Kinetic study of template removal of MCM-41 derived from rice husk ash

dc.contributor.authorMelo, Marcus Antonio de Freitas
dc.contributor.authorBraga, Renata Martins Braga
dc.contributor.authorBarros, Joana Maria de Farias Barros
dc.contributor.authorMelo, Dulce Maria de Araújo
dc.contributor.authorAquino, Flávia de Medeiros
dc.contributor.authorFreitas, Júlio Cézar de Oliveira
dc.contributor.authorSantiago, Rodrigo César
dc.date.accessioned2021-12-16T15:58:42Z
dc.date.available2021-12-16T15:58:42Z
dc.date.issued2013
dc.description.resumoMolecular sieves MCM-41 were synthesized from rice husk ash (RHA) as alternative sources of silica, called RHA MCM-41. The material was synthesized by a hydrothermal method from a gel with the molar composition 1.00 CTMABr:4.00 SiO2:1.00 Na2O:200.00 H2O at 100 C for 120 h with pH correction. The cetyltrimethyl- ammonium bromide (CTMABr) was used as a structure template. The material was characterized by X-ray powder diffraction, FTIR, TG/DTG, and surface area determination by the BET method. The kinetics models proposed by Ozawa, Flynn–Wall, and Vyazovkin were used to determine the apparent activation energy for CTMA? species decomposition from the pores of MCM-41 material. The results were compared with those obtained from the MCM-41 synthesized with silica gel. The synthesized material had specific surface area, size, and pore volume as specified by mesoporous materials developed from conventional sources of silica.pt_BR
dc.identifier.citationBRAGA, Renata Martins Braga; BARROS, Joana Maria de Farias Barros; MELO, Dulce Maria de Araújo; MELO, Marcus Antonio de Freitas; AQUINO, Flávia de Medeiros; FREITAS, Júlio Cézar de Oliveira; SANTIAGO, Rodrigo César. Kinetic study of template removal of MCM-41 derived from rice husk ash. Journal of Thermal Analysis and Calorimetry, v. 111, p. 1013-1018, 2013. Disponível em: https://link.springer.com/article/10.1007/s10973-012-2516-y. Acesso em: 31 ago 2021. https://doi.org/10.1007/s10973-012-2516-ypt_BR
dc.identifier.doi10.1007/s10973-012-2516-y
dc.identifier.issn1572-8943
dc.identifier.urihttps://repositorio.ufrn.br/handle/123456789/45402
dc.languageenpt_BR
dc.publisherJournal of Thermal Analysis and Calorimetrypt_BR
dc.rightsAttribution 3.0 Brazil*
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/br/*
dc.subjectMCM-41pt_BR
dc.subjectKineticpt_BR
dc.subjectRice husk ashpt_BR
dc.subjectHydrothermal synthesispt_BR
dc.titleKinetic study of template removal of MCM-41 derived from rice husk ashpt_BR
dc.typearticlept_BR

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