Acid-activated vermiculites and phlogophites as catalysts for the DeNOx process

被引：53

作者：

Chmielarz, Lucjan ^{[1
]}

Kowalczyk, Andrzej ^{[1
]}

Michalik, Marek ^{[2
]}

Dudek, Barbara ^{[1
]}

Piwowarska, Zofia ^{[1
]}

Matusiewicz, Adam ^{[3
]}

机构：

[1] Jagiellonian Univ, Fac Chem, PL-30060 Krakow, Poland

[2] Jagiellonian Univ, Inst Geol Sci, PL-30063 Krakow, Poland

[3] Inst Ceram & Bldg Mat, Glass & Bldg Mat Div, PL-31983 Krakow, Poland

来源：

APPLIED CLAY SCIENCE | 2010年 / 49卷 / 03期

关键词：

Vermiculite; Phlogopite; Acid-activation; DeNOx process; TRANSITION-METALS; CLAY-MINERALS; REDUCTION; NO; MONTMORILLONITE; AL; CO; NANOPARTICLES; DISSOLUTION; SCR;

D O I：

10.1016/j.clay.2010.04.020

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 ; 081704 ;

摘要：

Vermiculite and phlogopite were reacted with nitric acid under controlled conditions. The products were characterized by the composition (XRF), structure (XRD, FTIR, UV-vis-DRS), texture (BET); morphology (SEM) and surface acidity (NH3-TPD). Acid-activation increased the specific surface area and porosity and led to partial leaching of iron, aluminium and magnesium from the octahedral sheets. The acid-activated vermiculites and phlogopites were active and selective catalysts of the DeNOx process (4 NO+4 NH3 + O-2 = 4 N-2 + H2O). The best catalytic results were obtained for vermiculite activated with nitric acid (0.8 M) at 95 degrees C for 24 h. The modified phlogopites were less active. The best catalytic results were also obtained after reaction with HNO3 for 24 h. (C) 2010 Elsevier B.V. All rights reserved.

引用

页码：156 / 162

页数：7

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