Ce-Mn mixed oxides supported on glass-fiber for low-temperature selective catalytic reduction of NO with NH3

被引：65

作者：

Li Le ^{[1
]}

Diao Yongfa ^{[1
]}

Liu Xin ^{[1
]}

机构：

[1] Donghua Univ, Sch Environm Sci & Engn, Shanghai 201620, Peoples R China

来源：

JOURNAL OF RARE EARTHS | 2014年 / 32卷 / 05期

基金：

国家高技术研究发展计划(863计划);

关键词：

Mn-Ce mixed oxides; glass-fiber; NO; low-temperature SCR by NH3; SO2; poisoning; rare earths; MN-CE/TIO2; CATALYST; SUPERIOR CATALYST; SCR; CERIA; TIO2; PERFORMANCE; MNOX/TIO2;

D O I：

10.1016/S1002-0721(14)60086-7

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Samples of cerium-manganese oxides supported on modified glass-fiber with different Ce/Mn molar ratios (Ce-Mn/GF) were prepared by an impregnation method and tested for low-temperature (80-180 degrees C) selective catalytic reduction (SCR) of NO with ammonia. This brand-new technology could remove NO and particles matter from coal-fired flue gas. The surface properties of the catalysts were examined by means of Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), and scanning electron microscopy (SEM). The experimental results showed that the catalyst with a Ce/Mn molar ratio of 0.2 obtained high activity of 87.4% NO conversion at 150 degrees C under a high space velocity of 50000 h(-1). Deactivation poisoned by SO2 still occurred, but the Ce-Mn/GF(0.2) catalyst performed desirable tolerance to SO2 with decreasing 50% in 40 min and then maintaining at about 30% NO conversion. Characterization results indicated that the excellent low-temperature catalytic activity was related to the high specific surface area, pore structure, and amorphous phase.

引用

页码：409 / 415

页数：7

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