Application of acoustic models for polydisperse emulsion characterization using ultrasonic spectroscopy in the long wavelength regime
| Autor: | Darlan Bonetti, Rosiane Lopes da Cunha, Ana Maria Frattini Fileti, Carlos Alexandre Moreira da Silva, Samuel Vitor Saraiva, Luiz O. V. Pereira, Flávio Vasconcelos da Silva, Ricardo Tokio Higuti |
|---|---|
| Přispěvatelé: | Universidade Estadual de Campinas (UNICAMP), Universidade Estadual Paulista (Unesp), CENPES |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Materials science
Opacity Scattering Attenuation Emulsion Ultrasonic spectroscopy 02 engineering and technology Droplet characterizations 010402 general chemistry 021001 nanoscience & nanotechnology 01 natural sciences Light scattering Laser diffraction analysis Attenuation spectra 0104 chemical sciences Computational physics Colloid and Surface Chemistry Particle-size distribution Particle Acoustic models Particle size 0210 nano-technology |
| Zdroj: | Web of Science Repositório Institucional da UNESP Universidade Estadual Paulista (UNESP) instacron:UNESP |
| Popis: | Made available in DSpace on 2020-12-10T17:40:55Z (GMT). No. of bitstreams: 0 Previous issue date: 2020-10-05 Petrobras ANP Ultrasonic spectroscopy is a technique that often has been used for measuring the particle size distribution in suspensions and emulsions. The ability to analyze concentrated heterogeneous systems and optically opaque samples, without the need for dilution, is the major advantage over alternative technologies, such as light scattering method. Several physical models used to interpret the measured attenuation spectra have been applied considering monodisperse particles. However, the polydisperse particle distributions are found in many practical applications, for example, in crude oil emulsions during droplet coalescence or flocculation. The polydispersity effects are usually important and need to be incorporated into theoretical predictions. For this work, acoustic spectroscopy within the frequency range 6-14 MHz was used to measure the droplet size distribution of water-in-sunflower oil emulsions for a volume fraction range from 10 to 50 % and considering monomodal size distribution. The results obtained from experimental attenuation spectra have been compared with the predictions of acoustic models from simple and multiple scattering, extended multiple scattering, and other simpler models of propagation usually applied to the long wavelength regime. The droplet size distributions from theoretical and experimental attenuation spectra were calculated with a deconvolution algorithm. The size distribution results obtained by ultrasonic spectroscopy showed good agreement with those obtained by laser diffraction analysis. The findings indicate that the methodology employed in this study is suitable for polydisperse particle size characterization for moderate concentrations up to 20 %. Univ Estadual Campinas, Sch Chem Engn, Av Albert Einstein 500, BR-13083852 Campinas, SP, Brazil Sao Paulo State Univ, Sch Engn, Ilha Solteira, SP, Brazil Univ Estadual Campinas, Sch Food Engn, Campinas, SP, Brazil CENPES, Petrobras R&D Ctr, Rio De Janeiro, Brazil Sao Paulo State Univ, Sch Engn, Ilha Solteira, SP, Brazil |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|