- Title
- Low-temperature catalytic hydrogen combustion over Pd-Cu / Al₂O₃ : Catalyst optimization and rate law determination
- Creator
- Kim, Jongho; Tahmasebi, Arash; Lee, Jang Mee; Lee, Soonho; Jeon, Chung-Hwan; Yu, Jianglong
- Relation
- ARC.DP210103025 http://purl.org/au-research/grants/arc/DP210103025
- Relation
- Korean Journal of Chemical Engineering Vol. 40, Issue 6, p. 1317-1330
- Publisher Link
- http://dx.doi.org/10.1007/s11814-023-1437-8
- Publisher
- Springer
- Resource Type
- journal article
- Date
- 2023
- Description
- Catalytic hydrogen combustion (CHC) is a promising technology for clean, efficient, and safe energy generation in hydrogen-fueled systems such as fuel cells and passive autocatalytic recombination. This study investigates catalytic hydrogen combustion over the Pd-Cu/Al₂O₃ catalysts at low temperatures (<125 °C) to determine the rate law using a differential fixed-bed reactor. The particle size distribution and reducibility of the catalysts were studied to investigate the influence of the catalyst composition on its reactivity. Higher reduction temperatures promoted the formation of metallic Pd, leading to improved catalytic reactivity at the optimized composition of Pd₀.₇₅Cu₀.₂₅/Al₂O₃. Furthermore, the rate law of CHC over the optimized catalyst was determined by non-linear regression based on the experimental reaction rates obtained under different partial pressures of H₂ and O₂. The Langmuir-Hinshelwood single-site mechanism was found to provide the best description of the catalytic combustion of hydrogen at low temperatures.
- Subject
- catalytic hydrogen combustion; bimetallic catalyst; palladium; copper; rate law; SDG 7; Sustainable Development Goals
- Identifier
- http://hdl.handle.net/1959.13/1482526
- Identifier
- uon:50951
- Identifier
- ISSN:0256-1115
- Language
- eng
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Goal 7: Ensure access to affordable, reliable, sustainable and modern energy
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