The effect of hydrodynamic parameters on the production of Pickering emulsions in a baffled stirred tank

Date

2019-10-01

Author

Abdulrasaq, Usman K.
Ayrancı Tansık, İnci

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

142
views

0
downloads

Pickering emulsions are potential industrial scale alternatives to surfactant-based emulsions. The stability of Pickering emulsions depends on the physicochemical nature of the liquid-particle interface and the hydrodynamic conditions of the production process. This article investigates the effect of hydrodynamic conditions on the drop size of concentrated Pickering emulsions in baffled stirred tanks. Oil in water emulsions composed of silicon oil, water, and hydrophilic glass beads as stabilizing particles were produced. Two impellers were used at different sizes: Rushton turbine (RT) and pitched blade turbine. The effects of power per mass, Reynolds number, tip speed, and Weber number on the droplet sizes were studied. The energy dissipated around the impeller and the size of the impeller high shear zone were found to be critical to the emulsion droplet sizes. The breakup and droplet-particle contact mechanism of the RT was found to be more favorable for the production of the Pickering emulsions.

Subject Keywords

Biotechnology, Environmental Engineering, General Chemical Engineering

URI

https://hdl.handle.net/11511/36035

Journal

AICHE JOURNAL

DOI

https://doi.org/10.1002/aic.16691

Collections

Department of Chemical Engineering, Article

Suggestions

OpenMETU
Core

Effect of preparation and operation parameters on performance of polyethersulfone based mixed matrix gas separation membranes Karatay, Elif; Yılmaz, Levent; Department of Chemical Engineering (2009) Membrane processes have been considered as promising alternatives to other competing technologies in gas separation industry. Developing new membrane morphologies are required to improve the gas permeation properties of the membranes. Mixed matrix membranes composing of polymer matrices and distributed inorganic/organic particles are among the promising, developing membrane materials. In this study, the effect of low molecular weight additive (LMWA) type and concentration on the gas separation performance o...
Development of different carbon supports for proton exchange membrane fuel cell electrocatalysts Güvenatam, Burcu; Eroğlu, İnci; Bayrakçeken, Ayşe; Department of Chemical Engineering (2010) Proton exchange membrane (PEM) fuel cell technology is promissing alternative solution to today’s energy concerns providing clean environment and efficient system. Decreasing platinum (Pt) content of fuel cell is one of the main goals to reduce high costs of fuel cell technology in the way of commercialization. In this target, porous carbons provide an alternative solution as a support material for fuel cell electrocatalysts. It is also essential to increase surface area of carbon support material to have w...
A NEW CORRELATION FOR TWO-PHASE PRESSURE DROPS IN FULLY DEVELOPED DILUTE SLURRY UP-FLOWS THROUGH AN ANNULUS Oezbelge, Tuelay A.; Camciuenal, Guelden (Informa UK Limited, 2009-01-01) The prediction of two-phase pressure drops is important in the design of fluidized beds, heat exchangers, slurry transport lines, annular risers in reactors, driers, and other applications of particulate flows. Experimental data for liquid-solid up-flows through annuli are very limited. In this study, a correlation was developed for predicting two-phase pressure drops via Euler number (Eutp) for liquid-solid suspension up-flows in the fully developed flow region of an annulus in terms of mixture Reynolds nu...
Grinding kinetics of steady-state feeds in locked-cycle dry ball milling Acar, Cemil; Hoşten, Çetin (Elsevier BV, 2013-11-01) The size-discrete breakage rate and distribution parameters of the grinding kinetic model are mostly determined in laboratory batch mills using single-size feeds. However, there is evidence in the literature that particle size distribution in the mill affects the breakage parameters. Previous work studying this effect was mostly conducted with feeds whose size distributions were not closely representative of those normally dealt with in industrial mills. This study was undertaken with the main purpose of in...
A Modeling Study on the Layout Impact of with-in-die Thickness Range for STI CMP Kıncal, Serkan; BAŞIM DOĞAN, GÜL BAHAR (2012-10-01) Chemical Mechanical Planarization process has a proven track record as an effective method for planarizing the wafer surface at multiple points of the semiconductor manufacturing flow. One of the most challenging aspects of the CMP process, particularly in applications like Shallow Trench Isolation (STI), is the difference in relative removal rates of the different materials that are being polished. A certain amount of over-polish is required to clear oxide on top of the nitride, however, this over-polish m...

Citation Formats

U. K. Abdulrasaq and İ. Ayrancı Tansık, “The effect of hydrodynamic parameters on the production of Pickering emulsions in a baffled stirred tank,” AICHE JOURNAL, pp. 0–0, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/36035.