<?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>2448-5691</journal-id>
<journal-title><![CDATA[Mundo nano. Revista interdisciplinaria en nanociencias y nanotecnología]]></journal-title>
<abbrev-journal-title><![CDATA[Mundo nano]]></abbrev-journal-title>
<issn>2448-5691</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Instituto de Ciencias Aplicadas y Tecnología]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S2448-56912021000100003</article-id>
<article-id pub-id-type="doi">10.22201/ceiich.24485691e.2021.26.69633</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Análisis y relevancia de los procesos catalíticos para la remoción de azufre en los combustibles fósiles]]></article-title>
<article-title xml:lang="en"><![CDATA[Analysis and relevance of catalytic processes to sulfur removal from fossil fuels]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Álvarez-Amparán]]></surname>
<given-names><![CDATA[Marco Antonio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Cedeño-Caero]]></surname>
<given-names><![CDATA[Luis]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad Nacional Autónoma de México Instituto de Ingeniería Coordinación de Ingeniería Ambiental]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Universidad Nacional Autónoma de México Facultad de Química Departamento de Ingeniería Química]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2021</year>
</pub-date>
<volume>14</volume>
<numero>26</numero>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S2448-56912021000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S2448-56912021000100003&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S2448-56912021000100003&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los procesos para remover el azufre (S) de combustibles fósiles han cobrado gran relevancia debido a las regulaciones gubernamentales en material ambiental a nivel mundial. En este trabajo, se analiza la presencia del S como elemento natural en el proceso de formación del petróleo. Se establecen los principales motivos por los cuales el S debe ser removido del petróleo. Se comenta el proceso de refinación del crudo de petróleo, así como una descripción del proceso convencional para desulfurar las fracciones de petróleo; se mencionan las tecnologías complementarias y/o alternativas para disminuir el contenido de S a niveles establecidos por las normas internacionales. Finalmente, se discute acerca de las expectativas a futuro en el uso de combustibles de origen fósil y no fósil.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Nowadays processes to remove pollutants such as sulfur (S) have become very important by the environmental regulations imposed. Therefore, the presence of S as natural component on the crude oil formation is commented in this work. The main reasons to remove S of the crude oil fractions were discussed. The refining process and conventional technology to remove S from the crude oil fractions were explained. Complementary or alternative technologies to remove S to reach international regulations were analyzed. Finally, future expectations about the use of fossil and non-fossil fuels were discussed.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[azufre]]></kwd>
<kwd lng="es"><![CDATA[combustibles fósiles]]></kwd>
<kwd lng="es"><![CDATA[desulfuración de combustibles]]></kwd>
<kwd lng="es"><![CDATA[tecnologías de desulfuración]]></kwd>
<kwd lng="en"><![CDATA[sulfur]]></kwd>
<kwd lng="en"><![CDATA[fossil fuels, desulfurization of fuels, desulfurization technologies]]></kwd>
</kwd-group>
</article-meta>
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