Abstract
Ultrasonic Irradiation (UI) is an emerging technology that is used to assist the CO2 absorption process. Even for the slow kinetic solvents without using any chemical promoter, high-frequency UI might enhance mass transfer during the absorption process. For this purpose, it is essential to study the performance of a high-frequency ultrasonic-assisted absorption system under varied operating conditions. The ultrasonic power is considered as one of the main parameters during the absorption of CO2. Thus, in this paper, the influence of ultrasonic power is presented using Methyl diethanolamine (MDEA) as a chemical solvent. The ultrasonic power has been varied from 0 to 15.3 W. The results tend to show a significant absorption rate enhancement for higher ultrasonic power. Moreover, they prove that the high-frequency ultrasonic absorption system has high potential to be utilized to enhance the absorption using promoter-free MDEA.
Highlights
Natural gas has fewer environmental issues than the other types of fossil fuels
The ultrasonic-assisted absorption system's performance is significantly dependent on the acoustic power and frequency
It is worth noting that ultrasonic power is the output of the ultrasonic system, while the total power is the input of the electrical power system
Summary
Natural gas has fewer environmental issues than the other types of fossil fuels. the demand for it is expected to rise by more than 60% until 2040 [1, 2]. Ultrasound defines as a sound with frequencies from 20 kilohertz up to several gigahertz [7] It has several applications in varoius research fields such as the food industry, medical treatment, cleaning, materials processing, or even enhancement of multiphase reactions [8, 9]. The basic concept of the ultrasonic chemical effect is the generation of free reactive radicals that form due to cavitation and improve the chemical kinetic reaction rate [20,21,22] Parameters such as frequency and power of the applied sound field, temperature, pressure, solvent properties, sonication time, or even the reactor's geometry may govern the sonochemical effect [8, 23]. The scope of this research work focuses on investigating the effect of ultrasonic power as a critical parameter on CO2 absorption using a slow kinetic solvent
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