Effects of the presence and absence of nanoparticles in the hold-up and hydrodynamic velocities in the pulsed disc and doughnut column by using central composite design method. (May 2022)

• Record Type: Journal Article
• Authors: Torkaman, Rezvan; Aboudzadeh Rovais, Mohammad Reza; Heydari, Mehran; Torab-Mostaedi, Meisam; Asadollahzadeh, Mehdi
• Is Part Of: Progress in nuclear energy. Volume 147(2022)
• Publication Date: 2022-05
• Subjects: Dispersed phase hold-up -- Slip and characteristic velocities -- Silica nanoparticles -- Central composite design method -- Pulsed disc and doughnut column; Nuclear energy -- Periodicals; Nuclear engineering -- Periodicals; 333.7924
• DOI: 10.1016/j.pnucene.2022.104217
• Languages: English
• ISSNs: 0149-1970

Abstract

Abstract: The pulsed disc and doughnut column (PDDC) presents a valuable and profoundly satisfying solution for recovering and purifying components from mixtures when a separation challenge involves purifying a liquid or recovering components from mixtures. Furthermore, because of their improved mass transfer and efficiency, the application of nanofluids within liquid-liquid extraction systems has lately received with increased interest. In the behavior of silica nanoparticles (0, 0.025, and 0.05 wt percent), the hydrodynamic velocities and dispersed phase hold-up between the aqueous and organic phases were measured. The central composite design (CCD) was adopted to assess the impacts of three running parameters on slip velocity (Vs ) and dispersed phase hold-up (φ) at five levels. The findings revealed that higher intensity and higher aqueous phase velocity led to the decrement of slip velocity, and increment of hold-up. The higher number of droplets into column leads to the larger values for Vs, and φ. The correlation coefficients (R 2 ) equals to 0.9627, and 0.9838 were obtained for hold-up and slip velocity with the predicted quadratic model with the presence of 0.025% nanoparticles. The presence of nanoparticles increased the dispersed phase hold-up and a decrease in slip velocity, which was connected to a reduction of interfacial tension with nanofluids, Brownian motion of nanoparticles, and a negative impact on droplet stability due to increased internal mixing inside droplets. A CCD proposes new and simple experimental relationships as the slip velocity and dispersed phase hold-up.