Separation of Emulsions with Fibrous Filter-Coalescers
| Autor: | Samson Ng, Aurelio Stammitti-Scarpone, Opeyemi J. Ajogbeje, Edgar Acosta, Tolbert Akanni, Shuwen Cao |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Coalescence (physics)
Materials science Froth treatment Drop (liquid) 02 engineering and technology Surfaces and Interfaces 010402 general chemistry 021001 nanoscience & nanotechnology Condensed Matter Physics 01 natural sciences 6. Clean water Coalescer 0104 chemical sciences law.invention Colloid Chemical engineering Settling law Emulsion Electrochemistry General Materials Science 0210 nano-technology Spectroscopy Filtration |
| Zdroj: | Langmuir. 37:7630-7642 |
| ISSN: | 1520-5827 0743-7463 |
| DOI: | 10.1021/acs.langmuir.1c00333 |
| Popis: | During froth treatment, a water-in-diluted bitumen emulsion is obtained. The emulsified water contains chloride ions that form hydrochloric acid in downstream oil processing, leading to catalyst deactivation and equipment corrosion. Emulsified water, drops smaller than 10 μm, cannot be effectively removed by gravity settling and centrifugation to below 2 wt %. In this work, a filter-coalescer was used to promote the coalescence and separation of water-in-bitumen emulsion. The larger water drops (>300 μm) exiting the coalescer undergo gravity settling, reducing the water content in diluted bitumen emulsions to values lower than 0.1 vol %. The performance of the coalescer was interpreted via the colloid filtration theory of Rajagopalan and Tien (RT), improved in this work with a coalescence probability (CP) prefactor. This new RTCP framework was able to reproduce the experimental data, allowing its potential use as a predictive model for emulsion filtration and the operation of filter-coalescers. A capillary number analysis was used to account for the detachment of coalesced drops and interpret the drop sizes with different superficial velocities and bed porosities. |
| Databáze: | OpenAIRE |
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