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Aos meus pais: Osvaldo do Amaral e Maria Lúcia Gonçalves de Souza Amaral, pelo essencial, fundamental e eterno apoio; À minha esposa Ana Paula Mendes de Almeida, pela parceria, companheirismo e irrestrito apoio. À minha irmã Caroline de Souza Amaral, pela força e torcida. Ao orientador Prof. Dr. Arnaldo Márcio Ramalho Prata, pela maestria, ajuda e atenção cedida. Ao co-orientador Prof. Dr. Messias Borges Silva, pelo convite à vida de pesquisador desde o mestrado, pelo companheirismo, suporte e ensinamentos. Às professoras Drª. Heizir Ferreira de Castro e Larissa de Freitas, por toda ajuda e ensinamentos. Aos amigos e companheiros do laboratório de engenharia de microalgas, Guilherme Arantes Pedro, Savienne Zorn, Eduardo Bredda, Victor Marino e Bruno Contesini, por tornar os dias mais leves e descontraídos durante o trabalho. Aos amigos Cristiano Reis, Ana Karine e Sara Machado por toda a ajuda cedida.

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One of the greatest challenges in the world is in the nal disposal of plastics in order to reduce the effect of its polluting potential. Thus, the application of pyrolysis processes in generating products of interest such as fuel oils can be part of the solution. In addition to reducing greenhouse gas emissions to the atmosphere, oil can enter the supply chain after the cracking process in petrochemical industries. In this context, this work used statistical modeling of the response surface linked to the Normal Boundary Intersection algorithm, aiming at a higher yield of oil production and major selectivity of recycled polypropylene pyrolysis. From the analysis of the mechanisms proposed in the literature with the modeling and optimization in this work, it was possible, from a kaolin mass of 9.12 g and a heating ramp of 19.37°C/min, to obtain higher percentages of aviation kerosene as well as a satisfactory performance.