Reaction Selectivity
Compute a reaction's selectivity, S = moles of desired product / moles of undesired product, when parallel reactions compete for the same reactant. In a chemical plant it is not enough to convert the reactant — it must be steered to the valuable product, not to byproducts. High selectivity reduces waste, separation cost and environmental impact. It is optimized by the choice of catalyst, temperature and time. Enter the moles of desired and undesired product.
Resultado
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Seletividade de reação
Num reator industrial, o reagente quase nunca tem um só caminho: ele pode formar o produto desejado (de valor) ou desviar para subprodutos indesejados, por reações paralelas ou consecutivas. A seletividade S = mols do desejado / mols do indesejado mede o quanto a reação 'mira' no alvo certo. Por que importa tanto? Porque o subproduto é desperdício triplo: consome reagente caro, exige um processo de separação (muitas vezes o maior custo da planta) e pode virar um resíduo a tratar e descartar. A seletividade é a arma da engenharia de reações: ajusta-se escolhendo o catalisador certo (que abre seletivamente o caminho desejado), a temperatura (reações concorrentes têm energias de ativação diferentes), a concentração e o tempo de residência. Um catalisador mais seletivo pode valer mais que um mais ativo. Informe os mols dos produtos desejado e indesejado.
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The results provided by this tool are for general informational and educational purposes only and do not constitute professional, financial, medical, legal, tax or accounting advice. Always confirm important decisions with a qualified professional and official sources.