Characterization of (Sn and Cu)/Pd catalysts for the nitrate reduction in natural water

被引：34
作者：
Franch, Cristina [2 ]
Rodriguez-Castellon, Enrique [1 ]
Reyes-Carmona, Alvaro [1 ]
Palomares, Antonio E. [2 ]
机构：
[1] Univ Malaga, Fac Ciencias, Dept Quim Inorgan Cristalog & Mineral, Unidad Asociada ICP CSIC, E-29071 Malaga, Spain
[2] Univ Politecn Valencia, Inst Tecnol Quim UPV CSIC, Consejo Nacl Invest Cient, Valencia 46022, Spain
来源：
APPLIED CATALYSIS A-GENERAL | 2012年 / 425卷
关键词：
Nitrate catalytic reduction; Natural water; Continuous process; Sn-Pd; Cu-Pd; XPS; PD-SN CATALYST; DRINKING-WATER; BIMETALLIC CATALYSTS; ACTIVATED CARBON; HYDROGENATION; REMOVAL; CU; PALLADIUM; COPPER; DENITRIFICATION;
D O I：
10.1016/j.apcata.2012.03.015
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：
The aim of this work is to characterize different (Cu and Sn)/Pd catalysts, supported on alumina, used for the catalytic removal of nitrates in natural water. The catalysts have been prepared with a Pd/(Cu or Sn) ratio of 2 but with different metal contents. Their activity and selectivity have been studied using a continuous stirred-tank reactor with nitrate polluted water from an aquifer. The catalysts have been characterized both before and after reaction by XPS, XRD, XRF, adsorption-desorption N-2 isotherms at 196 degrees C and TEM. XPS results show changes of the Pd/Sn surface atomic ratio upon catalyst activation and after reaction and the coexistence of different oxidation states for the active metals. The studied catalysts are active, being the catalyst with the best performance that with the highest metallic dispersion and with the lowest phases segregation. The characterization of the catalysts after reaction shows that catalyst deactivation could be related with the non-reversible oxidation of the Sn-Pd couple. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：145 / 152
页数：8
相关论文
共 38 条
[1]  
Anderson J.R., 1975, Structure of metallic catalysts
[2]   Catalytic reduction of nitrate on Pt-Cu and Pd-Cu on active carbon using continuous reactor -: The effect of copper nanoparticles [J].
Barrabés, N ;
Just, J ;
Dafinov, A ;
Medina, F ;
Fierro, JLG ;
Sueiras, JE ;
Salagre, P ;
Cesteros, Y .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2006, 62 (1-2) :77-85
[3]   Pt-MgZnCuAl hydrotalcite-derived catalysts in the reduction of nitrates using continuous and batch reactors [J].
Barrabes, N. ;
Garrido, M. A. ;
Frare, A. ;
Monzon, A. ;
Tichit, D. .
CATALYSIS TODAY, 2011, 175 (01) :328-337
[4]   Catalytic reduction of nitrates using Pt/CeO2 catalysts in a continuous reactor [J].
Barrabes, N. ;
Dafinov, A. ;
Medina, F. ;
Sueiras, J. E. .
CATALYSIS TODAY, 2010, 149 (3-4) :341-347
[5]   Catalytic nitrate removal from water, past, present and future perspectives [J].
Barrabes, Noelia ;
Sa, Jacinto .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2011, 104 (1-2) :1-5
[6]   Characterization of supported Pd-Cu bimetallic catalysts by SEM, EDXS, AES and catalytic selectivity measurements [J].
Batista, J ;
Pintar, A ;
Ceh, M .
CATALYSIS LETTERS, 1997, 43 (1-2) :79-84
[7]   Tin promoted palladium catalysts for nitrate removal from drinking water [J].
Berndt, H ;
Mönnich, I ;
Lücke, B ;
Menzel, M .
APPLIED CATALYSIS B-ENVIRONMENTAL, 2001, 30 (1-2) :111-122
[8]  
Boskovic G., 2008, APTEFF, V39, P93
[9]   Influence of textural properties of activated carbons on Pd/carbon catalysts synthesis for cinnamaldehyde hydrogenation [J].
Cabiac, Amandine ;
Cacciaguerra, Thomas ;
Trens, Philippe ;
Durand, Robert ;
Delahay, Gerard ;
Medevielle, Alice ;
Plee, Dominique ;
Coq, Bernard .
APPLIED CATALYSIS A-GENERAL, 2008, 340 (02) :229-235
[10]   An electrochemical and XPS study of the electrodeposited binary Pd-Sn catalyst: The electroreduction of nitrate ions in acid medium [J].
Casella, IG ;
Contursi, M .
JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 2006, 588 (01) :147-154
1234