Experimental Modeling and Optimization of CO₂ Absorption into Piperazine Solutions Using RSM-CCD Methodology.

The statistical importance was appraised applying the interactions, factors, and p -value of the model. As can be seen from Table 8 , the model p -value for CO 2 removal efficiency is 0.0003 and the model p -value for both CO 2 loading and N CO 2 is less than 0.0001, which shows the model parameters are considerable. It must be mentioned that a p -value less than 0.050 indicates that the model is significant in the response, and the value lower than 0.001 demonstrates that the model is highly significant in the response. p -values > 0.1 indicate that the model is insignificant. 20 , 53 , 54 Moreover, the model terms have a considerable result on the response because of the large F -value.

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