<?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>0122-5383</journal-id>
<journal-title><![CDATA[CT&F - Ciencia, Tecnología y Futuro]]></journal-title>
<abbrev-journal-title><![CDATA[C.T.F Cienc. Tecnol. Futuro]]></abbrev-journal-title>
<issn>0122-5383</issn>
<publisher>
<publisher-name><![CDATA[Instituto Colombiano del Petróleo (ICP) - ECOPETROL S.A.]]></publisher-name>
</publisher>
</journal-meta>
<article-meta>
<article-id>S0122-53832021000200039</article-id>
<article-id pub-id-type="doi">10.29047/01225383.374</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[THEORETICAL AND NUMERICAL STUDY OF THE COMBUSTION PROPERTIES OF PREMIXED HYDROGEN / NATURAL GAS / AIR AT A SUBATMOSPHERIC PRESSURE OF 0.849 BAR]]></article-title>
<article-title xml:lang="es"><![CDATA[ESTUDIO TEÓRICO Y NUMÉRICO DE LAS PROPIEDADES DE COMBUSTIÓN DEL HIDRÓGENO / GAS NATURAL / AIRE PREMEZCLADO A UNA PRESIÓN SUBATMOSFÉRICA DE 0.849 BAR]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Maya]]></surname>
<given-names><![CDATA[Luisa]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Restrepo]]></surname>
<given-names><![CDATA[Alejandro]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Amell]]></surname>
<given-names><![CDATA[Andrés A.]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Universidad de Antioquia  ]]></institution>
<addr-line><![CDATA[ ]]></addr-line>
<country>Colombia</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>12</month>
<year>2021</year>
</pub-date>
<volume>11</volume>
<numero>2</numero>
<fpage>39</fpage>
<lpage>49</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0122-53832021000200039&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0122-53832021000200039&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0122-53832021000200039&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT Due to the energy transition worldwide, renewable energy sources complementary to fossil fuels are being sought. Considering that hydrogen generates only water when reacting with air, the application of hydrogen can play a leading and complementary role in the reduction of greenhouse gas (GHG) emissions. This work conducts a theoretical and numerical evaluation of the effect of adding hydrogen to natural gas (NG) combustion. Eight fuels, from 0% H2 up to 100% H2, by volume, were evaluated in 15% intervals. The volumetric and mass air requirement, H2O and CO2 production, wet and dry combustion products, as added to the heating value, Wobbe index, flammability ranges, dew point, and specific gravity, were calculated for each mixture at stoichiometric conditions. Some premixed flame combustion properties were calculated numerically for equivalence ratios from 0.5 to 1.5, using Medellín's atmospheric conditions. These properties include the minimum ignition energy, critical quenching distance, diffusive thickness, laminar burning velocity, adiabatic flame temperature, flame structure, and ignition delay time. The latter property considered reagent preheat temperatures between 1000 K and 1600 K, finding an inverse relationship. Furthermore, increased hydrogen content showed an increase in flame temperature and laminar deflagration velocity, and a decrease in ignition delay time, flame thickness, critical quenching distance, and minimum ignition energy. Finally, the maximums and minimums of the properties considered were found to center at stoichiometric conditions for 100% natural gas, while the addition of hydrogen shifted the trend towards richer mixtures.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Debido a la transición energética que se ha venido presentando a nivel mundial, se han buscado complementariedades a los combustibles fósiles con energías de fuentes renovables, teniendo en cuenta que el hidrógeno es un combustible que puede generar sólo agua como producto de la reacción con el aire, se deben evaluar los diferentes escenarios en los que el hidrógeno puede tener un papel tanto protagónico como complementario en cuanto a disminución de gases de efecto invernadero (GEI). En este trabajo se realiza un análisis teórico y numérico que evalúa el cambio en las propiedades de combustión con la adición de hidrógeno al gas natural (GN). Ocho mezclas fueron evaluadas desde 0% H2 con incrementos de 15% (en volumen) hasta 100% H2. Para dichas mezclas, se calculó a condiciones estequiométricas el requerimiento de aire (volumétrico y másico), producción de H2O y CO2 (volumétrico y másico), humos húmedos y humos secos (volumétrico y másico), poder calorífico, índice de Wobbe, gravedad específica, intervalos de inflamabilidad, punto de rocío y gravedad específica. También, se calcularon de manera numérica algunas propiedades de combustión en llamas de premezcla, bajo un rango de relaciones de equivalencia entre 0.5 y 1.5 para las condiciones atmosféricas de la ciudad de Medellín; estas propiedades corresponden a la energía mínima de ignición, distancia crítica de enfriamiento, espesor difusivo, velocidad de deflagración laminar, temperatura de llama adiabática, estructura de llama y tiempo de retraso a la ignición, para esta última propiedad se consideraron temperaturas de precalentamiento de los reactivos entre 1000 K y 1600 K y encontró una tendencia inversa respecto a esta variable. Los resultados mostraron un aumento en la temperatura de llama y velocidad de deflagración laminar conforme se aumenta el contenido de hidrógeno en la mezcla, y del mismo modo se evidenció una disminución en el tiempo de retraso a la ignición, espesor de llama, diámetro crítico de enfriamiento y energía mínima de ignición. Asimismo, se encontró que el valor máximo/mínimo de las diferentes propiedades se encuentra para condiciones estequiométricas para 100% gas natural, y conforme se adiciona hidrógeno en la mezcla hay un desplazamiento a mezclas ricas.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Combustion properties]]></kwd>
<kwd lng="en"><![CDATA[Natural gas-hydrogen mixtures]]></kwd>
<kwd lng="es"><![CDATA[Propiedades de combustión]]></kwd>
<kwd lng="es"><![CDATA[Mezclas hidrógeno-gas natural]]></kwd>
</kwd-group>
</article-meta>
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</ref>
</ref-list>
</back>
</article>
