Volumetric Mass Transfer Coefficents of Gas Liquid Jet Loop Reactors by Oxidation of Hydrazine

Warnecke, Hans‐Joachim; Hubmann, P.

doi:10.1080/00986448908940190

Cited by 10 publications

(4 citation statements)

References 7 publications

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“…The complete gas utilization eliminates the problems of safety control on the offgas streams, and moreover, the gas circulation loop circumvents the problem of the removal of undesired volatile components from the gas phase. 57 Due to the operating principle and construction, the JLR exhibits numerous favorable features regarding its process application as well as design and scale-up. A high intensity interfacial area and a high mass transfer in the reactor occurs from the dispersion behavior.…”

Section: Continuously Stirred Tank Reactor (Cstr)mentioning

confidence: 99%

“…Hence, the JLR can be operated at large values of gas throughput, providing large intensity interfacial area, without loss of the active component or requirements for installation of a circulation compressor. The complete gas utilization eliminates the problems of safety control on the off-gas streams, and moreover, the gas circulation loop circumvents the problem of the removal of undesired volatile components from the gas phase …”

Section: Production Of S-apg Through the Chemical Routementioning

confidence: 99%

“…The JLR is thus particularly suitable for fast reactions in which the liquid phase mass transfer is the reaction-limiting step of the process. Glycosylation occurring in a jet loop reactor may have the potential of reducing the fatty alcohol used in excess due to turbulent mixing efficiency, leading to equipment sizing reduction and ease of equipment handling. , Table S1 provides a comparison between jet loop reactor and CSTR for the glycosylation process.…”

Section: Production Of S-apg Through the Chemical Routementioning

confidence: 99%

See 2 more Smart Citations

Toward Sustainable Production of Sugar-Based Alkyl Polyglycoside Surfactant─A Comprehensive Review on Synthesis Route and Downstream Processing

Chin

Shahruddin

Chua

et al. 2023

Ind. Eng. Chem. Res.

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This review aims to identify the challenges and opportunities in sustainable production of sugar-based alkyl polyglycoside, s-APG, by first assessing and subsequently comparing the production route and downstream processing for both the chemically and biologically catalyzed synthesis process, from the perspective of critical operating parameters, type of reactor technologies, and downstream processing strategies. From a sustainability point-view, the acidic homogeneous catalyst in chemically catalyzed s-APG production should be substituted by a practically active, stable, and recyclable heterogeneous catalyst. Alternatively, the green solvent could be used to increase the interaction between sugar and fatty alcohol, resulting in high yield s-APG without using a catalyst. To make the process employing biocatalyst more economically competitive, the free enzyme must be reused through the immobilization method, reactor intensified with membrane or other appropriate downstream processes. A less energy-intensive extraction process to replace the existing evaporative method to separate fatty alcohol from s-APG also deserves an intensive investigation.

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Section: Continuously Stirred Tank Reactor (Cstr)mentioning

confidence: 99%

Section: Production Of S-apg Through the Chemical Routementioning

confidence: 99%

Section: Production Of S-apg Through the Chemical Routementioning

confidence: 99%

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Toward Sustainable Production of Sugar-Based Alkyl Polyglycoside Surfactant─A Comprehensive Review on Synthesis Route and Downstream Processing

Chin

Shahruddin

Chua

et al. 2023

Ind. Eng. Chem. Res.

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show abstract

“…For this type of reaction, an alternative to the STR concept, in which mixing and dispersing is achieved by a liquid jet generated by an ejector, is widely used and applied in industry. It has been shown that these so called Venturi or ejector loop reactors (ELR) favour higher mass transfer rates compared to the STR at comparable power inputs . Loop reactors with liquid jets in downflow mode especially feature favourable mass transfer characteristics .…”

Section: Introductionmentioning

confidence: 99%

The ejector loop reactor: Application for microbial fermentation and comparison with a stirred‐tank bioreactor

Ughetti

Jussen

Riedlberger

2018

Engineering in Life Sciences

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Ejector loop reactors (ELR) are successfully used in industrial chemical processes for gas/liquid reactions. They achieve higher mass transfer rates compared to the stirred‐tank reactor (STR) at comparable specific power input. Insufficient oxygen transport and shear stress induced growth inhibition are limiting parameters during microbial fermentation. Due to its better mass transfer characteristics, the ELR was expected to have beneficial effects on biomass and recombinant protein production. One concern, however, was whether the ELR's shear stress characteristics would have a negative effect. This study evaluated the suitability of using the Buss‐Loop® Reactor (BLR), one of the most advanced ELR technologies, as a bioreactor. The well‐studied STR was used as a reference. A lab scale BLR was adapted for microbial fermentation. Mass transfer rates and specific power inputs were within the same order of magnitude in the ELR and the reference STR. Maximum kLa values of 207 and 205 h−1 at power inputs of 6.9 and 9.7 W/L were measured in the ELR and STR, respectively. During batch fermentation of Escherichia coli K12 MG1655, maximum cell densities were higher in the ELR (OD600 of 22) than in the STR (OD600 of 18). Green fluorescence protein (GFP) production with pGS1 was comparable; however, more GFP was released into the media in the ELR. This indicates higher cell disruption compared to the STR. Despite this drawback of the first prototype, our work clearly demonstrates the potential of the ELR as a system for microbial fermentations.

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Gasphasedispersion in einem Gas/Flüssigkeits‐Strahldüsen‐Schlaufenreaktor

Warnecke

Vaupel²,

Prüß

et al. 1989

Chemie Ingenieur Technik

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Volumetric Mass Transfer Coefficents of Gas Liquid Jet Loop Reactors by Oxidation of Hydrazine

Cited by 10 publications

References 7 publications

Toward Sustainable Production of Sugar-Based Alkyl Polyglycoside Surfactant─A Comprehensive Review on Synthesis Route and Downstream Processing

Toward Sustainable Production of Sugar-Based Alkyl Polyglycoside Surfactant─A Comprehensive Review on Synthesis Route and Downstream Processing

The ejector loop reactor: Application for microbial fermentation and comparison with a stirred‐tank bioreactor

Gasphasedispersion in einem Gas/Flüssigkeits‐Strahldüsen‐Schlaufenreaktor

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