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    <link>https://ri.ufs.br/jspui/handle/riufs/135</link>
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    <pubDate>Wed, 29 Jul 2026 23:32:56 GMT</pubDate>
    <dc:date>2026-07-29T23:32:56Z</dc:date>
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      <title>Optimization of MCM-48 synthesis using factorial design</title>
      <link>https://ri.ufs.br/jspui/handle/riufs/25228</link>
      <description>Título: Optimization of MCM-48 synthesis using factorial design
Autor(es): Nascimento, Alexsandra Rodrigues do; Medeiros, Rodolfo Luiz Bezerra de Araújo; Melo, Marcus Antonio de Freitas; Melo, Dulce Maria de Araújo; Souza, Marcelo José Barros de
Abstract: O material mesoporoso MCM-48 foi sintetizado hidrotermicamente de acordo com o planejamento fatorial 22&#xD;
,&#xD;
variando-se a temperatura e o tempo de cristalização do gel de síntese, e caracterizado através de análise por difração&#xD;
de raios X e adsorção de N2&#xD;
. Nas condições de temperatura e tempo de cristalização utilizadas, foram obtidas áreas&#xD;
específicas entre 924 a 1102 m2&#xD;
.g-1, volumes de poros entre 0,015 a 0,087 cm3&#xD;
.g-1 e diâmetros de poros entre 3,2 a 4,0&#xD;
nm. Observou-se que, para as sínteses realizadas com temperatura elevada, deve-se reduzir o tempo de cristalização&#xD;
para que a estrutura do material seja formada.</description>
      <pubDate>Fri, 01 Jan 2016 00:00:00 GMT</pubDate>
      <guid isPermaLink="false">https://ri.ufs.br/jspui/handle/riufs/25228</guid>
      <dc:date>2016-01-01T00:00:00Z</dc:date>
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    <item>
      <title>Optimization of a pultrusion process using finite difference and particle swarm algorithms</title>
      <link>https://ri.ufs.br/jspui/handle/riufs/25127</link>
      <description>Título: Optimization of a pultrusion process using finite difference and particle swarm algorithms
Autor(es): Santos, Lizandro de Sousa; Pagano, Rogério Luz; Calado, Veronica Maria de Araújo; Biscaia Junior, Evaristo Chalbaud</description>
      <pubDate>Mon, 01 Jun 2015 00:00:00 GMT</pubDate>
      <guid isPermaLink="false">https://ri.ufs.br/jspui/handle/riufs/25127</guid>
      <dc:date>2015-06-01T00:00:00Z</dc:date>
    </item>
    <item>
      <title>Desenvolvimento de materiais híbridos micro-mesoporosos do tipo ZSM-12/MCM-41</title>
      <link>https://ri.ufs.br/jspui/handle/riufs/25124</link>
      <description>Título: Desenvolvimento de materiais híbridos micro-mesoporosos do tipo ZSM-12/MCM-41
Autor(es): Santana, Joselaine Carvalho; Carvalho, Sanny Wedja Melo Machado de; Souza, Marcelo José Barros de; Souza, Anne Michelle Garrido Pedrosa de
Abstract: Micro-mesoporous hybrid materials of ZSM-12/MCM-41 type with different micro- and mesoporosity contributions were prepared by a procedure that uses the desilication of the zeolite in an alkaline medium, followed by recrystallization onto the mesostructure, where the zeolite is used as the silica source in the formation of mesoporous phase. The materials were characterized by X-ray diffraction, nitrogen adsorption-desorption at 77 K, scanning electron microscopy and thermal analysis. The results showed that the methodology utilized is efficient for obtaining hybrid materials of ZSM-12/MCM-41 type with optimized micro-and mesoporosity.</description>
      <pubDate>Thu, 01 Jan 2015 00:00:00 GMT</pubDate>
      <guid isPermaLink="false">https://ri.ufs.br/jspui/handle/riufs/25124</guid>
      <dc:date>2015-01-01T00:00:00Z</dc:date>
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    <item>
      <title>Effect of the acid treatment of montmorillonite clay in the oleic acid esterification reaction</title>
      <link>https://ri.ufs.br/jspui/handle/riufs/24773</link>
      <description>Título: Effect of the acid treatment of montmorillonite clay in the oleic acid esterification reaction
Autor(es): Nascimento, Alexsandra Rodrigues do; Alves, José Antônio Barros Leal Reis; Reis, José Antônio Barros Leal; Mel, Dulce Maria de Araújo; Souza, Marcelo José Barros de; Pedrosa, Anne Michelle Garrido</description>
      <pubDate>Thu, 01 Jan 2015 00:00:00 GMT</pubDate>
      <guid isPermaLink="false">https://ri.ufs.br/jspui/handle/riufs/24773</guid>
      <dc:date>2015-01-01T00:00:00Z</dc:date>
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