<?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>S0122-53832018000100121</article-id>
<article-id pub-id-type="doi">10.29047/01225383.99</article-id>
<title-group>
<article-title xml:lang="en"><![CDATA[Process optimization for biodiesel production from neutralized waste cooking oil and the effect of this biodiesel on engine performance]]></article-title>
<article-title xml:lang="es"><![CDATA[Optimización del proceso de producción de biodiesel a partir de aceite de cocina usado neutralizado y evaluación de su desempeño en un motor]]></article-title>
</title-group>
<contrib-group>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Tanzer]]></surname>
<given-names><![CDATA[Eryilmaz,]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Fatih]]></surname>
<given-names><![CDATA[Aksoy,]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Lacine]]></surname>
<given-names><![CDATA[Aksoy,]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Faruk-Emre]]></surname>
<given-names><![CDATA[Bayrakceken, Huseyin Aysal,]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Seda]]></surname>
<given-names><![CDATA[Sahin,]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
<contrib contrib-type="author">
<name>
<surname><![CDATA[Murat-Kadir]]></surname>
<given-names><![CDATA[Yesilyurt,]]></given-names>
</name>
<xref ref-type="aff" rid="Aff"/>
</contrib>
</contrib-group>
<aff id="Af1">
<institution><![CDATA[,Bozok University Department of Biosystems Engineering ]]></institution>
<addr-line><![CDATA[Yozgat ]]></addr-line>
<country>Turkey</country>
</aff>
<aff id="Af2">
<institution><![CDATA[,Afyon Kocatepe University Department of Automotive Engineering ]]></institution>
<addr-line><![CDATA[Afyonkarahisar ]]></addr-line>
<country>Turkey</country>
</aff>
<aff id="Af3">
<institution><![CDATA[,Afyon Kocatepe University Department of Chemical ]]></institution>
<addr-line><![CDATA[Afyonkarahisar ]]></addr-line>
<country>Turkey</country>
</aff>
<aff id="Af4">
<institution><![CDATA[,Selcuk University Department of Agricultural Machinery ]]></institution>
<addr-line><![CDATA[Konya ]]></addr-line>
<country>Turkey</country>
</aff>
<aff id="Af5">
<institution><![CDATA[,Bozok University Department of Mechanical Engineering ]]></institution>
<addr-line><![CDATA[Yozgat ]]></addr-line>
<country>Turkey</country>
</aff>
<pub-date pub-type="pub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<pub-date pub-type="epub">
<day>00</day>
<month>06</month>
<year>2018</year>
</pub-date>
<volume>8</volume>
<numero>1</numero>
<fpage>121</fpage>
<lpage>127</lpage>
<copyright-statement/>
<copyright-year/>
<self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_arttext&amp;pid=S0122-53832018000100121&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_abstract&amp;pid=S0122-53832018000100121&amp;lng=en&amp;nrm=iso"></self-uri><self-uri xlink:href="http://www.scielo.org.co/scielo.php?script=sci_pdf&amp;pid=S0122-53832018000100121&amp;lng=en&amp;nrm=iso"></self-uri><abstract abstract-type="short" xml:lang="en"><p><![CDATA[ABSTRACT In this study, the methyl ester production process from neutralized waste cooking oils is optimized by using alkali-catalyzed (KOH) single-phase reaction. The optimization process is performed depending on the parameters, such as catalyst concentration, methanol/oil ratio, reaction temperature and reaction time. The optimum methyl ester conversion efficiency was 90.1% at the optimum conditions of 0.7 wt% of potassium hydroxide, 25 wt% methanol/oil ratio, 90 min reaction time and 60°C reaction temperature. After the fuel characteristics of the methyl ester obtained under optimum conditions were determined, the effect on engine performance, CO and NOx emissions of methyl ester was investigated in a diesel engine with a single cylinder and direct injection. When compared to diesel fuel, engine power and torque decreased when using methyl ester, and specific fuel consumption increased. NOx emission increases at a rate of 18.4% on average through use of methyl ester.]]></p></abstract>
<abstract abstract-type="short" xml:lang="es"><p><![CDATA[RESUMEN Este estudio analiza el proceso de producción de metil éster a partir de aceites de cocina usados y neutralizados mediante una reacción alcalí-catalizada (KOH) de fase única. El proceso de optimización se lleva a cabo tomando en cuenta parámetros tales como: La concentración del catalizador, la relación metanol/aceite, la temperatura de reacción y el tiempo de reacción. La eficiencia óptima de conversión del metil éster fue de 90,1% bajo condiciones óptimas de 0,7 wt% de hidróxido de potasio, 25 wt% de relación metanol/aceite, tiempo de reacción de 90 minutos y temperatura de reacción de 60°C. Después de determinar las características como combustible del metil éster obtenido bajo condiciones óptimas, se sometió a investigación su efecto sobre el desempeño del motor y de las emisiones de CO y NOx del metil éster utilizando un motor diesel de un sólo cilindro y de inyección directa. Cuando se compararon los resultados con el combustible diesel, se observó que la potencia y el torque del motor disminuyeron utilizando metil éster, mientras que el consumo de combustible específico aumentó. La emisión de NOx aumenta a una tasa de 18,4% en promedio cuando se utiliza el metil éster.]]></p></abstract>
<kwd-group>
<kwd lng="en"><![CDATA[Neutralized Waste Cooking Oil]]></kwd>
<kwd lng="en"><![CDATA[Methyl ester]]></kwd>
<kwd lng="en"><![CDATA[Optimization]]></kwd>
<kwd lng="en"><![CDATA[Engine Performance]]></kwd>
<kwd lng="en"><![CDATA[Emission]]></kwd>
<kwd lng="es"><![CDATA[Aceite de Cocina Usado Neutralizado]]></kwd>
<kwd lng="es"><![CDATA[Metil éster]]></kwd>
<kwd lng="es"><![CDATA[Optimización]]></kwd>
<kwd lng="es"><![CDATA[Desempeño del motor]]></kwd>
<kwd lng="es"><![CDATA[Emisión]]></kwd>
</kwd-group>
</article-meta>
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