Abstract
BackgroundReaction kinetics was an important tool for quantitative expression of micro-chemical processes. In this study, a kinetic evaluation method of microwave liquid-phase desorption mechanism was established, which was of great value to reveal the non-thermal effect of microwave desorption. MethodsDesorption kinetics of basic aluminum sulfate (aluminum base) desulfurization rich liquid were monitored with a microwave simultaneous cooling system. The effect of microwave power on its chemical reaction was investigated by linear and nonlinear regression analysis. Significant findingsThe kinetic analysis showed that the pre-exponential factor and activation energy decreased with the increase of microwave power, and the dependence on microwave power was more consistent with the first-order linear model and the second-order polynomial model. At the same temperature, the microwave desorption rate was 1.3–2.6 times that of water bath thermal desorption. At the same desorption reaction rate, the microwave desorption temperature was 10 K–20 K lower than that of thermal desorption. Compared with thermal desorption, although the reaction order did not change under different microwave power, the pre-exponential factor and activation energy decreased, and the reaction rate constant was about 1.1–2.1 times that of the same temperature.
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