Abstract
Abstract Nitric oxide (NOx) abatement by a two-stage system composed of nonthermal plasma (NTP) followed by the selective catalytic reduction with C3H8 (C3H8-SCR) over the Co-In/H-beta catalyst was investigated at a relativity low temperature range from 548 to 598 K. The combination system shows better synergy at low temperature. Optimum active temperature of Co-In/H-beta in the complex system is shifted from 648 to 598 K compared with that in C3H8-SCR. The highest NOx conversion is over 98%. In contrast to treatment by the NTP, the two-stage system converts mostly NO to nitrogen; without NO2, nitrogen-containing and organic components formed. The synergetic effect of the combination system is enhanced with the C3H8 concentration and O2 content.
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