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Chemical Engineering - Lab Report Example

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The following lab report entitled "Chemical Engineering" dwells on the experiment quantification on Raschig Rings. According to the text, in the process of bio-oxidation, gas-liquid-solid phase fluidized beds were functional for the treating wastewater…
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Chemical Engineering
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"Chemical Engineering"

Download file to see previous pages This is done in order to understand regime flow of gas-liquid and liquid-solid fluidization. Ceramic Raschig rings, air, and water are used as the respective solid, gas and liquid phases respectively. The experiment was done in a 2m-height, 100 mm ID vertical Plexiglas column. The column has 3 parts; the part of gas-liquid disengagement, test part and part of the gas-liquid distribution. Measurements of Bed pressure were made to estimate the least velocity of liquid fluidization. By maintaining the velocity of the gas, the liquid velocity is altered and the influence on expansion ratio, pressure drop, and least velocity of liquid fluidization was calculated for static bed height and various particle size and.
Gas-Liquid-Solid-Phase fluidized beds are in most cases applicable in physical processes (Murayama, 2005). For instance, the process of a fixed bed, where both countercurrent and concurrent liquid and gas flow are permitted, and for either of these both flow of bubble, in which the gas flow is discrete, and dribble and the liquid is the continuous phase. This way, the gas forms a continuous phase and the liquid more or less dispersed (Epstein, 2009). Three-phase fluidization can be categorized largely into 4 modes.
The first mode is mode I-a; co-current gas-liquid-solid –phase fluidization with liquid as the continuous phase co-current three-phase fluidization. The second mode is mode-I-b that is featured by gas as the continuous phase. The third being mode II-a; inverse three-phase fluidization. The fourth, TCA mode II-b fluidization has characteristics of a contact absorber that is turbulent. Modes II-b and II-a are attained by a flow of liquid and gas that is countercurrent. Amongst which the most striking one is the co-current three-phase fluidization with the liquid as the continuous phase (Murayama, 2005). ...Download file to see next pagesRead More
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