Low-temperature SCR of NOx with NH3 over carbon-ceramic supported catalysts

被引：159

作者：

Valdés-Solís, T ^{[1
]}

Marbán, G ^{[1
]}

Fuertes, AB ^{[1
]}

机构：

[1] CSIC, Inst Nacl Carbon, Oviedo 33011, Spain

来源：

APPLIED CATALYSIS B-ENVIRONMENTAL | 2003年 / 46卷 / 02期

关键词：

vanadium catalyst; manganese catalyst; carbon-ceramic monolith; water; SO2; arsenic;

D O I：

10.1016/S0926-3373(03)00217-0

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 [物理化学]; 081704 [应用化学];

摘要：

A new method for preparing vanadium oxide supported on carbon-ceramic cellular monoliths is described. This includes a support oxidation step with HNO3, followed by ionic exchange with a NaOH solution, equilibrium adsorption impregnation of VO2+ and thermal treatment. As a result an active catalyst for low-temperature selective catalytic reduction (SCR) reaction is obtained. The V-catalyst is more resistant to SO2 poisoning than the previously developed Mn-catalyst. Inhibition by water is reversible for both types of catalysts. Testing of the vanadium catalyst after subjecting it to the outlet gas stream of a power plant shows fast deactivation until constant residual activity is reached. Deactivation seems to be caused by arsenic poisoning and the formation of superficial sulphates. (C) 2003 Elsevier B.V. All rights reserved.

引用

页码：261 / 271

页数：11

共 35 条

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Reactivity of V2O5 catalysts for the selective catalytic reduction of NO by NH3: Influence of vanadia loading, H2O, and SO2 [J].