An experimental study of acid gas absorption by method hybrid nanofluid spraying in the presence of continuous and alternating magnetic fields

• Main Authors: Reza Azimikia, Hossein Mazaheri, Ali Hassani Joshaghani, Ezatollah Joudaki
• Format: Article
• Language: English
• Published: Elsevier 2021-07-01
• Series: Journal of Materials Research and Technology
• Subjects: Hybrid nanofluid; Ventura detergent; Gas absorption; Oxide nickel nanoparticles; Carbon nanotubes
• Online Access: http://www.sciencedirect.com/science/article/pii/S2238785421004531

To extract carbon dioxide from the air stream, a venture detergent on a semi-industrial scale was used in this article. The effects of various parameters, such as the inlet air flow to the Venture detergent, the solvent flow, the effect of the form of magnetic field and its strength on the distribution of solvent droplets, the pressure drop in the bottleneck of the Venture detergent, the solvent wastage during the washing process, are presented in this paper. Using aqueous nanofluid solvent/carbon oxide-nanotubes in the presence of surfactants SDS and CTAB, the absorption of carbon dioxide was investigated. The findings of the possible DLS and Zeta experiments have shown that the nanoparticles used in this paper are stable in the vicinity of the surfactant and that their surface charges are sufficient to keep the nanoparticles from binding together in the base fluid. The findings revealed that the ratio of local to moderate flux decreases with increasing the radius of the Venture detergent throat, which means that much of the water in the middle of Venture flows. The results have revealed that the droplet distribution diagram shows that the distribution of solvent droplets can be more uniform by reducing the solvent volume flow, so low flows are ideal for the separation process in the absence of a magnetic field and also The findings also revealed that nanoparticles inserted would almost always improve the efficacy of adsorption relative to the base fluid (along with surfactants). In each nanofluid, the maximum adsorption efficiency appears in a specific weight fraction of the nanoparticles. 1: 3, 1: 1, 3: 1, respectively) in the presence of CTAB surfactant in nanoparticle weight fractions of 0.5, 0.1, 0.05, 0.01 and 0.5%, respectively, and for in the absence of surfactant, the maximum amount of adsorption was observed in weight fractions of 0.5, 0.1, 0.05, 0.01, and 0.5%, increasing the flow rate of carbon dioxide gas to the inlet air from 1:20 to 1:15, the amount of absorption speed increased due to the increase of the driving force of this gas in the gas phase, and also by increasing the flow rate of carbon dioxide gas to the inlet air from 1: 15 to 1:10 The amount of absorption speed decreases due to the reduction of the absorption capacity as well as the increase in the gas remaining in the air stream. For nickel oxide nanoparticles as well as carbon nanotubes, it can be observed that for the case of using a mixture of nickel oxide nanoparticles (25%) and carbon nanotubes (75%) in the presence of CTAB surfactant, the maximum absorption efficiency and mass transfer molar flux Carbon dioxide gas is more than other forms, the main reason can be attributed to the nature of carbon nanotubes as well as nickel oxide nanoparticles. The results also showed that nickel oxide nanoparticles act as agitators which in microscopic dimensions cause the displacement of carbon nanotubes and due to their brown catheter movements cause micron vortices which increase the mass transfer at the surface of liquefied gas. Also, the amount of molar flux and carbon dioxide adsorption efficiency decreases with increasing nanoparticle concentration from a maximum of 5% by mass, the main reason for this decrease can be attributed to the increase in nanofluid viscosity, which increases significantly with increasing nanoparticle concentration.