A new experimental technique was developed to measure volumetric mass transfer coefficients in agitated gas-liquid systems utilizing the second-order reaction between ozone and indigo disulfonate. Under the proper operating conditions the reaction can be considered instantaneous relative to the mass transfer rate. Instantaneous reactions have not been used previously for gas-liquid mass transfer studies. / The experimental system was operated semi-batch with continuous gassing of a liquid batch. The reaction vessel was of traditional design for these studies, consisting of a cylindrical, baffled tank with a height equal to the diameter. An ozonated air stream was dispersed by a standard disc turbine. The ozone dissolves into the liquid phase and reacts with the indigo. The rate of gas absorption was followed by monitoring the depletion of the indigo reagent. Liquid samples were continuously withdrawn from the reactor through a flow-cell and analyzed for their absorbance at 610 nanometers. An advantage of the technique is that the analysis is simple and highly accurate. / Additionally, a model was developed to analyze the unsteady-state absorption data. The model uses penetration theory to calculate a value for the mass transfer coefficient assuming either the gas is completely backmixed or in plug flow. / The mass transfer coefficient data were correlated as a function of power input and gassing rate. This is the traditional method of representing data and there is a great deal of variation in the values reported. The derived correlation matches the literature reasonably well, although the data do show a greater dependence on the gassing rate than most reported correlations. / As a model system, the instantaneous reaction technique holds promise for agitated absorption studies. A wide-range of systems could be modeled without affecting the instantaneous nature of the reaction by using additives to match the physical properties desired. The technique offers advantages over other popular chemical methods with its low ionic strengths and its use of penetration theory to describe the interfacial hydrodynamics. / Source: Dissertation Abstracts International, Volume: 51-11, Section: B, page: 5466. / Major Professor: Thomas R. Hanley. / Thesis (Ph.D.)--The Florida State University, 1990.
| Identifer | oai:union.ndltd.org:fsu.edu/oai:fsu.digital.flvc.org:fsu_78332 |
| Contributors | Ridgway, Darin., Florida State University |
| Source Sets | Florida State University |
| Language | English |
| Detected Language | English |
| Type | Text |
| Format | 319 p. |
| Rights | On campus use only. |
| Relation | Dissertation Abstracts International |
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