Abstract

This work investigated the methodology to simultaneously optimize the ozone and relative humidity composition for the NO x degradation using soil biofilter. Experiments were made as a function of inlet ozone concentration (0~1,770 ppb) and relative humidity (38~81%). Factorial design (2 2 +3) and response surface methodology by central composite designs were used to examine the role of two factors and optimal response condition on NO x degradation. It was found that a second-order response surface model can properly interpret the experimental data with an R 2 -value of 0.9730 and F-value of 71.83, based on which the maximum NO x degradation was predicted up to 92.8% within our experimental conditions.

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