Continuous foam fractionation is a well-known technique for selectively separating surface-active molecules from aqueous solutions. Due to the amphiphilic nature of proteins and enzymes, foam fractionation is seen as an innovative separation method for downstream processing of biochemical processes. The focus of this thesis was the theoretical and experimental investigation of the foam… Mehr zeigen fractionation process operated in stripping mode to gain more process knowledge. To investigate the role of the bubble size for the performance of a foam fractionation process, an optical method for determining bubble size distributions was developed and validated. Additionally, a simple and reproducible foam sampling tool was developed enabling the measurement of liquid fraction and concentration profiles along the foam height. Thus, for the first time it was shown that the foam bed could be characterized with one single bubble size, the mean Sauter diameter d32,mean, and the corresponding liquid fraction εL and that the bubble size directly controlled the separation efficiency. As there was no existing model describing concentration changes along the foam height, three different models were developed and investigated in detail by comparing simulated and measured foam concentration profiles: an ideal stage model, a mass transfer model and a true moving bed approach (TMB). The mass transfer model turned out to successfully simulate the concentration profiles inside the foam for a broad range of operating conditions, limited only to relatively wet foams and high ratios of superficial feed to gas velocity. The true moving bed approach seemed to be over-designed since axial dispersion was of less importance indicated by axial dispersion coefficients Dax scattering over several orders of magnitude for the whole range of operating conditions. The ideal stage model was not suitable for wet foams but it dominated in case of dry foams showing better fits compared to the other two models. Weniger zeigen

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Produktinformationen

Technische Daten

Erscheinungsdatum

29.09.2017

Sprache

Englisch

EAN

9783843932776

Herausgeber

Dr. Hut

Serien- oder Bandtitel

Technische Chemie

Sonderedition

Nein

Autor

Andreas Hofmann

Seitenanzahl

216

Einbandart

Taschenbuch

Schlagwörter

foam fractionation, Sauter diameter, stripping mode

Thema-Inhalt

T - Technologie, Ingenieurswissenschaft, Landwirtschaft, Industrieprozesse TD - Industrielle Chemie und Fertigungstechnologien TDC - Industrielle Chemie und Chemietechnologie

Höhe

210 mm

Breite

14.8 cm

Warnhinweise und Sicherheitsinformationen

Informationen nach EU Data Act

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