Kovaleva, M;
Dziedzic, D;
Mashruk, S;
Evans, S;
Valera-Medina, A;
Galindo-Nava, E;
(2022)
The Evaluation of Ammonia/Hydrogen Combustion on the H Permeation and Embrittlement of Nickel-Base Superalloys.
In:
ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition.
(pp. GT2022-82239, V007T17A011).
ASME: Rotterdam, Netherlands.
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Abstract
Recent studies exploring ammonia as a green hydrogen energy carrier have established its suitability for a variety of combustion technologies including gas turbines, furnaces, and internal combustion engines. Of significant interest are ammonia/hydrogen blends, which possess combustion benefits over pure ammonia, including an extended stability range and higher laminar burning velocity. Despite extensive research characterising the flame properties of these blends, very few studies explore the suitability of existing materials for the manufacture of ammonia/hydrogen combustors. The present study evaluates the impact of ammonia/hydrogen flame chemistry on the H permeation and possible loss of ductility of nickel-superalloys through exposing the samples to pure methane and ammonia/hydrogen flames at atmospheric pressure for a 5-hour period. The effect of the two flame compositions on the materials are compared through thermal desorption analysis (TDA) and room temperature tensile testing. The results showed that exposure to an ammonia/hydrogen combustion environment led to hydrogen being absorbed by the nickel superalloys but a possible variation in ductility is influenced by the combustion conditions. Furthermore, the formation of an oxide layer was shown to likely impact the hydrogen absorption rate of the materials. This work shows that ammonia/hydrogen flame chemistry on combustor materials should not be ignored and warrants further studies on material's mechanical and environmental stability controlled by nitrogen and hydrogen species permeating at industrially relevant conditions.
| Type: | Proceedings paper |
|---|---|
| Title: | The Evaluation of Ammonia/Hydrogen Combustion on the H Permeation and Embrittlement of Nickel-Base Superalloys |
| Event: | ASME Turbo Expo 2022: Turbomachinery Technical Conference and Exposition |
| Dates: | 13 Jun 2022 - 17 Jun 2022 |
| ISBN-13: | 9780791886052 |
| DOI: | 10.1115/GT2022-82239 |
| Publisher version: | https://doi.org/10.1115/GT2022-82239 |
| Language: | English |
| Additional information: | This version is the author accepted manuscript. For information on re-use, please refer to the publisher’s terms and conditions. |
| Keywords: | ammonia/hydrogen fuel, nickel superalloys, metal corrosion, H absorption |
| UCL classification: | UCL UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Mechanical Engineering |
| URI: | https://discovery.ucl.ac.uk/id/eprint/10160836 |
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