Citation:
LI Qiao-yan, HOU Ya-qin, HAN Xiao-jin, HUANG Zhang-gen, GUO Qian-qian, SUN De-kui, LIU Jian-dong. Selective catalytic reduction of NO with NH3 over activated carbon impregnated with melamine at low temperature[J]. Journal of Fuel Chemistry and Technology,
;2014, 42(4): 487-493.
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N-doped activated carbons (ACM) was obtained by impregnated activated carbon (AC) with melamine (M). The relationship between the impregnated time and calcination temperature on the nitrogen content and NH3-SCR activity was investigated. Results showed that SCR activity of ACM was higher than original AC. For ACM-5-900 was about 51.67% at 80 ℃ while AC was about 21.92%. Characterizations of BET, element analysis and XPS were employed to study the structural properties, nitrogen contents and distribution of nitrogen-containing groups of ACM. Results indicated that NO conversion of ACM was influenced by the form of nitrogen-containing functional groups rather than the nitrogen content. The NO+O2-TPD revealed that nitrogen-containing surface groups of ACM facilitated the adsorption and oxidation of NO, leading to the higher NO conversion. However, SO2 played an inhibit role on NO conversion of ACM.
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Keywords:
- DeNOx,
- activated carbon,
- SCR,
- N-containing groups
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