Fabricação de materiais porosos utilizando residuos sólidos da indústria de processamento de mandioca
The present study aims to evaluate the potential for reusing solid starch residues for the synthesis of porous materials. Cassava peel was used as a precursor material, and two industrial residues, an acidic residue, and a basic one for chemical activation of biochar, seeking the formation of Activa...
| Autor principal: | Bráz, Leandro Mateus |
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| Formato: | Dissertação |
| Idioma: | Português |
| Publicado em: |
Universidade Tecnológica Federal do Paraná
2020
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| Assuntos: | |
| Acesso em linha: |
http://repositorio.utfpr.edu.br/jspui/handle/1/5005 |
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| Resumo: |
The present study aims to evaluate the potential for reusing solid starch residues for the synthesis of porous materials. Cassava peel was used as a precursor material, and two industrial residues, an acidic residue, and a basic one for chemical activation of biochar, seeking the formation of Activated Carbon. Another solid residue, which is retained in the solid box at the beginning of the industrial process, was used for the synthesis of zeolite. The objective of the work was to synthesize, and characterize, the porous materials. The precursor material, bark, was collected wet in the industry, and hydrocarbonization tests were carried out in a stainless-steel reactor. After synthesis of the biochar and chemical activation, adsorption tests were carried out using methylene blue and paracetamol, indicating promising results with 98% removal for the CAs activated with residues. For the synthesis of zeolite, the precursor material was decanted, calcined for 4 hours, and after crushing, the extraction of silicon with NaOH was performed, and the synthesis of the zeolite performed with NaAlO2. The characterization of Activated Coals was carried out by means of Colorimetric Analysis that indicated the presence of carbon formation in the 12h carbonization sample, Infrared Spectroscopy by Fourrier
Transform (FTIR) indicating the formation of functional groups on the sample surface, confirming thus, the formation of porous through the process of removing methylene blue dye and paracetamol. For the characterization of Zeolite, X-ray Diffraction (XRD) analyzes were performed, which indicated the formation of Zeolite type A, according to the peaks presented and compared with the literature data, as well as Fourrier Transform Infrared Spectroscopy ( FTIR) that confirmed the crystalline characteristics of the sample through bands between 1000cm-1 and 400cm-1 . The synthesis of CAs, as well as Zeolites, was carried out on a bench scale, and through the results obtained it was confirmed that the use of starch residues in the synthesis of materials with added value was possible, making it possible for future work to be applied in scale. pilot for polishing the treatment installed in the starch shop itself, or in other industrial processes. |
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