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I am trying to find out correlation for ignition delay for alkane fuels. The activation energy part of the correlation gives me a negative value. For the ignition delay formulation, is it possible to have an overall activation energy part being negative?

$$\tau = P^aT^b\phi^c\exp\left(\frac{E_\mathrm{a}}{RT}\right)$$

Martin - マーチン
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Pragnesh Rana
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    Well, it sure is possible and does happen sometimes for complex reactions, dunno if it applies for your case, though. – Mithoron Dec 15 '19 at 14:20
  • This might be helpful: https://chemistry.stackexchange.com/questions/95343/is-negative-activation-energy-possible – theorist Dec 15 '19 at 23:45

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