Braga, Renata MartinsSilva, Janduir Egito da2019-05-102019-05-102019-01-21SILVA, Janduir Egito da. Resíduos culturais de algodão naturalmente colorido para produção de biocombustíveis e aromáticos renováveis. 2019. 102f. Tese (Doutorado em Engenharia Química) - Centro de Tecnologia, Universidade Federal do Rio Grande do Norte, Natal, 2019.https://repositorio.ufrn.br/jspui/handle/123456789/27068The crop residues of colored cottons is agricultural waste with the potential for distributed energy production. They are very resistant to drought cultivars, with national production which can be considered significant and growing, being lignocellulosic biomasses with high dry matter/ha/year production. Given the need to evaluate the energy potential of these residues, the present work has the objective of analyzing different cotton cultivars produced by EMBRAPA cotton through energy characterization and conversion of biomass to energy through the processes of rapid pyrolysis and briquetting. Biomass characterization was performed through an immediate analysis, elemental composition, hemicellulose content, cellulose and lignin, apparent density, calorific value, thermogravimetric analysis and spectroscopy in the infrared region. The results indicated significant energy potential such as high calorific value of 17 MJ/kg and low ash content (6 %), among others. Analytical pyrolysis was performed at 500 °C in a CDS 5200 HP-R CDS Analytical micro pyrolyzer, connected to a gas chromatography with mass spectrometric detection. The results of the condensable vapors composition of conventional pyrolysis indicated the presence of many oxygenated compounds of different organic groups, with aldehydes, ketones, phenols, furans and ethers, being characteristic of the decomposition of lignocellulosic materials. The enhancement of the biooil (upgrading) to enable the physico-chemical properties of the condensable vapors as fuel and/or the isolation of certain chemical compounds of these vapors was carried out through the use of three catalysts: commercial ZSM-5 and HZSM-5 at different temperatures of the catalytic bed. All the catalysts used promoted forming monoaromatics such as benzene and toluene, especially at 500 °C, with the quantities of these compounds being most expressive at this temperature, especially HZSM-5. The analyzed biomass presented favorable energy characteristics for application in thermochemical processes, while also being applied in the briquetting process using a pilot machine used to make laboratory-grade briquettes by O & C do Brasil - Automation Hydraulics. The results indicated high energy density and good mechanical resistance (9 kN/mm2 ) of the produced briquettes, especially those formed from the mixture of bark and cotton rods. Finally, it can be concluded that crop residues of colored cotton can be used in the pyrolysis process, especially in the catalytic pyrolysis process, and can be an excellent source of renewable raw material for the chemical industry, as well as to subsidize the national energy matrix.Acesso AbertoAlgodão naturalmente coloridoPirólise rápidaAromáticos renováveisZSM-5BriquetesdoctoralThesisCNPQ::ENGENHARIAS::ENGENHARIA QUIMICA