Limites Ópticos e Energéticos do Pré-Tratamento Ultravioleta do CO₂ na Eletrólise em Carbonatos Fundidos
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Este estudo avalia em que condições o pré-tratamento do dióxido de carbono com ultravioleta a 184,9 nm poderia reduzir a energia externa específica da eletrólise em carbonatos fundidos para produzir carbono sólido. A eletrólise constitui o processo de referência, e a UV é a modificação investigada. Balanços de massa, carga e energia definem a referência térmica a 1000 K; absorção e disponibilidade de fótons delimitam a formação de monóxido de carbono. No cenário de 10 W, 300 K, 1 bar e caminho óptico de 10 cm, estimam-se 196,31 micromoles de CO por hora. Um crédito eletroquímico idealizado corresponde a 0,0292 W, frente aos 10 W adicionados, sem constituir previsão de aproveitamento do CO pelo banho. A comparação numérica acrescenta o consumo da lâmpada sem presumir benefício químico; por isso, não testa a resposta de uma célula irradiada. Os resultados estabelecem limites e um critério de economia, sem demonstrar redução energética integrada. A confirmação da hipótese exige caracterização da fonte, balanços de espécies e ensaios comparáveis com UV ligada e desligada.
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References
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