bar. Avoiding any effects of carbon monoxide, we investigate growth and product formation of Clostridium ljungdahlii at absolute process pressures of 1, 4, and 7 bar in batch stirred tank reactor cultivations with carbon dioxide and hydrogen as sole gaseous carbon and energy source. With increasing process pressure, the product spectrum shifts from mainly acetic acid and ethanol to almost only formic acid at a total system pressure of 7 bar. On the other hand, no significant changes in overall product yield can be observed. By keeping the amount of substance flow rate constant instead of the volumetric gas feed rate when increasing the process pressure, we increased the overall product yield of 7.5 times of what has been previously reported in the literature. After 90 h of cultivation at a total pressure of 7 bar a total of 4 g L−1 of products is produced consisting of 82.7 % formic acid, 15.6 % acetic acid, and 1.7 % ethanol.

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Section: Introductionmentioning

confidence: 99%

Formic Acid Formation by Clostridium ljungdahlii at Elevated Pressures of Carbon Dioxide and Hydrogen

Oswald

Stoll

Zwick

et al. 2018

Front. Bioeng. Biotechnol.

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“…Thus, the volumetric mass transfer may be enhanced by increasing either the mass transfer driving force or the mass transfer coefficient. A few studies have shown improved gas conversion and productivity in gas fermentation systems by increasing the solubility of gases, for instance, by decreasing the incubation temperature [15,16] or by operating under moderately elevated pressures within a range of 1-15 atm [17][18][19]. The most common approach so far, though, has been to focus on enhancing the kLa through different reactor designs and configurations.…”

Section: Recent Developments On Syngas and Co2 Bioconversionsmentioning

confidence: 99%

Gas Biological Conversions: The Potential of Syngas and Carbon Dioxide as Production Platforms

Gavala

Grimalt‐Alemany

Skiadas

2021

Waste Biomass Valor

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“…Zeikus and his colleagues (1985) at the Michigan Biotechnology Institute were among the first to propose substituting biocatalysts for the metal-based catalysts currently used to convert syngas into industrial chemicals. A few years later Gaddy and coworkers at the University of Arkansas published a series of papers detailing how a variety of products, including methane, acetic acid, and ethanol, might be fermented from syngas (Ko et al 1989;Vega et al 1989 a, b, c, d). Because of the US Department of Energy's interest in developing alternative transportation fuels from biomass, much of the early work in syngas fermentation focused on alcohol production.…”

Section: Origins Of Biorefineries Based On Syngas Fermentationmentioning

confidence: 99%

Biomass Refineries Based on Hybrid Thermochemical‐Biological Processing‐An Overview

Brown¹

2005

Biorefineries‐Industrial Processes and Products

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Effect of High Pressure on a Co-Culture for the Production of Methane From Coal Synthesis Gas

Cited by 7 publications

References 13 publications

Formic Acid Formation by Clostridium ljungdahlii at Elevated Pressures of Carbon Dioxide and Hydrogen

Formic Acid Formation by Clostridium ljungdahlii at Elevated Pressures of Carbon Dioxide and Hydrogen

Gas Biological Conversions: The Potential of Syngas and Carbon Dioxide as Production Platforms

Biomass Refineries Based on Hybrid Thermochemical‐Biological Processing‐An Overview

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