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Acta Chimica Sinica ›› 2011, Vol. 69 ›› Issue (13): 1524-1532. Previous Articles Next Articles
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叶青*, 闫立娜, 霍飞飞, 王海平, 程水源, 康天放
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新型OMS双功能催化体系低温净化VOCs研究;新型双功能“复合OMS”低温催化净化VOCs;基于低温催化净化VOCs双功能OMS的研究
YE Qing, YAN Li-Na, HUO Fei-Fei, WANG Hai-Ping, CHENG Shui-Yuan, KANG Tian-Fang
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Fe pillared sodium-modified sepiolite (Fe-NaPILCS) was prepared by intercalation polymerization of iron hydroxyl ions with sodium-treated sepiolite and then calcined at 450 ℃ for 4 h. Cu/Fe-NaPILCS and Cu/Fe-NaSep were prepared by impregnation of Fe-NaPILCS and Fe-NaSep, respectively, with an aqueous solution of Cu-nitrate. These samples were characterized by means of X-ray diffraction (XRD), TGA-DTG, N2-sorption analysis, H2-temperature-programmed reduction (TPR), X-ray photoelectron spectroscopy (XPS) techniques and their catalytic performance for the selective catalytic reduction (SCR) of NO by C3H6 were also studied. The results of N2-desorption/adsorption and TGA-DTG showed that due to pillaring, Fe-NaPILCS revealed much higher surface area, pore volume and thermal stability than that of Sep. According to the result of XRD and XPS, there co-exist Fe3+/Fe2+ and Cu2+/Cu+ and also the strong interaction among Cu, Fe and support over Cu/Fe-NaPILCS and Cu/Fe-NaSep catalysts. H2-TPR showed that Cu/Fe-NaPILCS possessed high amount of isolated Cu2+ species. Cu/Fe-NaPILCS display more significant activity for selective reduction of NO with C3H6 than that of Cu/Fe-NaSep. This maybe related to its higher surface area, pore volume, better catalytic reduction performance and high amount of isolated Cu2+ species.
Key words: Cu/Fe-NaPILCS, nitric oxides, propylene, selective catalytic reduction
CLC Number:
O 643
YE Qing, YAN Li-Na, HUO Fei-Fei, WANG Hai-Ping, CHENG Shui-Yuan, KANG Tian-Fang. Copper Impregnated Fe-pillared Sodium-treated Sepiolite (Fe-NaPILCS) for Selective Catalytic Reduction of NO with C3H6[J]. Acta Chimica Sinica, 2011, 69(13): 1524-1532.
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