Standardization of Mass Transfer Measurements

Höffmann, Achim; Maćkowiak, J.; Górak, Andrzej; Haas, Matthijs P. de; Löning, J.-M.; Runowski, Thomas; Hallenberger, K.

doi:10.1205/cherd06134

Cited by 62 publications

(29 citation statements)

References 22 publications

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“…Also Hoffmann et al (2007) showed discrepancy and inconsistency between different sources in literature data determining mass transfer parameters of packing materials used in absorption columns and concluded that standard procedures for measuring mass transfer of absorption systems are still required. Existing correlations are often made for relatively older packing elements.…”

Section: Determining Mass Transfer Ratesmentioning

confidence: 99%

“…This is especially true for the sampling procedures (non-elimination of end effects in a packed column), and non-uniform distribution of the gas and liquid phases through the packed column is proposed as the main reasons for these discrepancies, which is an important lesson to future research on mass transfer in biological gas treatment systems. To improve the experimental technique used to determine mass transfer coefficients, it has been proposed (Hoffmann et al 2007) that pre-humidification to a saturation level be included to avoid both evaporation and condensation, maintain a constant temperature and pressure, prevent wall effects, and guarantee uniform liquid and gas distribution in the experimental setup.…”

Section: Determining Mass Transfer Ratesmentioning

confidence: 99%

“…An instantaneous chemical reaction of a compound in the liquid phase can be used to determine directly the gas-side mass transfer coefficient. Different authors (Billet and Shultes 1999; Hoffmann et al 2007, Linek et al 2001) have used the absorption of SO 2 from the gas phase in an aqueous NaOH solution, after Linek et al (1995) proved that the absorption rate was independent from the OH concentration across a large concentration range down to 0.01 M.…”

Section: Determining Mass Transfer Ratesmentioning

confidence: 99%

See 2 more Smart Citations

Review of mass transfer aspects for biological gas treatment

Kraakman

Rocha-Ríos

Loosdrecht

2011

Appl Microbiol Biotechnol

176

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This contribution reviews the mass transfer aspects of biotechnological processes for gas treatment, with an emphasis on the underlying principles and technical feasible methods for mass transfer enhancements. Understanding of the mass transfer behavior in bioreactors for gas treatment will result in improved reactor designs, reactor operation, and modeling tools, which are important to maximize efficiency and minimize costs. Various methods are discussed that show the potential for a more effective treatment of compounds with poor water solubility.

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Section: Determining Mass Transfer Ratesmentioning

confidence: 99%

Section: Determining Mass Transfer Ratesmentioning

confidence: 99%

Section: Determining Mass Transfer Ratesmentioning

confidence: 99%

See 1 more Smart Citation

Review of mass transfer aspects for biological gas treatment

Kraakman

Rocha-Ríos

Loosdrecht

2011

Appl Microbiol Biotechnol

176

View full text Add to dashboard Cite

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“…Temperature (°C) Correlation used to determine the Henry's law constant Perry 29 Ferre-Aracil et al 46 Mizuno-Tsuno 47 20 3.57 ± 0. 6.89 ± 0.59 6.30 ± 0.53 6.10 ± 0.52 35 12.2 ± 0.8 9.67 ± 0.60 9.50 ± 0.59…”

Section: Assumptions Verificationmentioning

confidence: 98%

Assessment of a Stirred-Cell Reactor Operated Semicontinuously for the Kinetic Study of Fast Direct Ozonation Reactions by Reactive Absorption

Dang

Biard

Couvert

2016

Ind. Eng. Chem. Res.

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A jacketed stirred-cell reactor, operated semi-continuously, was used to assess the kinetics of fast ozonation reactions by reactive absorption. The method was applied to the direct ozone reaction with resorcinol. A high resorcinol concentration was used to reach a steady state and to neglect the byproducts accumulation. Thus, the mass-transfer rate, and consecutively the reaction rate, were deduced from the ozone mass balance in the gas phase. The gas-phase and liquid-phase mass-transfer coefficients were previously measured directly through the ozone absorption in appropriated conditions. The results emphasized the high sensitivity of the reaction rate constant to the ozone physicochemical properties, especially its solubility, which is controversial in the literature. Therefore, several correlations used to calculate the ozone solubility in water were considered to calculate the second-order reaction rate constant, which varied from 3.57-4.68 10 5 L mol -1 s -1 at 20°C to 9.50-12.2 10 5 L mol -1 s -1 at 35°C. The activation energy was in the range 35-59 kJ mol -1 depending on the considered ozone solubility correlation. A sensitivity analysis is provided to assess the influence of the experimental conditions and ozone physicochemical properties on the model. Finally, the applicability of this method is thoroughly discussed.2

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“…Such approaches are also needed for absorption and desorption processes as well as random packing materials and trays. Hoffman et al [8] and most recently Kunze et al [36] reported research activities on the standardization of mass transfer measurements for absorption and desorption processes. Lastly, tray and packing vendors as well as the applying industry have to agree on these standards.…”

Section: Future Research Tasksmentioning

confidence: 99%

Research on Mass Transfer Columns: passé?

Schultes¹

2013

Chem Eng & Technol

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Since university research on mass transfer columns has decreased significantly in recent years, it is discussed whether the current knowledge of mass transfer technology for trays, packing materials, and column internals is sufficient to design energy-and cost-efficient systems. Points of view are described that have not yet been clarified from an industrial position and should play an important role in future research. In addition to the thermodynamics of industrially relevant systems, an improved description of the fluid dynamics and mass transfer efficiency in trayed and packed columns is included. Research should focus beyond ideal test mixtures which employ standardized test equipments and test systems. Industrial parameters such as foams and solids as well as chemical and catalytic mass transfer are also of great interest.

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Standardization of Mass Transfer Measurements

Cited by 62 publications

References 22 publications

Review of mass transfer aspects for biological gas treatment

Review of mass transfer aspects for biological gas treatment

Assessment of a Stirred-Cell Reactor Operated Semicontinuously for the Kinetic Study of Fast Direct Ozonation Reactions by Reactive Absorption

Research on Mass Transfer Columns: passé?

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