Redução do índice de acidez através da neutralização e esterificação para produção de biodiesel

Rovere, Bruno Oliveira; Rodrigues, Johnata Henrique; Teleken, Joel Gustavo

doi:10.34117/bjdv6n5-064

Cited by 3 publications

(1 citation statement)

References 9 publications

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“…One way to try to probably reduce the acidity index in the product formed in this case, maintaining the ethyl route and the temperature conditions and the catalyst mass would be to increase the oil:alcohol molar ratio. Another way to reduce, when you have acidic oils and/or biodiesel, would be to perform an acid pretreatment with alcohol and sulfuric acid followed by a transesterification reaction 74,75 , neutralization or esterification reaction 72 .…”

Section: Catalytic Test In the Transesterification Reactionmentioning

confidence: 99%

Synthesis of NiMoO4 by the Complexation Method Combining EDTA-Citrate and its Behavior Against Biodiesel Acidity

Silva

et al. 2021

Mat. Res.

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In this paper, NiMoO 4 powder was synthesized by the complexation method combining EDTA-Citrate. The behavior of the NiMoO 4 material in the ethyl transesterification reaction was evaluated by analyzing the acidity index under specified reaction conditions. The results showed that NiMoO 4 crystallized at 800 °C with a total mass loss of 85%, presenting a monoclinic structure, free of secondary phases, high degree of crystallinity and average crystallite size of 140 nm. The particles had heterogeneous sizes and shapes, but with well-defined contours. The increase in the mass of NiMoO 4 in the reaction medium reduced the acidity index (0.8 mgKOH.g -1 with 15 wt.%). Despite the use of the minimum molar ratio (1:3), the ethyl route being less reactive and the use of the operating temperature close to the alcohol evaporation temperature, NiMoO 4 showed promising catalytic potential in the transesterification process.

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Section: Catalytic Test In the Transesterification Reactionmentioning

confidence: 99%

Synthesis of NiMoO4 by the Complexation Method Combining EDTA-Citrate and its Behavior Against Biodiesel Acidity

Silva

et al. 2021

Mat. Res.

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Biocatalyzed Transesterification of Waste Cooking Oil for Biodiesel Production Using Lipase from the Amazonian Fungus Endomelanconiopsis endophytica

Rodrigues,

Cardoso,

Santos

et al. 2023

Energies

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The demand for biodiesel worldwide is skyrocketing as the need to replace fossil diesel with renewable energy sources becomes increasingly pressing. In this context, biocatalysis is emerging as an environmentally friendly and highly efficient alternative to chemical catalysis. When combined with the utilization of waste materials, it has the potential to make the process of biodiesel production sustainable. In the study, the potential of an extract rich in lipase produced by an Amazonian endophytic fungus as a biocatalyst in the transesterification of waste cooking oil for biodiesel production has been systematically investigated. The fungus Endomelanconiopsis endophytica exhibited an enzyme production of 11,262 U/mL after 120 h of cultivation. The lipolytic extract demonstrated its highest catalytic activity at 40 °C and a pH of 5.5. Using soybean oil and frying residue as raw materials, biodiesel was produced through biocatalytic transesterification, and yields of 91% and 89% (wt.), respectively, were achieved. By evaluating the process parameters, a maximum biodiesel yield of 90% was achieved using ethanol at a ratio of 3:1 ratio within 120 min. The experimental results demonstrate the feasibility and sustainability of applying a fungal enzymatic extract as a biocatalyst in the production of ethyl esters using waste cooking oil as a raw material.

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Soluções Sustentáveis: Estudo da glicerina contra a carbonatação do concreto.

Barros

2024

rsc

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A construção civil, responsável por grande impacto ambiental busca alternativas sustentáveis. A carbonatação do concreto, resultante da interação do CO2 com o hidróxido de cálcio, afeta sua durabilidade. O estudo propõe o uso de glicerina como aditivo para proteger o concreto contra a carbonatação, visando viabilidade econômica e sustentabilidade ambiental. A metodologia envolveu ensaios de carbonatação em amostras de argamassa para avaliar a penetração do CO2. A glicerina foi adicionada em concentrações de 5% sobre o volume de água para verificar sua eficácia na proteção contra a carbonatação. Os testes foram realizados seguindo normas específicas e utilizando indicadores de pH para avaliar a profundidade da carbonatação. Os resultados demonstraram que a glicerina, em concentração de 5%, foi eficaz na proteção contra a carbonatação. As amostras com glicerina apresentaram coloração esverdeada, indicando reação desconhecida com os materiais da argamassa. A análise das amostras após 28 dias de cura mostrou que a profundidade da carbonatação foi inexistente, confirmando a eficácia da glicerina como aditivo protetor. A pesquisa contribui para o avanço de estratégias de proteção do concreto de forma sustentável e economicamente viável, utilizando a glicerina como alternativa renovável e barata. Em suma, os resultados obtidos evidenciam a viabilidade do uso da glicerina como aditivo na proteção contra a carbonatação do concreto. A pesquisa destaca a importância de adotar medidas preventivas e mitigadoras da carbonatação na construção civil, visando a sustentabilidade ambiental e econômica do setor.

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Redução do índice de acidez através da neutralização e esterificação para produção de biodiesel

Abstract: Redução do índice de acidez através da neutralização e esterificação para produção de biodiesel Reduction of the acidity index through neutralization and esterification for biodiesel production

Cited by 3 publications

References 9 publications

Synthesis of NiMoO4 by the Complexation Method Combining EDTA-Citrate and its Behavior Against Biodiesel Acidity

Synthesis of NiMoO4 by the Complexation Method Combining EDTA-Citrate and its Behavior Against Biodiesel Acidity

Biocatalyzed Transesterification of Waste Cooking Oil for Biodiesel Production Using Lipase from the Amazonian Fungus Endomelanconiopsis endophytica

Soluções Sustentáveis: Estudo da glicerina contra a carbonatação do concreto.

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