METODOLOGIA E VALIDAÇÃO EXPERIMENTAL DE UMA BANCADA PARA DETERMINAÇÃO DOS LIMITES DE INFLAMABILIDADE DO HVO
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O Óleo Vegetal Hidrotratado (HVO), biocombustível de segunda geração com desempenho superior ao diesel fóssil, não tem os limites de inflamabilidade determinados, sendo assumidos equivalentes ao diesel convencional nas Fichas de Segurança. Este trabalho apresenta metodologia experimental para determinação desses limites conforme a norma ASTM E681, com validação de equipamento, arcabouço teórico e planejamento experimental. Um vaso esférico de vidro de 20 L foi adaptado para os ensaios, com faixa operacional de temperatura (130–180°C) e pressão (10–101 kPa) definidas a partir da pressão de vapor e temperatura de autoignição do HVO (477 K). A validação confirma capacidade do equipamento para determinação precisa dos limites de inflamabilidade por critérios visuais de propagação de chama, com incerteza de medição combinada de ±2,19%.
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