Loading...
Publication
Oxidative denitrogenation of a simulated fuel under a biphasic green system
| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| 280.34 KB | Adobe PDF |
Advisor(s)
Abstract(s)
Este trabalho trata da desnitrificação catalítica de um combustível simulado (quinolina (QN) em
2,2,4-trimetilpentano) por oxidação com peróxido de hidrogénio em meio bifásico. Como catalisadores, foram
utilizados três materiais: (i) ferro suportado em alumina (Fe/Al2O3) obtido por sol-gel, (ii) nanotubos de
carbono (CNT) produzidos através da deposição química em fase de vapor de propileno (PP) sobre o
catalisador anterior (Fe/Al2O3), e (iii) os CNT fornecidos pela Sigma Aldrich. A contribuição da adsorção e da
extração foi avaliada, sendo ambas consideradas desprezáveis ou pouco efetivas para a remoção da QN. O
desempenho de cada material foi analisado em testes de reação de 4 h, a 80 °C, através da monitorização da
degradação de H2O2 e da concentração de QN em meio oleoso e aquoso. Como resultados, todos os materiais
utilizados atenderam ao objetivo proposto, sendo 100% da QN removida da fase oleosa nos ensaios de
oxidação bifásica. Em resumo, todos os catalisadores produzidos foram eficientes no processo proposto e são
comparáveis ao desempenho obtido pelo CNT comercial
This work deals with the catalytic denitrogenation of a simulated fuel (quinoline (QN) in 2,2,4-trimethylpentane) by oxidation with hydrogen peroxide in a biphasic medium. As catalysts, three materials were used (i) iron supported on alumina (Fe/Al2O3) obtained by sol-gel, carbon nanotubes (CNT) produced by chemical vapor deposition of propylene (PP) growth on the previous catalyst (Fe/Al2O3) and (iii) a commercial sample of CNT supplied by Sigma Aldrich. The contribution of adsorption and extraction was also assessed, both being considered negligible or ineffective for the removal of QN. The performance of each catalyst was analysed in 4 h reaction tests, at 80 °C, by monitoring the degradation of H2O2 and the concentration of QN in the oily and aqueous media. As a result, all catalysts used met the proposed objective, with 100% of QN being removed from the oily phase in the biphasic oxidation tests. In summary, all the catalysts produced were efficient in the proposed process and are comparable to the performance obtained by the commercial CNT sample.
This work deals with the catalytic denitrogenation of a simulated fuel (quinoline (QN) in 2,2,4-trimethylpentane) by oxidation with hydrogen peroxide in a biphasic medium. As catalysts, three materials were used (i) iron supported on alumina (Fe/Al2O3) obtained by sol-gel, carbon nanotubes (CNT) produced by chemical vapor deposition of propylene (PP) growth on the previous catalyst (Fe/Al2O3) and (iii) a commercial sample of CNT supplied by Sigma Aldrich. The contribution of adsorption and extraction was also assessed, both being considered negligible or ineffective for the removal of QN. The performance of each catalyst was analysed in 4 h reaction tests, at 80 °C, by monitoring the degradation of H2O2 and the concentration of QN in the oily and aqueous media. As a result, all catalysts used met the proposed objective, with 100% of QN being removed from the oily phase in the biphasic oxidation tests. In summary, all the catalysts produced were efficient in the proposed process and are comparable to the performance obtained by the commercial CNT sample.
Description
Keywords
Desnitrificação oxidativa Quinolina Oxidação bifásica Nanomateriais de carbono Peróxido de hidrogénio Research Subject Categories::NATURAL SCIENCES::Chemistry
Pedagogical Context
Citation
Roman, Fernanda; Piccinin, Larissa; Freitas, Isabella Veronica; Díaz de Tuesta, Jose Luis; Silva, Adrián; Faria, Joaquim; Vieira, Admilson L.; Lenzi, Giane G.; Gomes, Helder (2022). Oxidative denitrogenation of a simulated fuel under a biphasic green system. In XXVIII Congresso Ibero-Americano de Catálise. Natal: Sociedade Brasileira de Catálise. p. 1-6. ISBN 978-989-8124-23-4
Publisher
Sociedade Brasileira de Catálise