| Zugriffsnummer | 52488 |
| Dokumenttyp | Zeitschriftenartikel |
| Peer Review | mit Peer Review |
| Sprache | Englisch |
| Titel | Ammonia synthesis rate over a wide operating range: from experiments to validated kinetic models |
| Autor(in); Institution |
Nadiri, Solmaz; 3.3, Physikalische Chemie, PTB-Braunschweig
Moghaddam, Alireza Attari; Institute of Energy and Process Systems Engineering, Technische Universität Braunschweig, Braunschweig, GERMANY
Folke, Jan; Max-Planck-Institute for Chemical Energy Conversion, Department Heterogeneous Reactions, Mülheim/Ruhr, GERMANY
Ruland, Holger; Max-Planck-Institute for Chemical Energy Conversion, Department Heterogeneous Reactions, Mülheim/Ruhr, GERMANY
Shu, Bo; 3.3, Physikalische Chemie, PTB-Braunschweig
Fernandes, Ravi; 3.3, Physikalische Chemie, PTB-Braunschweig
Schlögl, Robert; Max-Planck-Institute for Chemical Energy Conversion, Department Heterogeneous Reactions, Mülheim/Ruhr, GERMANY; Fritz Haber Institute of the Max-Planck Society, Department of Inorganic Chemistry, Berlin, GERMANY
Krewer, Ulrike; Karlsruhe Institute of Technology, Institute for Applied Materials - Electrochemical Technologies, Karlsruhe, GERMANY
|
| Quelle/Jahr | ChemCatChem: 16 (2024), 23, 1 - 12 |
| Artikelnummer | e202400890 |
| Availability | [online only] |
| ISSN | 1867-3880 (online) |
| DOI | |
| Verlag | New Jersey, USA: Wiley |
| Freie Schlagworte | power-to-ammonia ; microkinetic model ; Temkin rate expression ; industrial catalyst ; Haber-Bosch process ; ammonia synthesis ; partial load |
| Zusammenfassung | With the increasing demand for flexible operation of ammonia production, the feasibility of using reaction kinetic models to predict the performance of a Haber Bosch reactor in a wide operating range must be evaluated. This study compares the feasibility of a lumped Temkin rate expression with a more complex lumped microkinetic model in predicting turnover rates across diverse temperatures and feed compositions. Evaluation and validation were carried out through ammonia synthesis experiments on a magnetite-based industrial catalyst at temperatures ranging from 548 K to 773 K and H2:N2 ratios between 4:1 to 1:1 at 90 bar. While excellent agreement between model predictions and experiments was observed at 648 K, significant discrepancies emerged at 548 K. These findings are valuable for both state-of-the-art ammonia synthesis reactors and green ammonia plants utilizing electrolysis-derived hydrogen, where flexible operating conditions are paramount. Moreover, integrating site density as a function of temperature and the partial pressure of H2 into the lumped microkinetic model marks a notable advancement, promising enhanced precision in addressing varied operating conditions. |
| Themenbereich der Metrologie | Metrologie in der Chemie und Stoffeigenschaften |
Zitierung
Nadiri, S., Moghaddam, A. A., Folke, J., Ruland, H., Shu, B., Fernandes, R., Schlögl, R., & Krewer, U. (2024). Ammonia synthesis rate over a wide operating range: from experiments to validated kinetic models. ChemCatChem, 16(23), 1–12. https://doi.org/10.1002/cctc.202400890