| Summary: | 碩士 === 元智大學 === 化學工程研究所 === 87 === In gas-liquid reacting systems, recirculation of gas from the headspace of tank back into the process liquid is required owing to the limited residence time and poor gas utilization. Commonly, methods of linking a series of tanks or using a compressor to circulate the unreacted gas back to the reactor were adopted to solve these problems. Recycling of unreacted gas is a importance purpose.
The major purpose of this study is to improve a gas induced reactor, use the high gas utilization, both adsorption and chemical reactor can occur simultaneously on the surface of granular activated carbon(GAC) to design a new gas induced catalytic oxidation reactor. Use the new reactor to dispose of industrial wastewater and phenol.
Control variables employed in the experimental investigations included the impeller speed, inlet ozone concentration, amount of GAC, ozone gas flow rate, pollutant concentration and reaction temperature, As results, increasing of GAC and inlet ozone concentration can be able to raise pollutant(COD) and phenol removal.
Test results also revealed that a short period of GAC adsorption exists befor ozonation causes significant oxidation of pollutant on the GAC surfaces. Such and ozone enhanced oxidation effected an excellent regeneration of GAC and enabled GAC reuse. A maximun pollutant(COD) removal at 90 % and phenol removal at 99.5 %.
Inferred the reactive organization and reactive constant from the experimental results. Kinetic studies using the observed data also showed that a short period of rapid adsorption preceded chemicial oxidation caused by ozonation, However, the combined GAC adsorption and chemical oxidation could be faithfully described by generalized and lump kinetic model.
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