https://repositorio.ufpb.br/jspui/handle/123456789/11127 Thu, 03 Sep 2026 10:50:58 GMT 2026-09-03T10:50:58Z https://repositorio.ufpb.br/jspui/handle/123456789/38722 Título: PANORAMA DO HIDROGÊNIO VERDE NO BRASIL: TECNOLOGIA, POLÍTICAS E PERSPECTIVAS FUTURAS Autor(es): DOMICIANO, MAX WEBBER OLIVEIRA Orientador: Jaguaribe, Danielle Christine Almeida Abstract: This paper analyzes the landscape of green hydrogen in Brazil, with emphasis on production technologies, the regulatory framework, and the prospects for the country's strategic insertion in the context of the global energy transition. Produced via electrolysis of water supplied by clean sources, green hydrogen has been identified as one of the main ways to reduce emissions in industrial sectors where direct electrification faces technical limitations, including fertilizer manufacturing, the steel industry, and the production of synthetic fuels. The research, of a qualitative, exploratory, and descriptive-analytical nature, was based on a literature review, document analysis of public policies, and data collection from official bodies. The main technological routes were examined, highlighting alkaline electrolysis, PEM, and solid oxide, as well as the thermochemical route through biomass gasification, especially sugarcane bagasse, evidencing its synergy with the sugar-energy sector. The results indicate that Brazil is in the preimplementation phase of industrialization, with progress in memoranda of understanding, port hubs, and the formulation of regulatory frameworks. In the Northeast, strategic potential is observed due to the high availability of solar and wind energy. It is concluded that green hydrogen represents an opportunity to diversify the national energy matrix and strengthen the integrated biorefinery model, especially in the context of the sugarcane and ethanol sector, potentially positioning Brazil as a protagonist in the low-carbon economy. Editor: Universidade Federal da Paraíba Tipo: TCC Tue, 31 Mar 2026 00:00:00 GMT https://repositorio.ufpb.br/jspui/handle/123456789/38722 2026-03-31T00:00:00Z https://repositorio.ufpb.br/jspui/handle/123456789/36258 Título: INFLUÊNCIA DA GRANULOMETRIA NA SACARIFICAÇÃO E FERMENTAÇÃO NA PRODUÇÃO DE ETANOL DE MILHO Autor(es): SIQUEIRA SEGUNDO, PEDRO ANDRÉ DE Orientador: VASCONCELOS, SOLANGE MARIA DE Abstract: This study aimed to evaluate the influence of corn particle size on ethanol production, considering the liquefaction, saccharification, and alcoholic fermentation stages. Ground corn samples with sieved granulometry (20 Mesh) and unsieved granulometry were used, subjected to the addition of 0.32 mL of αamylase at 90°C and 0.32 mL of glucoamylase at 60°C, followed by fermentation with Saccharomyces cerevisiae (FT858L) at 30°C, 150 rpm, in a shaker incubator for 24 hours. The experiments were carried out on a laboratory scale, monitoring parameters such as starch content, soluble solids (°Brix), and alcohol content. The results showed that particle size variation did not promote significant differences in saccharification or fermentation, since both samples presented very similar soluble solids (°Brix) during saccharification, as well as close alcoholic content (°GL) and productivity, with mean values between 1.33 and 1.55 g/L for the sieved sample and 1.91 and 1.98 g/L for the unsieved sample. The average efficiency of the processes, regarding ethanol production based on processed starch dry mass, ranged from 43.97 to 47.27%. Under the conditions evaluated in this work, the use of standardized or heterogeneous corn particle size was not a limiting factor for ethanol production, reinforcing the importance of commercial enzymes and fermentation process standardization as key determinants for yield. Editor: Universidade Federal da Paraíba Tipo: TCC Mon, 29 Sep 2025 00:00:00 GMT https://repositorio.ufpb.br/jspui/handle/123456789/36258 2025-09-29T00:00:00Z https://repositorio.ufpb.br/jspui/handle/123456789/36215 Título: SIMULAÇÃO DA DESTILAÇÃO EXTRATIVA PARA PRODUÇÃO DE ETANOL ANIDRO: INFLUÊNCIA DO TEOR DE LÍQUIDO IÔNICO [EMIN][Ac] EM MISTURA COM ETILENOGLICOL SOBRE O DESEMPENHO ENERGÉTICO DO PROCESSO Autor(es): SILVA, AMANDA VITORIA EVANGELISTA DA Orientador: VASCONCELOS, ANGELA LUCÍNIA URTIGA Abstract: A destilação extrativa é uma técnica amplamente utilizada para superar as limitações impostas pelos azeótropos, como no caso do sistema etanol-água, cuja mistura apresenta comportamento azeotrópico que impede a obtenção de etanol anidro apenas por destilação simples. Tradicionalmente, o etilenoglicol tem sido empregado como agente de arraste (entrainer) nesse processo, devido à sua alta seletividade e capacidade de alterar a volatilidade relativa entre etanol e água. No entanto, o uso do etilenoglicol apresenta desvantagens significativas, incluindo alto ponto de ebulição, maior consumo energético para recuperação do solvente, potencial toxicidade ambiental e dificuldades de manuseio e descarte. Os líquidos iônicos se enquadram como alternativas promissoras para a destilação extrativa. Esses compostos apresentam baixa pressão de vapor, alta estabilidade térmica e podem ser projetados para oferecer seletividade adequada, reduzindo emissões e impactos ambientais. Assim, este trabalho tem como objetivo na metodologia, foi desenvolvido um modelo de simulação no Aspen Plus, adotando o modelo termodinâmico NRTL para representar o comportamento de sistemas não ideais. A partir dele, foram analisados diferentes cenários, alterando-se a proporção entre etilenoglicol e o líquido iônico [EMIM][Ac]. Os resultados indicaram que a concentração de 20% de [EMIM][Ac] e 80% de etilenoglicol apresentaram um melhor desempenho representado no caso 3 ou seja, quantidades moderadas do líquido iônico proporcionaram maior pureza do etanol e menor consumo específico de energia (SEC). Editor: Universidade Federal da Paraíba Tipo: TCC Wed, 29 Jan 2025 00:00:00 GMT https://repositorio.ufpb.br/jspui/handle/123456789/36215 2025-01-29T00:00:00Z https://repositorio.ufpb.br/jspui/handle/123456789/36214 Título: SIMULAÇÃO DA DESTILAÇÃO EXTRATIVA PARA PRODUÇÃO DE ETANOL ANIDRO: INFLUÊNCIA DO TEOR DO LÍQUIDO IÔNICO [EMIM][BF₄] EM MISTURA COM ETILENOGLICOL SOBRE O DESEMPENHO ENERGÉTICO DO PROCESSO Autor(es): SILVA, ANA BEATRIZ DA Orientador: VASCONCELOS, ANGELA LUCÍNIA URTIGA Abstract: Anhydrous ethanol is a strategic product for the energy and chemical sectors, but obtaining it in high purity is hampered by the presence of the ethanol-water azeotrope, which makes separation by conventional distillation impossible. Among the alternatives employed, extractive distillation stands out, particularly due to the use of solvents that modify the vaporliquid equilibrium. In this context, ionic liquids have been studied as more sustainable replacements for traditional solvents, such as ethylene glycol (EG). This work aimed to simulate and evaluate the extractive distillation of the ethanol-water system using ethylene glycol (EG) and the ionic liquid 1-ethyl-3-methylimidazolium tetrafluoroborate ([EMIM][BF₄]) as solvents. To this end, a flowchart representing the industrial process was developed in Aspen Plus, adopting the NRTL thermodynamic model to calculate vapor-liquid equilibrium. Different proportions of [EMIM][BF₄] and EG were analyzed, evaluating their influence on anhydrous ethanol purity, reboiler and condenser thermal loads, and specific energy consumption (SEC). The results showed that ethanol purity at the top of the column remained in the range of 0.995 up to approximately 40% [EMIM][BF₄], a condition considered optimal. In this range, a maximum reduction in the total reboiler load to approximately 63.2 kW and a lower SEC value of 0.682 kWh/kg were observed, indicating significant energy gains compared to cases with a lower amount of ionic liquid. At higher concentrations, above 50% IL, a purity reduction specification (decrease to ≈0.994) and an increase in overall energy consumption were observed, compromising the process viability. It is concluded that the combined use of EG and [EMIM][BF₄] can improve the energy efficiency of extractive distillation, with the 40% IL and 60% EG scenario being the most promising, as it combines lower energy consumption with maintained product quality. The study also highlights the potential of ionic liquids as alternative entrainers, although additional economic and environmental analyses are needed for industrialscale validation. Editor: Universidade Federal da Paraíba Tipo: TCC Fri, 26 Sep 2025 00:00:00 GMT https://repositorio.ufpb.br/jspui/handle/123456789/36214 2025-09-26T00:00:00Z