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Two (L-L) and three (G-L-L) phase extraction processes in capillaries with heterogeneous surface wettability.

Timmerhuis, N.A.B. (2017) Two (L-L) and three (G-L-L) phase extraction processes in capillaries with heterogeneous surface wettability.

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Abstract:The effect of heterogeneous surface wettability was studied for two and three phase extraction. The model system consisted of 1 wt% acetic acid (solute) in water (carrier) with 1-octanol as solvent, nitrogen gas was added for the three phase extraction. A round capillary of 1.05 mm inner diameter and 150 mm length was used to study the influence. Two and three phase extraction performance was determined in a homogeneous hydrophilic capillary and two capillaries with heterogeneous wettability (alternating hydrophilic and hydrophobic patcher) with patterning lengths of 1.0 and 6.0 mm. Phase inversion, adhesion and passing was shown for the two phase system in the 6.0 mm patterning while only adhesion and passing was shown for the 1.0 mm patterning. The three phase extraction showed passing with organic phase as continuous phase instead of water, which is the expected pattern for a hydrophobic capillary. The extraction performance was enhanced primarily by the two phase extraction in heterogeneous capillary, where the organic to water ratio can be decreased from 2 to 1 with 6.0 mm patterning. For the three phase extraction the organic to water ratio could only be lowered to 1.33 (compared to 2) with the 6.0 mm patterning.
Item Type:Essay (Master)
Faculty:TNW: Science and Technology
Subject:35 chemistry, 58 process technology
Programme:Chemical Engineering MSc (60437)
Link to this item:http://purl.utwente.nl/essays/73897
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