Preparation and characterization of steam and CO2 activated carbon from Brazil nut shell
DOI:
https://doi.org/10.14393/BJ-v39n0a2023-64438Palavras-chave:
Activated carbon, Activation method, Adsorption.Resumo
Carvão ativado é um material poroso com várias aplicações industriais. Neste trabalho foi utilizada a casca da castanha-do-brasil para sua produção, matéria-prima promissora por possuir baixo custo e alta qualidade. Além disso, o beneficiamento da amêndoa gera grande quantidade de resíduo, necessitando de destinação adequada. O carvão foi produzido o carvão nas temperaturas de 600, 700 e 800 °C e ativado pelo método físico utilizando vapor d’água ou CO2. O rendimento foi calculado e o carvão ativado foi analisado de acordo com os seguintes parâmetros físico-químicas: teor de água, material volátil, carbono fixo, cinzas, densidade, pH. Também foram realizadas a espectroscopia de infravermelho e as isotermas de adsorção de BET. Os teores de carbono fixo dos carvões produzidos à 700 e 800 °C permaneceram acima de 84%. Os valores de pH os caracterizam como básicos. As áreas superficiais dos carvões obtidos em 800 °C foram de 397 ± 8 m2 g–1 e de 325 ± 7 m2 g–1 nos ativados com vapor d’água e CO2 respectivamente.
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Copyright (c) 2023 Pryscila Machado de Castro, Stela Regina Ferrarini, Michelle da Silva Ferreira Rimoli, Aloir Antônio Merlo, Roberta Martins Nogueira, Evaldo Martins Pires
Este trabalho está licenciado sob uma licença Creative Commons Attribution 4.0 International License.
