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  <leader>04489nab a2200277 i 4500</leader>
  <controlfield tag="003">BR-BrBNA</controlfield>
  <controlfield tag="005">20250604124923.0</controlfield>
  <controlfield tag="008">250604b2019    bl.ar|mooa||| 00| 0 por |</controlfield>
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    <subfield code="b">por</subfield>
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    <subfield code="b">0312</subfield>
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    <subfield code="a">Santos, Orildo Ribeiro dos </subfield>
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    <subfield code="a">Corr&#xEA;a, Nadia Cristina Fernandes </subfield>
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    <subfield code="a">Fran&#xE7;a, Luiz Ferreira de </subfield>
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  <datafield tag="245" ind1=" " ind2=" ">
    <subfield code="a">Processo de transforma&#xE7;&#xE3;o termoqu&#xED;mica da torta do mesocarpo do dend&#xEA; para obten&#xE7;&#xE3;o de biocombust&#xED;veis</subfield>
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Publica&#xE7;&#xE3;o online; 24 ref.; 5 illus.; 3 tables; Summaries (En, Pt)</subfield>
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RESUMO:    A cadeia produtiva do dend&#xEA; vem se expandindo rapidamente na regi&#xE3;o norte do Brasil, resultando em uma grande produ&#xE7;&#xE3;o de res&#xED;duos s&#xF3;lidos e l&#xED;quidos. A utiliza&#xE7;&#xE3;o desses res&#xED;duos como mat&#xE9;ria-prima para a produ&#xE7;&#xE3;o de biocombust&#xED;veis via processamento t&#xE9;rmico &#xE9; uma alternativa vi&#xE1;vel para reduzir o impacto ambiental e valorizar a cadeia produtiva do dend&#xEA;. Entre estes res&#xED;duos est&#xE1; a torta do mesocarpo do dend&#xEA; (TMD), que representa cerca de 25% do fruto. O objetivo deste estudo foi investigar o efeito da temperatura sobre as caracter&#xED;sticas dos produtos obtidos atrav&#xE9;s da transforma&#xE7;&#xE3;o termoqu&#xED;mica da TMD. Os experimentos foram realizados em temperaturas entre 150 e 550&#xB0;C, usando um reator cil&#xED;ndrico de a&#xE7;o inox de 7,5 cm de di&#xE2;metro e 10 cm de altura, com capacidade volum&#xE9;trica de 440 cm&#xB3;, aquecido com resist&#xEA;ncia el&#xE9;trica de 1,5 kW. As an&#xE1;lises mostraram que a TMD &#xE9; um material lignocelul&#xF3;sico com 45% de celulose, 21% de hemicelulose e 34% de lignina, tendo 22,5 MJ/kg de poder calor&#xED;fico. Os resultados mostraram que os rendimentos de l&#xED;quido e g&#xE1;s aumentam com o aumento da temperatura, enquanto o produto s&#xF3;lido diminui. Os  produtos  l&#xED;quidos  apresentaram  uma  similaridade  na  composi&#xE7;&#xE3;o  para  as  diferentes  temperaturas de processamento, por&#xE9;m os produtos s&#xF3;lidos tiveram aumento significativo no teor de carbono fixo com a temperatura. Nos produtos s&#xF3;lidos, a maior taxa de degrada&#xE7;&#xE3;o de celulose e hemicelulose ocorreu em temperaturas acima de 250&#xB0;C, com preval&#xEA;ncia de lignina nos produtos obtidos a temperaturas mais altas. 


PALAVRAS-CHAVE:   Craqueamento t&#xE9;rmico, Material lignocelul&#xF3;sico, Biomassa, &#xD3;leo de palma</subfield>
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ABSTRACT:    The palm oil production chain has been expanding rapidly in the northern region of Brazil, leading a large production of solid and liquid wastes. The use of these residues as raw material for the production of biofuels via thermal processing is a viable alternative to reduce the environmental impact and valorize the palm oil production chain. Among these residues is the oil palm mesocarp cake (OPMC), which represents about 25% w/w of the fruit. The objective of this study was to investigate the effect of temperature on the characteristics of the products obtained through the thermochemical transformation of OPMC. The experiments have been carried out at temperatures between 150 and 550&#xB0;C, using  a  cylindrical  reactor  of  stainless  steel  of  7.5  cm  in  diameter  and  10  cm  in  height,  with volumetric capacity of 440 cm&#xB3;, heated with electric resistance of 1.5 kW. The analyzes showed that OPMC is a lignocellulosic material with 45% cellulose, 21% hemicellulose and  34%  lignin,  having  heating  value  22.5  MJ/kg.  The  results  showed  that  the  yields  of  liquid  and  gas  increase  with  increasing  temperature  while  the  solid  product  decreases.  The liquid products presented a similarity in the composition for the different processing temperatures, however the solids had a significant increase in the fixed carbon content with the temperature. In solid products, the highest degradation rate of cellulose and hemicellulose occurred at temperatures above 250&#xB0;C, with the prevalence of lignin in products obtained at higher temperatures.



KEYWORDS:   Thermal cracking, Lignocellulosic material, Biomass, Palm oil</subfield>
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  <datafield tag="650" ind1=" " ind2=" ">
    <subfield code="a">DEND&#xCA;</subfield>
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  <datafield tag="650" ind1=" " ind2=" ">
    <subfield code="a">RES&#xCD;DUO AGROINDUSTRIAL</subfield>
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  <datafield tag="650" ind1=" " ind2=" ">
    <subfield code="a">BIOMASSA</subfield>
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  <datafield tag="650" ind1=" " ind2=" ">
    <subfield code="a">BIOCOMBUST&#xCD;VEL</subfield>
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  <datafield tag="773" ind1="0" ind2=" ">
    <subfield code="0">3551</subfield>
    <subfield code="9">345997</subfield>
    <subfield code="d">Bel&#xE9;m-PA Faculdade de Ci&#xEA;ncias Agr&#xE1;rias do Par&#xE1; 1999</subfield>
    <subfield code="o">2024-6646</subfield>
    <subfield code="t">Revista de Ci&#xEA;ncias Agr&#xE1;rias (Brazil)</subfield>
    <subfield code="x">1517-591X Impresso/Vers&#xE3;o online ISSN 2177-8760</subfield>
    <subfield code="g">v, 62 p. 1-7; (2019)</subfield>
    <subfield code="w">BR2025001412</subfield>
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  <datafield tag="856" ind1=" " ind2=" ">
    <subfield code="u">https://ajaes.ufra.edu.br/index.php/ajaes/article/view/2927/1537</subfield>
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  <datafield tag="942" ind1=" " ind2=" ">
    <subfield code="c">ANA</subfield>
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  <datafield tag="999" ind1=" " ind2=" ">
    <subfield code="c">331888</subfield>
    <subfield code="d">331888</subfield>
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