Mass transfer under sonic fields
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"The field of mass transfer is one of great interest to chemical engineering. An understanding of this field is vital in the design of many types of chemical processing equipment, particularly in the areas of distillation, extraction, absorption, adsorption, and reactor analysis and design. Generally it is a main goal for engineers to get high mass transfer rates. Therefore much research on mass transfer was devoted to find a better way to get higher mass transfer rates, understanding the mechanism, and applying the results to industrial processes. Some of the factors which influence the mass transfer rate are enumerated: 1. The mass transfer area of the interphase 2. The driving force between phases 3. Hydrodynamic conditions at the interface between phases 4. Contact time of the two phases 5. Physical properties of the two phases The purpose of this investigation was to study the influence of sonic vibration on COg gas absorption into tap water. Naturally, each bubble has its own characteristic vibrational frequency which depends on its size and composition as well as the medium surrounding it (14). Therefore, if the driving sonic vibration is at the bubble's resonant frequency, the flow region in the immediate vicinity of the bubble's surface is affected so that the diffusion resistance is reduced, the bubble surface area is increased, and the contact time is increased (14). Firstly, the study was to determine if the mass transfer rate is increased with the sonic vibration over that without sonic vibration. Therefore the absorption percentage with sonic vibration was compared with that without sonic vibration. Secondly, the absorption rate as a function of one of the variables stated below was measured in order to find the maximum mass transfer conditions. The variables examined are: 1. Median frequency 2. Sweep rates of the sonic vibration 3. Sweep ranges of the sonic vibration 4. Column height. Thirdly, the absorption rate as a function of the sonic power to the system was measured to understand the power requirement for the gas absorption."--Introduction
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This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivs 3.0 License.