<?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>1405-888X</journal-id>
<journal-title><![CDATA[TIP. Revista especializada en ciencias químico-biológicas]]></journal-title>
<abbrev-journal-title><![CDATA[TIP]]></abbrev-journal-title>
<issn>1405-888X</issn>
<publisher>
<publisher-name><![CDATA[Universidad Nacional Autónoma de México, Facultad de Estudios Superiores Zaragoza]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S1405-888X2022000100311</article-id>
<article-id pub-id-type="doi">10.22201/fesz.23958723e.2022.481</article-id>
<title-group>
<article-title xml:lang="es"><![CDATA[Condiciones del proceso de transesterificación en la producción de biodiésel y sus distintos mecanismos de reacción]]></article-title>
<article-title xml:lang="en"><![CDATA[Conditions of the transesterification process in the production of biodiesel and its different reaction mechanisms]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Pérez-Bravo]]></surname>
<given-names><![CDATA[Sheila Genoveva]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Aguilera-Vázquez]]></surname>
<given-names><![CDATA[Luciano]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Castañeda-Chávez]]></surname>
<given-names><![CDATA[María del Refugio]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Gallardo-Rivas]]></surname>
<given-names><![CDATA[Nohra Violeta]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Instituto Tecnológico de Ciudad Madero División de Estudios de Posgrado e Investigación ]]></institution>
<addr-line><![CDATA[ Tamaulipas]]></addr-line>
<country>Mexico</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Instituto Tecnológico de Boca del Rio Depto. de Posgrado e Investigación ]]></institution>
<addr-line><![CDATA[ Veracruz]]></addr-line>
<country>Mexico</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>00</month>
<year>2022</year>
</pub-date>
<volume>25</volume>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_arttext&amp;pid=S1405-888X2022000100311&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_abstract&amp;pid=S1405-888X2022000100311&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.mx/scielo.php?script=sci_pdf&amp;pid=S1405-888X2022000100311&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="es"><p><![CDATA[Resumen Los biocombustibles son una alternativa viable a la sustitución parcial o total de los combustibles fósiles, por consiguiente, el biodiésel es una opción para suplir al diésel, ya que puede utilizarse sin modificar los motores existentes y ofrecer un proceso de distribución seguro. En esta revisión, se resumen las materias primas utilizadas en los últimos años para su producción mediante el método de la transesterificación, así como el efecto que las condiciones de operación tienen en el rendimiento y mecanismos de reacción y que se presentan al utilizar las catálisis básica, ácida y heterogénea con el catalizador CaO. La transesterificación se ha estudiado y modificado, desde el proceso convencional hasta la aplicación del ultrasonido, en condiciones supercríticas e in situ. El proceso idóneo dependerá de las materias primas y los equipos disponibles, utilizando la menor cantidad de energía, tiempo e insumos, uno de los más prometedores es la transesterificación con ultrasonido y un catalizador heterogéneo.]]></p></abstract>
<abstract abstract-type="short" xml:lang="en"><p><![CDATA[Abstract Biofuels are a viable alternative to the partial or total replacement of fossil fuels, biodiesel is an ideal substitute for diesel as it can be used without modifying existing engines and offers a safe distribution process. In this review, the raw materials used in recent years for their production by the transesterification method are summarized, as well as the effect that the operating conditions have on the reaction yield, in addition to integrating the reaction mechanisms with base catalysis, acid and the heterogeneous catalyst CaO. Transesterification has been studied and modified, from the conventional process to the application of ultrasound, in supercritical conditions and in situ. The ideal process will depend on the available raw materials and equipment, using the least amount of energy, time and inputs, one of the most promising is transesterification with ultrasound and heterogeneous catalyst.]]></p></abstract>
<kwd-group>
<kwd lng="es"><![CDATA[biodiésel]]></kwd>
<kwd lng="es"><![CDATA[transesterificación]]></kwd>
<kwd lng="es"><![CDATA[catálisis]]></kwd>
<kwd lng="es"><![CDATA[condiciones de operación]]></kwd>
<kwd lng="es"><![CDATA[mecanismos de reacción]]></kwd>
<kwd lng="en"><![CDATA[biodiesel]]></kwd>
<kwd lng="en"><![CDATA[transesterification]]></kwd>
<kwd lng="en"><![CDATA[catalysis]]></kwd>
<kwd lng="en"><![CDATA[operating conditions]]></kwd>
<kwd lng="en"><![CDATA[reaction mechanisms]]></kwd>
</kwd-group>
</article-meta>
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