| Titre : | Batch reactors for hydrogen production : theoretical analysis and experimental characterization (2009) |
| Auteurs : | David L. Damm, Auteur ; Andrei G. Fedorov, Auteur |
| Type de document : | Article : texte imprimé |
| Dans : | Industrial & engineering chemistry research (Vol. 48 N° 12, Juin 2009) |
| Article en page(s) : | pp. 5610–5623 |
| Note générale : | Chemical engineering |
| Langues : | Anglais |
| Tags : | Transient batch-style reactors Hydrogen production |
| Résumé : | Transient batch-style reactors (CHAMP) were recently shown to be an attractive alternative to continuous-flow reactors for hydrogen production in portable and distributed applications, and idealized kinetic reactor models were used to analyze the performance characteristics. Here, we expand this analysis with the development of a comprehensive batch reactor model which accounts for the effects of mass transport limitations on reactor performance. The relationships between system design parameters and the rate-limiting processes that govern reactor output are identified and mapped out. Additionally, two modes of operation of either constant-volume or constant-pressure reactors are investigated. In constant-volume mode, the residence time is precisely controlled to reach a desired operating state in a trade-off between efficiency and power output without compressing the content of the reaction chamber. In constant-pressure mode, the volume of the reactor is actively reduced by moving a piston along the trajectory that maintains the operating pressure at its maximum allowable value thus enhancing the reactor throughput. Complementary to the theoretical analysis, we report on the development and experimental characterization of two test reactors. The first reactor is a constant-volume batch reactor (no permeable membrane) and provides data on the transient evolution of species concentrations within the reaction chamber. The second reactor incorporates a hydrogen permeable membrane and allows for both constant-volume and variable-volume operation. The experimental data obtained using these reactors are used to validate the predictive value of the reactor model developed in the present study. |
| En ligne : | http://pubs.acs.org/doi/abs/10.1021/ie8015126 |
