Mechanism name: Z22 + ZNOx20

Presented in the Stratofly H2020 project. The mechanism (Z22 + ZNOx20) has been used in for example:

Viola, N., Fusaro, R., Ferretto, D., Gori, O., Saracoglu, B., Ispir, A. C., … & Ibron, C. (2021, September). H2020 STRATOFLY project: From Europe to Australi in less than 3 hours. In ICAS 2021 THE 32 nd CONGRESS OF THE INTERNATIONAL COUNCIL OF THE AERONAUTICAL SCIENCES.

and

Fusaro, R., Saccone, G., & Viola, N. (2024). NOx emissions estimation methodology for air-breathing reusable access to space vehicle in conceptual design. Acta Astronautica, 216, 304-317.

NOx sub-mechanism with 20 reactions and 8 species. Mechanism can be added to both Z22 and Z24 hydrogen mechanisms.