Magnesium-promoted Ni/USY catalysts prepared via surfactant-assisted melt infiltration for ammonia decomposition

Cho, Eui Hyun; Jeon, Namgi; Yoon, Byung Sun; Kim, Sujin; Yun, Yongju; Ko, Chang Hyun

doi:10.1016/j.apsusc.2022.155244

Cited by 17 publications

(5 citation statements)

References 46 publications

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“…The results showed that the surfactant-added Mg-promoted catalyst exhibited superior performance due to the high dispersion of Ni and MgO particles and the enhanced acidic and basic properties. 38 Podila et al 39 studied the substitution of La by adding Ce in LaNiO 3 and LaCoO 3 catalysts, and found that partial substitution of La by Ce in perovskite catalyst had a significant effect on the catalytic performance, especially at lower temperatures. La 0.5 Ce 0.5 NiO 3 catalyst has the highest activity among the prepared catalysts.…”

Section: The Different Methods To Promote Ammonia Decompositionmentioning

confidence: 99%

Promotion effects of different methods in CO_x-free hydrogen production from ammonia decomposition

Liang

Feng

et al. 2023

Catal. Sci. Technol.

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Section: The Different Methods To Promote Ammonia Decompositionmentioning

confidence: 99%

Promotion effects of different methods in CO_x-free hydrogen production from ammonia decomposition

Liang

Feng

et al. 2023

Catal. Sci. Technol.

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“… It is interpreted that BZY support can significantly promote the hydrogen spillover effect and reduce hydrogen poisoning to release the occupied active sites. Cho et al also prepared a series of Ni catalysts supported on the ultrastable Y (USY) zeolite, and some alkaline earth metals (Mg, Ca, Sr, and Ba) were introduced to act as dopants for improving the NH 3 decomposition reaction. It is found that it was the Mg-doped Ni/USY catalyst that showed further improvement in catalytic activity and stability among them, which could be ascribed to the enhanced number of adsorption sites of ammonia.…”

Section: Ammonia Decomposition Hydrogen Production Catalystmentioning

confidence: 99%

Review on Ru-Based and Ni-Based Catalysts for Ammonia Decomposition: Research Status, Reaction Mechanism, and Perspectives

Guan

Zhou

et al. 2023

Energy Fuels

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Hydrogen (H2) is a zero-carbon and high-energy-density fuel promising to replace fossil fuels for power generation and clean energy. However, hydrogen still faces enormous challenges in terms of production, transportation, and storage. Ammonia (NH3) is a promising H2 (17.7 wt %) carrier that easily overcomes the difficulties associated with H2 storage and transport. However, for the NH3 decomposition hydrogen production reaction, the biggest challenge at present is to achieve complete conversion of ammonia under a relatively high space velocity (about 30,000 mL·gcat –1·h–1) at low-temperature conditions (about 350 °C) with reasonable price catalysts. At present, the most efficient ammonia decomposition catalyst is a Ru-based catalyst doped with K, Ba, and Cs and supported on various carbon supports and metal oxides. Otherwise, the catalysts that exhibited the most outstanding activity among non-noble metal catalysts are nickel-based, and because of their low cost, nickel is regarded as a reasonable alternative candidate material for NH3 decomposition. Advances in the study of reaction kinetics of ammonia decomposition reactions and whether the rate-determining step of the ammonia decomposition reaction is the cleavage of the first N–H bond or the desorption of nitrogen gas are also discussed. This review provides a comprehensive consideration of the recent development of Ru-based and Ni-based catalysts and proposed mechanisms of ammonia decomposition on them are examined. The effects of preparation methods, support, and promoters on catalyst activity were studied and theoretical bases for the design of future catalysts are presented. At last, a brief introduction to catalytic membrane reactor technology in recent years is given. This review can serve as a comprehensive work for designing novel catalysts.

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“…Additionally, there is much experience with nickel catalysts in high-temperature applications, such as methane steam reforming. Nickel-based catalysts are usually deposited on oxides such as silica [14], rare earth oxides [27,28], mixed oxides [29], zeolites [30], perovskites [31], and alumina [32], and carbon nanotubes have been used as support [33]. Promoters have been successfully applied to boost the ammonia decomposition activity of nickel and ruthenium catalysts.…”

Section: Introductionmentioning

confidence: 99%

Catalyst Coatings for Ammonia Decomposition in Microchannels at High Temperature and Elevated Pressure for Use in Decentralized and Mobile Hydrogen Generation

Weissenberger,

Zapf,

Pennemann

et al. 2024

Catalysts

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We report an investigation of catalyst performance for the decomposition of ammonia under industrially relevant conditions (high temperatures of up to 800 °C and an elevated pressure of 5 bar) with further emphasis on their stability at high reaction temperatures. The catalysts were applied and tested as coatings in 500 µm wide channels of microreactors. Nickel-based catalysts were studied and compared to a ruthenium-based catalyst supported on SiO2. The effect of the support on the catalytic performance was investigated, and CeO2-supported nickel catalysts were found to exhibit the highest activity. Promoters were applied to increase the NH3 decomposition activity of the Ni/CeO2 catalysts. The addition of cesium led to a slight reduction in activity, while lanthanum, calcium, and barium doping resulted in increased activity. In particular, the barium-doped Ni/CeO2 catalyst showed very high ammonia conversion and closed the activity gap with respect to ruthenium catalysts at reactor temperatures of 650 °C and higher. The hydrogen production rates achieved in this work were compared to values in the literature and were shown to exceed values found earlier for both nickel- and ruthenium-based catalysts. Furthermore, the ruthenium-based catalysts under investigation were rapidly deactivated at 700 °C, while the nickel-based catalysts did not show deactivation after 220 h on time on stream at 700 °C.

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Magnesium-promoted Ni/USY catalysts prepared via surfactant-assisted melt infiltration for ammonia decomposition

Cited by 17 publications

References 46 publications

Promotion effects of different methods in CO_x-free hydrogen production from ammonia decomposition

Promotion effects of different methods in CO_x-free hydrogen production from ammonia decomposition

Review on Ru-Based and Ni-Based Catalysts for Ammonia Decomposition: Research Status, Reaction Mechanism, and Perspectives

Catalyst Coatings for Ammonia Decomposition in Microchannels at High Temperature and Elevated Pressure for Use in Decentralized and Mobile Hydrogen Generation

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Magnesium-promoted Ni/USY catalysts prepared via surfactant-assisted melt infiltration for ammonia decomposition

Cited by 17 publications

References 46 publications

Promotion effects of different methods in COx-free hydrogen production from ammonia decomposition

Promotion effects of different methods in COx-free hydrogen production from ammonia decomposition

Review on Ru-Based and Ni-Based Catalysts for Ammonia Decomposition: Research Status, Reaction Mechanism, and Perspectives

Catalyst Coatings for Ammonia Decomposition in Microchannels at High Temperature and Elevated Pressure for Use in Decentralized and Mobile Hydrogen Generation

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Product

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Promotion effects of different methods in CO_x-free hydrogen production from ammonia decomposition

Promotion effects of different methods in CO_x-free hydrogen production from ammonia decomposition