How to add a new gas chemical reaction that depend on sunlight

CMAQ
6

I believe to see your problem. My earlier advice does not work well because the RXNS_FUNC_MODULE.F90 file produced sets the rate constant for the new reaction before the referenced rate constant is defined so the new rate constant equals zero. My regrets for sending bad advice :frowning_face:.

I recommend that you follow tips posted under Add a new heterogeneous reaction that only happens with sunlight although further changes to CHEMMECH remove the problem.

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