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http://dx.doi.org/10.7316/KHNES.2012.23.3.199

Effect of Change of Hydrogen Rich Reductant on HC-SCR over Co-Pt/ZSM5 Catalyst  

Kim, Seong-Soo (Waste Energy Research Center, Korea Institute of Energy Research)
Kim, Dae-Young (Dept. of Chemical Eng., Sogang University)
Oh, Se-Young (Dept. of Chemical Eng., Sogang University)
Yoo, Seong-Jeon (Dept. of Environmental and Chemical Eng., Seonam University)
Sur, Young-Sek (Dept. of Chemical Eng., Soonchunhyang University)
Kim, Jin-Gul (Dept. of Chemical Eng., Soonchunhyang University)
Publication Information
Transactions of the Korean hydrogen and new energy society / v.23, no.3, 2012 , pp. 199-206 More about this Journal
Abstract
HC-SCR was conducted over Co-Pt/ZSM5 catalyst coated over 200 cpsi cordierite in the condition of atomspheric pressure and $200^{\circ}C-500^{\circ}C$. Weight ratio of Co/Pt determined from EDX analysis was 8/2, which was almost equal to the weight ratio at preparation step. XPS showed that nitrates within cobalt precursor and chlorine withn Pt precursor were removed. TEM result demonstrated that crystallite size of cobalt and Pt was under 5nm. Among these tested hydrocarbon reductants, isobutane ($i-C_4H_{10}$) showed the highest de-$NO_x$ yield of 80% under the condition of the mole ratio of reductant/NOx=1.0 at $180^{\circ}C$. De-$NO_x$ yield from HC-SCR was increased as the carbon number of hydrocarbon reductant was increased. The decrease of bonding energy between C and H of HC reductant played a role to increase of de-$NO_x$ yield, which indicated that the dissociation step of C-H bond of hydrocarbon molecule might be the rate determining step of HC-SCR. The increase of oxygen concentration in the feed resulted in the decrease of de-$NO_x$ yield but the increase of CO and $N_2O$ yield.
Keywords
HC-SCR; de-$NO_x$; Isobutane; Co-Pt/ZSM5;
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