Activity and deactivation of Pd/Al2O3 catalysts in hydrogen and oxygen recombination reaction; a role of alkali (Li, Cs) dopant

Lalik, E.; Drelinkiewicz, A.; Kosydar, Robert; Rojek, Wojciech; Machej, T.; Gurgul, Jacek; Szumełda, T.; Kołodziej, Michał; Bielańska, Elżbieta

doi:10.1016/j.ijhydene.2015.09.079

Cited by 22 publications

(11 citation statements)

References 24 publications

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“…The effect of water poisoning was also studied on the Pd–Au/SiO 2 and Pt–Au/Al 2 O 3 catalysts . The additive alkali, such as Li and Cs, loaded on the Pd/Al 2 O 3 catalysts were also investigated . The Li and Cs dopants showed higher affinity of water, which led to the enhanced deactivation of catalysts.…”

Section: Challenges In the Chc Processmentioning

confidence: 99%

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Review of Catalysts, Substrates, and Fabrication Methods in Catalytic Hydrogen Combustion with Further Challenges and Applications

Yuan,

Zhao,

Wang

et al. 2024

Energy Fuels

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Hydrogen energy as a clean energy source has been widely studied in recent years. Catalytic hydrogen combustion (CHC) can be used to reduce nitrogen oxide emissions and improve safety by burning hydrogen at a lower temperature. This review analyzes the effect of the hetero/homogeneous reaction mechanism, typical catalyst types (noble metal catalysts, metal oxide catalysts, and perovskite oxides), and support materials (zirconium dioxide, titanium dioxide, anodic aluminum oxide, γ-alumina, and silicon carbide) of CHC. The fabrication methods for CHC catalysts, such as impregnation, chemical vapor deposition, physical vapor deposition, combustion, sol–gel, hydrothermal treatment, and additive manufacturing, are reviewed. A series of challenges in CHC include water poisoning, sulfur poisoning, and durability. Water poisoning was broadly studied, but durability and sulfur poisoning are limitedly explored. The applications of CHC involved power and heat generations. Power generation is depicted as gas turbines and portable power generation, and heat generation is presented as heater and cooking stoves. Moreover, CHC is further applied in safety devices for nuclear power plants and confined spaces. Eventually, research gaps and future direction of the CHC process are concerned and summarized.

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Section: Challenges In the Chc Processmentioning

confidence: 99%

“…161 The additive alkali, such as Li and Cs, loaded on the Pd/Al 2 O 3 catalysts were also investigated. 162 The Li and Cs dopants showed higher affinity of water, which led to the enhanced deactivation of catalysts. Therefore, the issue of water poisoning is required to be solved in the fabrication of catalysts for the CHC process.…”

Section: Water Poisoningmentioning

confidence: 99%

Review of Catalysts, Substrates, and Fabrication Methods in Catalytic Hydrogen Combustion with Further Challenges and Applications

Yuan,

Zhao,

Wang

et al. 2024

Energy Fuels

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“…The investigation of H 2 /O 2 recombination reactions in laboratory reactors employing supported unitary Pd or Pt catalysts and/or binary Pd-Pt catalysts exposed discernible deactivation as a fluctuation of the performance due to the presence of water vapor in the reaction H 2 /O 2 mixture [14]. This moister affects both the catalyst support and active metal as Pd or Pt according to results from studies [14].…”

Section: A Brief Review Of the Literature Regarding Supported Recombi...mentioning

confidence: 99%

Palladium catalysts supported on carbonized porous silicon for H2/O2 recombination

Baktygerey Zulkarnaevna

2023

phst

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The article presents new research on the use of catalysts for H 2 /O 2 recombination. The study emphasizes the importance of ensuring safe production, storage, and utilization of green hydrogen by recombining gas leaks. We suggest the utilization of innovative palladium catalysts for low-temperature hydrogen oxidation. These catalysts leverage molecular oxygen from the air to efficiently recombine small amounts of leaked hydrogen, resulting in the production of water. Recombination catalysts with a small amount of dispersed palladium metal on an inert support are the most efficient for production to prevent the risks of hydrogen explosion and fire. This study is focused on the development of laboratory prototypes for the H 2 /O 2 recombination catalysts. We identified a potential catalytic system through monitoring of current literature to propose efficient hydrogen recombination catalysts. We present an optimized method for coating the surface of porous silicon nanoparticles with carbon layers, and introduce a technique for the production of supported palladium recombination catalysts. The proposed catalysts efficiently facilitate the recombination of hydrogen in lean air-hydrogen gas mixtures, offering a cost-effective alternative to more expensive commercial catalysts. Furthermore, they exhibit remarkable efficiency at both room and elevated temperatures. The final remarks underscore the necessity of creating new Pd catalysts to guarantee the secure storage and usage of hydrogen.

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“…This group also investigated the activity and deactivation of the H2 + O2 recombination reaction on Al2O3 and SiO2-supported Pd-Pt [95], alkali (Li, Cs)-doped Pd/Al2O3 [96] and Pd-Au catalysts [97]. An inverse relationship was established between the reaction energetics and H2 conversion (Fig.…”

Section: Assessments Of Reaction Energetics By Flow-through Microcalo...mentioning

confidence: 99%

“…The addition of Li and Cs accelerated the deactivation of the Pd/Al2O3 during the recombination reaction of H2 and O2. Microcalorimetric studies indicated that Li and Cs showed high adsorption strengths for water, leading to coverage of the active sites and therefore decreased stability [96]. In comparison, the relatively weak interactions of H2O/OH with a Pd-0.1Au/SiO2 catalyst resulted in nearly stable activity throughout the H2 and O2 recombination reaction [97].…”

Section: Assessments Of Reaction Energetics By Flow-through Microcalo...mentioning

confidence: 99%

Adsorption/reaction energetics measured by microcalorimetry and correlated with reactivity on supported catalysts: A review

Lin

et al. 2016

Chinese Journal of Catalysis

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Activity and deactivation of Pd/Al2O3 catalysts in hydrogen and oxygen recombination reaction; a role of alkali (Li, Cs) dopant

Cited by 22 publications

References 24 publications

Review of Catalysts, Substrates, and Fabrication Methods in Catalytic Hydrogen Combustion with Further Challenges and Applications

Review of Catalysts, Substrates, and Fabrication Methods in Catalytic Hydrogen Combustion with Further Challenges and Applications

Palladium catalysts supported on carbonized porous silicon for H2/O2 recombination

Adsorption/reaction energetics measured by microcalorimetry and correlated with reactivity on supported catalysts: A review

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