Study on the Effect of Preparation Parameters of K<sub>2</sub>CO<sub>3</sub>/Al<sub>2</sub>O<sub>3</sub> Sorbent on CO<sub>2</sub> Capture Capacity at Flue Gas Operating Conditions
- 1 Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran
- 2 Department of Chemical Engineering, Isfahan University of Technology, Isfahan, Iran
Abstract
In this paper, study on the effect of preparation conditions of K 2 CO 3 /Al 2 O 3 sorbent was done. Box - Behnken design was applied to study the influence of four parameters involve initial solution concentration, impregnation time and calcina tion step temperature and time. A quadratic model was used to correlate the sorbent capture capacity. The model was used to calculate the optimum conditions for preparing sorbent. From the analysis of variance (ANOVA), the most in fluential factor on each experimental design response was identified. The potassium-based sorbents used in this study were prepared by impregnating K 2 CO 3 on Al 2 O 3 support. The CO 2 capture capacity was measured in the presence of H 2 O in a fixed-bed reactor at CO 2 capture temperature of 60°C using breakthrough curves. The optimum sorbent pre pared by this method showed CO 2 capture capacity of 77.21 mg CO 2 /g sorbent. It was observed that the experimental values obtained were in good agreement with the values predicted by the model, with relatively small errors between the predicted and the actual values. The results obtained in this study can be used as basic data for study on design and operating condition optimization of CO 2 capture process using these sorbents.
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