{"title":"Permeation Network Model for the Swelling of Water-in-Oil-in-Water (W/O/W) Emulsions","authors":"Gesse Roure, Robert H. Davis","doi":"10.1021/acs.iecr.4c02588","DOIUrl":null,"url":null,"abstract":"Fast agglomeration by emulsion binders was recently developed as an alternative to froth flotation. It involves mixing an aqueous particle suspension with a saltwater-in-oil emulsion that swells due to osmosis and captures nearby hydrophobic particles. We previously developed a model by considering the binary interactions between single droplets and particles. In practical situations, however, particles collide with droplet agglomerates, resulting in osmotic flux being limited by the permeation of water across the oil layers between droplets. In this paper, we propose a simple network model for permeation-dominated swelling kinetics. It considers spherical saltwater droplets packed inside a spherical oil droplet. The agglomerate is generated and relaxed using a swelling Monte Carlo algorithm, which gives rise to a dynamic permeation network with water permeation between the neighboring droplets. For smaller droplets, the salt concentration is similar to the concentration-boundary-layer profiles from the effective-diffusion model. The agglomerate swelling displays a fast expansion behavior followed by the agglomerate radius increasing with the square root of time for longer times. Lower volume fractions and larger droplets result in slower growth and greater sensitivity to changes in the microstructure.","PeriodicalId":39,"journal":{"name":"Industrial & Engineering Chemistry Research","volume":"30 1","pages":""},"PeriodicalIF":3.8000,"publicationDate":"2024-12-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Industrial & Engineering Chemistry Research","FirstCategoryId":"5","ListUrlMain":"https://doi.org/10.1021/acs.iecr.4c02588","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"ENGINEERING, CHEMICAL","Score":null,"Total":0}
Permeation Network Model for the Swelling of Water-in-Oil-in-Water (W/O/W) Emulsions
Fast agglomeration by emulsion binders was recently developed as an alternative to froth flotation. It involves mixing an aqueous particle suspension with a saltwater-in-oil emulsion that swells due to osmosis and captures nearby hydrophobic particles. We previously developed a model by considering the binary interactions between single droplets and particles. In practical situations, however, particles collide with droplet agglomerates, resulting in osmotic flux being limited by the permeation of water across the oil layers between droplets. In this paper, we propose a simple network model for permeation-dominated swelling kinetics. It considers spherical saltwater droplets packed inside a spherical oil droplet. The agglomerate is generated and relaxed using a swelling Monte Carlo algorithm, which gives rise to a dynamic permeation network with water permeation between the neighboring droplets. For smaller droplets, the salt concentration is similar to the concentration-boundary-layer profiles from the effective-diffusion model. The agglomerate swelling displays a fast expansion behavior followed by the agglomerate radius increasing with the square root of time for longer times. Lower volume fractions and larger droplets result in slower growth and greater sensitivity to changes in the microstructure.
期刊介绍:
ndustrial & Engineering Chemistry, with variations in title and format, has been published since 1909 by the American Chemical Society. Industrial & Engineering Chemistry Research is a weekly publication that reports industrial and academic research in the broad fields of applied chemistry and chemical engineering with special focus on fundamentals, processes, and products.