<?xml version="1.0" encoding="ISO-8859-1"?><article xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
<front>
<journal-meta>
<journal-id>1870-249X</journal-id>
<journal-title><![CDATA[Journal of the Mexican Chemical Society]]></journal-title>
<abbrev-journal-title><![CDATA[J. Mex. Chem. Soc]]></abbrev-journal-title>
<issn>1870-249X</issn>
<publisher>
<publisher-name><![CDATA[Sociedad Química de México A.C.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1870-249X2007000300006</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Mesoporous Silica-Lanthanum: Characterization and Catalytic Activity on NO Reduction]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Díaz-Jiménez]]></surname>
<given-names><![CDATA[Lourdes]]></given-names>
</name>
<xref ref-type="aff" rid="A01"/>
</contrib>
</contrib-group>
<aff id="A01">
<institution><![CDATA[,Instituto Politécnico Nacional Centro de Investigación y de Estudios Avanzados ]]></institution>
<addr-line><![CDATA[Saltillo Coahuila]]></addr-line>
<country>México</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>09</month>
<year>2007</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>09</month>
<year>2007</year>
</pub-date>
<volume>51</volume>
<numero>3</numero>
<fpage>154</fpage>
<lpage>159</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1870-249X2007000300006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1870-249X2007000300006&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1870-249X2007000300006&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[A series of ordered mesoporous silica-lanthanum materials was prepared. The influence of lanthanum into a silica matrix on the structural, textural and acidic properties is described. The mechanical and hydrothermal stability of mesoporous materials were evaluated. The catalytic activity of cobalt catalyst for selective reduction of nitrogen oxide -in the presence of propane- at temperatures between 350 and 550 °C, was tested. A selective reduction of NO by cobalt-based catalyst raised 18 %, at 450 °C.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[Se preparó una serie de materiales mesoporosos de sílice-lantano. Se describe la influencia de la adición de lantano en las propiedades textuales, estructurales y ácidas. También se evaluó la estabilidad térmica e hidrotermal de los materiales. Se probó la actividad catalítica de cobalto, sobre uno de los materiales preparados, en la reducción selectiva de monóxido de nitrógeno con propano a temperaturas entre 350 y 550 °C. Se alcanzó una conversión de 18 % de NO a 450 °C con el catalizador probado.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[SCR-NO]]></kwd>
<kwd lng="en"><![CDATA[Co catalyst]]></kwd>
<kwd lng="en"><![CDATA[mesoporous materials]]></kwd>
<kwd lng="es"><![CDATA[Reducción selectiva de NO]]></kwd>
<kwd lng="es"><![CDATA[catalizador de cobalto]]></kwd>
<kwd lng="es"><![CDATA[materiales mesoporosos]]></kwd>
</kwd-group>
</article-meta>
</front><body><![CDATA[  	    <p align="justify"><font face="verdana" size="4">Article</font></p>      <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="4"><b>Mesoporous Silica&#45;Lanthanum: Characterization and Catalytic Activity on NO Reduction</b></font></p>  	    <p align="center"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="center"><font face="verdana" size="2"><b>Lourdes D&iacute;az&#45;Jim&eacute;nez</b></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><i>Cinvestav&#45;Saltillo, km 13.5 carretera Saltillo&#45;Monterrey, 25900 Ramos Arizpe, Coahuila, M&eacute;xico. Tel: +52(844) 438&#45;9612 Fax: +52(844) 438&#45;9610</i> <a href="mailto:lourdes.diaz@cinvestav.edu.mx">lourdes.diaz@cinvestav.edu.mx</a></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2">Recibido el 1 de junio de 2007    ]]></body>
<body><![CDATA[<br> 	Aceptado el 26 de noviembre de 2007</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Abstract</b></font></p>  	    <p align="justify"><font face="verdana" size="2">A series of ordered mesoporous silica&#45;lanthanum materials was prepared. The influence of lanthanum into a silica matrix on the structural, textural and acidic properties is described. The mechanical and hydrothermal stability of mesoporous materials were evaluated. The catalytic activity of cobalt catalyst for selective reduction of nitrogen oxide &#45;in the presence of propane&#45; at temperatures between 350 and 550 &deg;C, was tested. A selective reduction of NO by cobalt&#45;based catalyst raised 18 %, at 450 &deg;C.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Key words:</b> SCR&#45;NO, Co catalyst, mesoporous materials.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Resumen</b></font></p>  	    <p align="justify"><font face="verdana" size="2">Se prepar&oacute; una serie de materiales mesoporosos de s&iacute;lice&#45;lantano. Se describe la influencia de la adici&oacute;n de lantano en las propiedades textuales, estructurales y &aacute;cidas. Tambi&eacute;n se evalu&oacute; la estabilidad t&eacute;rmica e hidrotermal de los materiales. Se prob&oacute; la actividad catal&iacute;tica de cobalto, sobre uno de los materiales preparados, en la reducci&oacute;n selectiva de mon&oacute;xido de nitr&oacute;geno con propano a temperaturas entre 350 y 550 &deg;C. Se alcanz&oacute; una conversi&oacute;n de 18 % de NO a 450 &deg;C con el catalizador probado.</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Palabras clave:</b> Reducci&oacute;n selectiva de NO, catalizador de cobalto, materiales mesoporosos.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    ]]></body>
<body><![CDATA[<p align="justify"><font face="verdana" size="2"><a href="/pdf/jmcs/v51n3/v51n3a6.pdf" target="_blank">DESCARGAR ART&Iacute;CULO EN FORMATO PDF</a></font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>Acknowledgements</b></font></p>  	    <p align="justify"><font face="verdana" size="2">The author acknowledges to Departamento de Qu&iacute;mica Inorg&aacute;nica, Cristalograf&iacute;a y Mineralog&iacute;a, of M&aacute;laga University (Spain) for the support on experimental. Also thanks to CONACYT for a fellowship number 93793.</font></p>  	    <p align="justify"><font face="verdana" size="2">&nbsp;</font></p>  	    <p align="justify"><font face="verdana" size="2"><b>References</b></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">1. Li, G.; Larsen, S.C.; Grassian; V.H. <i>J. Molec. Catal. A Chemical</i> <b>2005</b>,227(1), 25.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=4899016&pid=S1870-249X200700030000600001&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    <!-- ref --><p align="justify"><font face="verdana" size="2">2.&nbsp;Delahay, G.; Coq, B. <i>Catal. Sci. Ser.</i> <b>2002,</b> 3, 345.    &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;[&#160;<a href="javascript:void(0);" onclick="javascript: window.open('/scielo.php?script=sci_nlinks&ref=4899018&pid=S1870-249X200700030000600002&lng=','','width=640,height=500,resizable=yes,scrollbars=1,menubar=yes,');">Links</a>&#160;]<!-- end-ref --></font></p>  	    ]]></body>
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