Abstract
Microbubbles are small gas-filled bubbles which have wide application in various industries. The stability of microbubble is of primary concern for the application of microbubble. In this research, the stability of microbubble dispersion generated using CTAB surfactant is analyzed by drainage mechanism. The stability of microbubble dispersion is studied on the basis of the half-life of microbubble dispersion. Microbubble dispersion gas fraction and apparent rise velocity of interface of microbubble dispersion are also calculated. The size of microbubble is estimated from the apparent rise velocity of interface of microbubble dispersion. Further, silica nano-particles are added to the surfactants to study their effect on the stability of microbubble dispersion. The observed results clearly indicate that the stability of microbubble dispersion is significantly affected by the surfactant concentration and the weight of silica nano-particle in the liquid. Similar results were observed for the apparent rise velocity of interface and bubble size of dispersion. The present work may be beneficial for the application of microbubble in various chemical and biochemical industries and scientific community.
Highlights
Microbubbles are gas bubbles having size in the range 1 to 100 μm
The stability of microbubble dispersion is analysed by using drainage mechanism
The gas holdup of microbubble dispersion is found to be affected by physiochemical properties of the liquid
Summary
Microbubbles are gas bubbles having size in the range 1 to 100 μm. They are used in various processes like removal of fine metal oxide particle, separation of fine suspended carbon, oxidation of benzene, synthesis gas fermentation, sludge solubilization, treatment of industrial waste water and various environmental process (Parmar and Majumder, 2013). Feng et al (2009) investigated the various factors affecting the drainage mechanism of microbubble dispersion. They concluded that surfactant and electrolyte concentrations and pH are the three main process parameters that significantly effects the stability. Parmar and Majumder (2015) concluded that increasing surfactant concentration can significantly enhance the dispersion stability. Efforts are required to examine the complex drainage mechanism of microbubble dispersion, in order to enlarge this technology at large scale. The objective of the present article is to analyse the effects of nanoparticle and surfactant concentration on the stability of microbubble dispersion. The present article aimed to examine the effects of silica nanoparticle on hydrodynamic properties of microbubble dispersion
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