<?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>0250-5460</journal-id>
<journal-title><![CDATA[Revista Boliviana de Química]]></journal-title>
<abbrev-journal-title><![CDATA[Rev. Bol. Quim]]></abbrev-journal-title>
<issn>0250-5460</issn>
<publisher>
<publisher-name><![CDATA[Universidad Mayor de San Andrés]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0250-54602025000100001</article-id>
<article-id pub-id-type="doi">10.53287/hpna5777hm27r</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Desarrollo de un método de regeneración de una zeolita empleada en procesos de adsorción por oscilación de presión (PSA) para concentrar oxígeno del aire]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Sanabria Choque]]></surname>
<given-names><![CDATA[Rilda Paulina]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Palabral Velarde]]></surname>
<given-names><![CDATA[Karen Ximena]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
<xref ref-type="aff" rid="Aaf"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lopez N.]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cárdenas Tapia]]></surname>
<given-names><![CDATA[Edgar Vladimir]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[García Mendoza]]></surname>
<given-names><![CDATA[Javier Gustavo]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,aff1  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<aff id="Af2">
<institution><![CDATA[,aff2  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>05</month>
<year>2025</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>05</month>
<year>2025</year>
</pub-date>
<volume>42</volume>
<numero>1</numero>
<fpage>1</fpage>
<lpage>15</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_arttext&amp;pid=S0250-54602025000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_abstract&amp;pid=S0250-54602025000100001&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.bo/scielo.php?script=sci_pdf&amp;pid=S0250-54602025000100001&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Se recolectó una muestra desechada de un adsorbente comercial (ZD) utilizado en procesos de concentración de oxígeno, para su regeneración mediante métodos de: i) desorción por oscilación de presión (PSA), ii) métodos combinados de aplicación de calor y desorción al vacío (TSA-VSA), iii) método de aplicación de calor con gas inerte por oscilación de temperatura y presión (TSA-PSA) y iv) se realizó un intercambio iónico de sodio (Na+) por litio (Li+) seguido de la regeneración del material utilizando el método TSA-PSA. La muestra fue caracterizada química y estructuralmente por DRX, SEM, EDS y BET. Los resultados indican que la muestra (ZD) es una zeolita X y que su estructura principal se mantiene intacta. El proceso de regeneración de la muestra alcanzó una eficiencia de hasta un 75% por el método iv) lo que sugiere que este material podría ser reutilizable en su aplicación.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Development of a regeneration method for a zeolite used in pressure swing adsorption (PSA) processes to concentrate oxygen from the air.A discarded sample of a commercial adsorbent (ZD) used in an oxygen concentration process was collected for its regeneration by the following methods: i) pressure swing desorption (PSA), ii) combining heat and vacuum desorption (TSA-VSA), iii) inert gas heat application by temperature and pressure swing (TSA-PSA) and iv) sodium (Na+) for lithium (Li+) ion exchange followed by regeneration of the material using the TSA-PSA. The sample was chemically and structurally characterized by the XRD, SEM, EDS, and BET techniques. The results indicate that the sample (ZD) is a zeolite X and that its main structure remains intact. The regeneration process of the sample reached an efficiency of up to 75% by the method iv) suggesting that this material could be reusable in its original application.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Adsorption]]></kwd>
<kwd lng="en"><![CDATA[Regeneration]]></kwd>
<kwd lng="en"><![CDATA[Zeolite]]></kwd>
<kwd lng="en"><![CDATA[PSA Process]]></kwd>
<kwd lng="es"><![CDATA[Adsorción]]></kwd>
<kwd lng="es"><![CDATA[Regeneración]]></kwd>
<kwd lng="es"><![CDATA[Zeolita]]></kwd>
<kwd lng="es"><![CDATA[Proceso PSA]]></kwd>
</kwd-group>
</article-meta>
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