Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7705557 | International Journal of Hydrogen Energy | 2018 | 8 Pages |
Abstract
Among the alternative pathways for hydrogen production, the use of biogas from organic waste via dry reforming of methane (DRM), water gas shift reaction and pressure swing adsorption (PSA) is often seen as an interesting option. In this work, the thermodynamic performance of this type of biohydrogen energy system -additionally including a combined-cycle scheme that satisfies the electricity and steam requirements of the process- is evaluated through exergy analysis. The main data needed for the analysis are acquired from a predictive simulation model implemented in Aspen Plus®. The system shows an exergetic efficiency of 55%, with the DRM and the power generation subsystems arising as the main sources of irreversibility. Furthermore, given the significant influence found for the PSA off-gas on the thermodynamic performance of the system, two alternative process configurations based on the use of this stream are evaluated. In this regard, full recirculation of the PSA off-gas to the DRM reactor is found to improve the system's exergetic performance.
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Pedro L. Cruz, Zaira Navas-Anguita, Diego Iribarren, Javier Dufour,