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Metadados | Descrição | Idioma |
---|---|---|
Autor(es): dc.contributor | University of Padova | - |
Autor(es): dc.contributor | University of Ribeirão Preto (UNAERP) | - |
Autor(es): dc.contributor | Universidade Estadual Paulista (Unesp) | - |
Autor(es): dc.contributor | Science and Technology | - |
Autor(es): dc.contributor | State College | - |
Autor(es): dc.creator | Botti, Renata F. | - |
Autor(es): dc.creator | Innocentini, Murilo D.M. | - |
Autor(es): dc.creator | Faleiros, Thais A. | - |
Autor(es): dc.creator | Mello, Murilo F. | - |
Autor(es): dc.creator | Flumignan, Danilo L. [UNESP] | - |
Autor(es): dc.creator | Santos, Leticia K. [UNESP] | - |
Autor(es): dc.creator | Franchin, Giorgia | - |
Autor(es): dc.creator | Colombo, Paolo | - |
Data de aceite: dc.date.accessioned | 2022-02-22T00:26:17Z | - |
Data de disponibilização: dc.date.available | 2022-02-22T00:26:17Z | - |
Data de envio: dc.date.issued | 2020-12-11 | - |
Data de envio: dc.date.issued | 2020-12-11 | - |
Data de envio: dc.date.issued | 2020-06-01 | - |
Fonte completa do material: dc.identifier | http://dx.doi.org/10.3390/molecules25122839 | - |
Fonte completa do material: dc.identifier | http://hdl.handle.net/11449/199036 | - |
Fonte: dc.identifier.uri | http://educapes.capes.gov.br/handle/11449/199036 | - |
Descrição: dc.description | This work investigates the catalytic activity of geopolymers produced using two different alkali components (sodium or potassium) and four treatment temperatures (110 to 700 °C) for the methyl transesterification of soybean oil. The geopolymers were prepared with metakaolin as an aluminosilicate source and alkaline activating solutions containing either sodium or potassium in the same molar oxide proportions. The potassium-based formulation displayed a higher specific surface area and lower average pore size (28.64–62.54 m2/g; 9 nm) than the sodium formulation (6.34–32.62 m2/g; 17 nm). The reduction in specific surface area (SSA) after the heat treatment was more severe for the sodium formulation due to the higher thermal shrinkage. The catalytic activity of the geopolymer powders was compared under the same reactional conditions (70–75 °C, 150% methanol excess, 4 h reaction) and same weight amounts (3% to oil). The differences in performance were attributed to the influences of sodium and potassium on the geopolymerization process and to the accessibility of the reactants to the catalytic sites. The Na-based geopolymers performed better, with FAME contents in the biodiesel phase of 85.1% and 89.9% for samples treated at 500 and 300 °C, respectively. These results are competitive in comparison with most heterogeneous base catalysts reported in the literature, considering the very mild conditions of temperature, excess methanol and catalyst amount and the short time spent in reactions. | - |
Descrição: dc.description | Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq) | - |
Descrição: dc.description | Department of Industrial Engineering University of Padova, via Marzolo 9 | - |
Descrição: dc.description | Course of Chemical Engineering University of Ribeirão Preto (UNAERP) | - |
Descrição: dc.description | Institute of Chemistry Center for Monitoring and Research of the Quality of Fuels Biofuels Crude Oil and Derivatives–CEMPEQC São Paulo State University (UNESP) | - |
Descrição: dc.description | Mato Grosso Federal Institute of Education Science and Technology Campus Cuiabá, Rua Profa. Zulmira Canavarros, 95, | - |
Descrição: dc.description | Department of Materials Science and Engineering Pennsylvania State University University Park State College | - |
Descrição: dc.description | Institute of Chemistry Center for Monitoring and Research of the Quality of Fuels Biofuels Crude Oil and Derivatives–CEMPEQC São Paulo State University (UNESP) | - |
Descrição: dc.description | CNPq: 202007/2015-4 | - |
Descrição: dc.description | CNPq: 307259/2018-8 | - |
Idioma: dc.language | en | - |
Relação: dc.relation | Molecules | - |
???dc.source???: dc.source | Scopus | - |
Palavras-chave: dc.subject | Alkali | - |
Palavras-chave: dc.subject | Biodiesel | - |
Palavras-chave: dc.subject | Geopolymer | - |
Palavras-chave: dc.subject | Heterogeneous catalyst | - |
Palavras-chave: dc.subject | Transesterification | - |
Título: dc.title | Biodiesel Processing Using Sodium and Potassium Geopolymer Powders as Heterogeneous Catalysts | - |
Tipo de arquivo: dc.type | livro digital | - |
Aparece nas coleções: | Repositório Institucional - Unesp |
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