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

Molecular 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 cet...

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Principais autores: Melo, Marcus Antonio de Freitas, Braga, Renata Martins Braga, Barros, Joana Maria de Farias Barros, Melo, Dulce Maria de Araújo, Aquino, Flávia de Medeiros, Freitas, Júlio Cézar de Oliveira, Santiago, Rodrigo César
Formato: article
Idioma:English
Publicado em: Journal of Thermal Analysis and Calorimetry
Assuntos:
MCM-41
Kinetic
Rice husk ash
Hydrothermal synthesis
Endereço do item:https://repositorio.ufrn.br/handle/123456789/45402
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spelling ri-123456789-454022021-12-16T15:58:42Z Kinetic study of template removal of MCM-41 derived from rice husk ash Melo, Marcus Antonio de Freitas Braga, Renata Martins Braga Barros, Joana Maria de Farias Barros Melo, Dulce Maria de Araújo Aquino, Flávia de Medeiros Freitas, Júlio Cézar de Oliveira Santiago, Rodrigo César MCM-41 Kinetic Rice husk ash Hydrothermal synthesis Molecular 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. 2021-12-16T15:58:42Z 2021-12-16T15:58:42Z 2013 article BRAGA, 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-y 1572-8943 https://repositorio.ufrn.br/handle/123456789/45402 10.1007/s10973-012-2516-y en Attribution 3.0 Brazil http://creativecommons.org/licenses/by/3.0/br/ application/pdf Journal of Thermal Analysis and Calorimetry
institution Repositório Institucional
collection RI - UFRN
language English
topic MCM-41
Kinetic
Rice husk ash
Hydrothermal synthesis
spellingShingle MCM-41
Kinetic
Rice husk ash
Hydrothermal synthesis
Melo, Marcus Antonio de Freitas
Braga, Renata Martins Braga
Barros, Joana Maria de Farias Barros
Melo, Dulce Maria de Araújo
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
description Molecular 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.
format article
author Melo, Marcus Antonio de Freitas
Braga, Renata Martins Braga
Barros, Joana Maria de Farias Barros
Melo, Dulce Maria de Araújo
Aquino, Flávia de Medeiros
Freitas, Júlio Cézar de Oliveira
Santiago, Rodrigo César
author_facet Melo, Marcus Antonio de Freitas
Braga, Renata Martins Braga
Barros, Joana Maria de Farias Barros
Melo, Dulce Maria de Araújo
Aquino, Flávia de Medeiros
Freitas, Júlio Cézar de Oliveira
Santiago, Rodrigo César
author_sort Melo, Marcus Antonio de Freitas
title Kinetic study of template removal of MCM-41 derived from rice husk ash
title_short Kinetic study of template removal of MCM-41 derived from rice husk ash
title_full Kinetic study of template removal of MCM-41 derived from rice husk ash
title_fullStr Kinetic study of template removal of MCM-41 derived from rice husk ash
title_full_unstemmed Kinetic study of template removal of MCM-41 derived from rice husk ash
title_sort kinetic study of template removal of mcm-41 derived from rice husk ash
publisher Journal of Thermal Analysis and Calorimetry
publishDate 2021
url https://repositorio.ufrn.br/handle/123456789/45402
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