Harshvardhan
Ansys Employee

Hi,
As of 2023 R2, Ansys has ended support of Energico. If you require continued use of Energico and are not able to use a previously released version, please create a support request for the technical support team.

Regarding ERN, Chemkin might help you out there. Be sure to check out the following links:
1.2. Overview of the Chemkin Software (ansys.com)
1. New Features and Enhancements (ansys.com)

I hope this helps. Other members of forum can also chime in with their helpful insights.

Regards,
Harshvardhan