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Fig. A.2

image

Arrhenius plot of the rate constants using the UMIST2012 parameters and the fit the literature values for the reaction CH4 + H  → CH3 + H2 [3]. The instanton values are from Beyer et al. (2016) The vertical dashed line indicates the lower bound for the recommended temperature range of the UMIST2012 database, Tl = 300 K.

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