Catalytic activity and characterization of Pt/calcined CuZnAl hydrotalcites in nitrate reduction reaction in water

被引：18

作者：

Aristizabal, A. ^{[1
]}

Kolafa, M. ^{[1
]}

Contreras, S. ^{[1
]}

Dominguez, M. ^{[3
,4
]}

Llorca, J. ^{[3
,4
]}

Barrabes, N. ^{[2
]}

Tichit, D. ^{[2
]}

Medina, F. ^{[1
]}

机构：

[1] Univ Rovira & Virgili, Dept Engn Quim, Tarragona 43007, Spain

[2] Inst Charles Gerhardt, UMR 5253, CNRS, ENSCM UM1 UM2, F-34296 Montpellier 5, France

[3] Univ Politecn Cataluna, Inst Tecn Energet, E-08028 Barcelona, Spain

[4] Univ Politecn Cataluna, Ctr Res NanoEngn, E-08028 Barcelona, Spain

来源：

CATALYSIS TODAY | 2011年 / 175卷 / 01期

关键词：

Nitrate removal; Catalytic reduction; Cu-Pt; Hydrotalcites; CuZnAl; PD-CU CATALYST; DRINKING-WATER; CU/ZNO/AL2O3; CATALYSTS; BIMETALLIC CATALYST; PHASE REDUCTION; MIXED OXIDES; REMOVAL; HYDROGENATION; GROUNDWATER; METHANOL;

D O I：

10.1016/j.cattod.2011.02.044

中图分类号：

O69 [应用化学];

学科分类号：

081704 ;

摘要：

Groundwater pollution with high nitrate concentration has become an important environmental and health issue. Catalytic reduction of nitrates emerged as a promising technique to remove nitrate in water. In the present study, Pt supported on CuZnAl calcined hydrotalcite catalysts with different Cu/Zn ratios (0.5, 1 and 2) were tested in a continuous reactor for the catalytic reduction of nitrates. These materials were characterized by different techniques such as: BET, TPR, XRD, HRTEM, XPS, FTIR. According to the results, the Cu/Zn atomic ratio in the active support has a strong influence in the nitrate conversion and in the nitrogen selectivity, indicating that the interaction of copper in the support plays an important role. The highest nitrogen yield is achieved with a Cu/Zn ratio 1. Also, the incidence of the Pt metal loading was studied in the range of 0.5-2%. This variable does not present a significant influence in the catalytic activity compared to the Cu/Zn ratio, within the range studied. Furthermore, catalysts are stable for this reaction. (C) 2011 Elsevier B.V. All rights reserved.

引用

页码：370 / 379

页数：10

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