Optimum Operating Parameters of Using Cupric Oxide as Catalyst for Methane Combustion Reaction

摘要

This study discussed the influence of the combustion reaction side on the catalyst in the chemical looping combustion. According to past studies, the cupric oxide among oxides as oxidizer has the best effect. In order to obtain cupric oxide with excellent performance, three kinds of solution were used to prepare cupric oxide as the catalyst, and the cupric nitrate series was found to have better performance. This study used the prepared cupric oxide as the catalyst, and used alumina as carrier to prepare the oxidizer for combustion to react with methane. The reactor designed by this laboratory was used for experiment. As the reaction tube has special requirement, the prepared oxidizer shall be made into ingot, and then filled in the reaction tube, the combustion reaction proceeds inside the high temperature furnace. This design is very applicable to the combustion reaction of oxidizer. The operating variables include methane concentration, total flow rate, temperature, and number of ingots. The optimum parameters can be found after multiple experiments. In order to carry out experiment efficiently, Taguchi experiment design was adopted, which included four conditional factors and three levels and nine groups of experiments. The results showed that the order of importance of conditional factors is operating temperature > methane concentration > number of catalyst ingot > total flow rate. The obtained optimum parameters are 1000°C, 400 ml/min, 5% and 3 ingots. This result can be used as reference for further design of combustion reaction.