This work reports a practical system of hydrogenation-coupled water–gas shift reaction (HC-WGSR) for simultaneous hydrogen production and storage. The performance of the HC-WGSR system was predicted through thermodynamic simulation. The proof-of-concept tandem water–gas shift and propene hydrogenation strategy was successfully demonstrated using a bifunctional catalyst. The hydrogen produced from the WGSR was successfully stored in propane simultaneously, and the overall CO conversion of nearly 100% overcame the equilibrium limitation of the WGSR over a wide range of space velocities (3000 - 6000 h−1) at 200 °C and 1 bar. This study demonstrated that the in situ removal/storage of H2 using the hydrogenation-coupling approach is promising even in a CO2-rich environment (20% CO2). The new approach shall see a great opportunity in using organic hydrogen carriers, e.g., benzene, toluene, N-ethylcarbazole, to expand the industrial applications, underpinning the global supply chain for hydrogen energy.
Bibliographical noteFunding Information:
The authors acknowledge financial support from the Ministry of Business, Innovation & Employment in New Zealand under the MBIE Endeavour “Smart Ideas” grant (UOCX1905), and the Faculty Research Establishment Grant (Grant No. 410085_4224) funded by the Victoria University of Wellington.
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- Bifunctional catalyst
- Chemical storage
- Hydrogen generation
- Water–gas shift reaction
ASJC Scopus subject areas
- Renewable Energy, Sustainability and the Environment
- Fuel Technology
- Condensed Matter Physics
- Energy Engineering and Power Technology