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Evaluación del pretratamiento con ácido sulfúrico diluido del pasto maralfalfa (Pennisetum glaucum x Pennisetum purpureum) para la producción de etanol
Authors
José de Jesús Díaz
Lady Mateus
Mario Velásquez
Orlando Hernández
Publication date
1 January 2012
Publisher
Universidad Nacional de Colombia
Abstract
<!--[if gte mso 9]><xml> <w:WordDocument> <w:View>Normal</w:View> <w:Zoom>0</w:Zoom> <w:TrackMoves /> <w:TrackFormatting /> <w:HyphenationZone>21</w:HyphenationZone> <w:PunctuationKerning /> <w:ValidateAgainstSchemas /> <w:SaveIfXMLInvalid>false</w:SaveIfXMLInvalid> <w:IgnoreMixedContent>false</w:IgnoreMixedContent> <w:AlwaysShowPlaceholderText>false</w:AlwaysShowPlaceholderText> <w:DoNotPromoteQF /> <w:LidThemeOther>ES-CO</w:LidThemeOther> <w:LidThemeAsian>X-NONE</w:LidThemeAsian> <w:LidThemeComplexScript>X-NONE</w:LidThemeComplexScript> <w:Compatibility> <w:BreakWrappedTables /> <w:SnapToGridInCell /> <w:WrapTextWithPunct /> <w:UseAsianBreakRules /> <w:DontGrowAutofit /> <w:SplitPgBreakAndParaMark /> <w:DontVertAlignCellWithSp /> <w:DontBreakConstrainedForcedTables /> <w:DontVertAlignInTxbx /> <w:Word11KerningPairs /> <w:CachedColBalance /> </w:Compatibility> <w:BrowserLevel>MicrosoftInternetExplorer4</w:BrowserLevel> <m:mathPr> <m:mathFont m:val="Cambria Math" /> <m:brkBin m:val="before" /> <m:brkBinSub m:val=" " /> <m:smallFrac m:val="off" /> <m:dispDef /> <m:lMargin m:val="0" /> <m:rMargin m:val="0" /> <m:defJc m:val="centerGroup" /> <m:wrapIndent m:val="1440" /> <m:intLim m:val="subSup" /> <m:naryLim m:val="undOvr" /> </m:mathPr></w:WordDocument> </xml><![endif]--> <p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal;"><strong><span style="font-size: 10.0pt; font-family: " lang="EN-US">Título en ingles: Dilute sulfuric acid pretreatment of goliath grass </span></strong><strong style="mso-bidi-font-weight: normal;"><span style="font-size: 10.0pt; font-family: " lang="EN-US">(<em style="mso-bidi-font-style: normal;">Pennisetum <span style="mso-bidi-font-style: italic;">glaucum</span> x Pennisetum<span style="mso-bidi-font-style: italic;"> purpureum</span>) </em><span style="mso-bidi-font-weight: bold; mso-bidi-font-style: italic;">for ethanol cellulosic</span></span></strong></p> <p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal;"><strong style="mso-bidi-font-weight: normal;"><span style="font-size: 10.0pt; font-family: " lang="ES-TRAD">Resumen : </span></strong><span style="font-size: 10.0pt; font-family: " lang="ES">Evaluar la producción de etanol a partir de cultivos lignocelulósicos, específicamente pastos de rápido crecimiento en la región, constituye una alternativa a la demanda de biocombustibles. En la presente investigación se seleccionó el pasto Maralfalfa (</span><em style="mso-bidi-font-style: normal;"><span style="font-size: 10.0pt; font-family: ">Pennisetum<span style="mso-spacerun: yes;"> </span><span style="mso-bidi-font-style: italic;">glaucum</span> x Pennisetum<span style="mso-bidi-font-style: italic;"><span style="mso-spacerun: yes;"> </span>purpureum</span></span></em><span style="font-size: 10.0pt; font-family: ">) utilizando el pretratamiento con ácido sulfúrico diluido a diferentes temperaturas (110, 130, 150, 170 y 190 °C) y concentraciones de ácido (0.8, 1.2 y 2.0% (p/p)), seguido de un proceso de hidrólisis enzimática utilizando celulasas y celobiosas comerciales y un proceso de hidrólisis y fermentación simultanea. La máxima producción de etanol obtenido fue 117 mg etanol/ g biomasa pretratada a </span><span style="font-size: 10.0pt; font-family: " lang="ES">190 °C y 1,2 %(p/p) de ácido sulfúrico. El líquido hidrolizado fue caracterizado calculando el porcentaje de glucosa, xilosa y lignina solubilizadas y degradadas durante el pretratamiento.</span><strong style="mso-bidi-font-weight: normal;"></strong></p> <p class="MsoNormal" style="margin-bottom: .0001pt; line-height: normal;"><strong><span style="font-size: 10.0pt; font-family: " lang="ES">Palabras clave</span></strong><span style="font-size: 10.0pt; font-family: " lang="ES">: etanol lignocelulósico; celulosa; hemicelulosa.</span></p> <p class="TAMainText" style="text-indent: 0cm; line-height: normal;"><strong style="mso-bidi-font-weight: normal;"><span style="font-size: 10.0pt; font-family: " lang="EN-US">Abstract: </span></strong><span style="font-size: 10.0pt; font-family: " lang="EN-US">The goliath grass (<em style="mso-bidi-font-style: normal;">Pennisetum<span style="mso-spacerun: yes;"> </span><span style="mso-bidi-font-style: italic;">glaucum</span> x Pennisetum<span style="mso-bidi-font-style: italic;"><span style="mso-spacerun: yes;"> </span>purpureum</span></em><span style="mso-bidi-font-style: italic;">) was pretreated with</span> different sulfuric acid concentrations <span style="mso-bidi-font-style: italic;">(0.8, 1.2 y 2.0% (w/w)) from low to high temperatures (110, 130, 150, 170 y 190 °C) followed by enzymatic hydrolysis and SSF of remaining solids. The maximum yield was 117 mg of ethanol/g biomass to 190 °C and 1.2 % (w/w) of sulfuric acid.</span></span></p> <p class="TAMainText" style="text-indent: 0cm; line-height: normal;"><strong style="mso-bidi-font-weight: normal;"><span style="font-size: 10.0pt; font-family: " lang="EN-US">Key words:</span></strong><span style="font-size: 10.0pt; font-family: " lang="EN-US"> lignocellulosic ethanol; hemicelluloses; cellulose.</span></p
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