화학공학소재연구정보센터
Journal of Industrial and Engineering Chemistry, Vol.7, No.2, 105-109, March, 2001
Improved Decomposition Efficiency of Nitrogen Oxides using Superposing SPCP and Corona Discharges
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The superposing effect of an SPCP(Surface discharge-induced Plasma Chemical Process) and corona discharge were studied for the removal of NOx from industrial flue gases. The NOx removal rates caused by an SPCP, corona discharge, and superposing discharge were monitored and compared. The parameters included the concentration, flow rate of gas, frequency, and type of discharge. The experimental results showed that the NOx removal rate with a superposing discharge was 10 similar to 30% higher than that with the other two modes. The maximum obtainable NOx removal rate with only a SPCP (18 W) on a corona discharge (7 W) was 85% and 12%, respectively. However, the combination of the two modes, produced a 95% NOx removal rate with a discharge power of 18 W with a lower frequency (450 Hz). A higher NOx removal rate was observed with a lower frequency in the upper electrode in the combined reactor and a higher frequency in the lower electrode. Accordingly, corona discharge (below 600 Hz) in the current study, a combined with an SPCP electrode (at a lower power) appeared to be the best method to remove NOx.
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