Autothermal recirculating reactor (ARR) with Cu-BN composite as a stable reactor material for sustainable hydrogen release from ammonia

Badakhsh, Arash; Cha, Junyoung; Park, Yongha; Lee, Yujin; Jeong, Hyangsoo; Kim, Yongmin; Sohn, Hyuntae; Nam, Suk Woo; Yoon, Chang Won; Park, Chan Woo; Jo, Young Suk

doi:10.1016/j.jpowsour.2021.230081

Cited by 15 publications

(5 citation statements)

References 72 publications

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“…Through careful design and manufacturing, this reactor has the potential to significantly improve the efficiency of ammonia decomposition. One example is an autothermal recirculating reactor (ARR) 87 as indicated in Fig. 2f.…”

Section: Advanced Catalysts and Reactors For Ammonia Decompositionmentioning

confidence: 99%

“…Fig.2(a) A CMR in which an yttria-stabilized zirconium core is impregnated with Ru and deposited with a Pd film on the outside (copyright 2019 American Chemical Society);83 (b) SEM images of the cross-section and surface of the Pd/Ta/Pd composite membrane with a digital image of the membrane assembly (copyright 2020 Elsevier B.V.); 84 (c) alternating microchannel plate arrangement of NH 3 oxidation (left) and NH 3 decomposition (right) reaction zones (copyright 2018 Elsevier B.V.); 85 (d) schematic representation of the laser-welded microchannel reactor with integrated bores for ten evenly spaced thermocouples (copyright 2018 Elsevier B.V.); 85 (e) schematic illustration of the Joule-heated foam reactor with impregnated Ru/NiCrAl foam (iRu/NF) or coated cRu/NF as a heating element (copyright 2021 Elsevier B.V.); 86 (f) schematic illustration of the ARR for an ammonia-powered fuel cell with a combustor inside and reformer outside (copyright 2021 Elsevier B.V.) 87. …”

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confidence: 99%

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Ammonia as a carbon-free hydrogen carrier for fuel cells: a perspective

Zhai

Liu²,

Xiang

2023

Ind. Chem. Mater.

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Section: Advanced Catalysts and Reactors For Ammonia Decompositionmentioning

confidence: 99%

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confidence: 99%

Ammonia as a carbon-free hydrogen carrier for fuel cells: a perspective

Zhai

Liu²,

Xiang

2023

Ind. Chem. Mater.

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“…Note that Cu@BN composites are known to be used in different application fields, including composite reactor materials [46], as heat-resistant and wear-resistant coatings [47], as self-lubricating materials [48], as catalysts [49,50], etc. We hope that the present study will be interesting and useful to chemists working in the field of nanotechnologies, as it fills a gap with a very active area (carbon nanodots and composites) from the organic side.…”

Section: Electrical Conductivity Of Sample I 900mentioning

confidence: 99%

Physicochemical Fundamentals of the Synthesis of a Cu@BN Composite Consisting of Nanosized Copper Enclosed in a Boron Nitride Matrix

Malinina,

Myshletsov,

Buzanov

et al. 2023

Inorganics

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The thermal reduction of the copper(II) complexes [CuII(N2H4)3][B10H10]·nH2O (I·nH2O) and [CuII(NH3)4][B10H10]·nH2O (II·nH2O) has been studied in an argon atmosphere at 900 °C. It has been found that the annealing of both compounds results in a Cu@BN boron-containing copper composite. It has been shown that this process leads to the formation of a boron nitride matrix doped with cubic copper(0) nanoparticles due to the copper(II)→copper(I)→copper(0) thermal reduction. The phase composition of annealing products I900 and II900 has been determined based on powder X-ray diffraction, IR spectroscopy and thermal analysis data. The morphology, average particle size and composition of the composite have been determined by TEM and high-resolution TEM + EDS. The average particle size has been found to be about 81 nm and 52 nm for samples I900 and II900, respectively. Comparison of the results obtained using physicochemical studies has shown the identity of the composition of the products of annealing I900 and II900. The electrical properties of a coating based on an I900 sample modified with Cu0→Cu2O in situ during deposition on a chip at 300 °C in air have been studied. As a result, with increasing temperature, an increase in the electrical conductivity characteristic of semiconductors has been observed.

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“…Not only does it have a high volumetric energy density (15.6 MJ/L; 70% more than liquid hydrogen (H 2 ) [1]), but also it is a crucial ingredient in many industries, such as agriculture (in fertilizers) and pharmaceuticals (e.g., in antimicrobial agents). Its mild liquefaction conditions (-30 °C at 1 atm or 25 °C at 10 atm) also make this hydrogen-rich molecule (17.8 wt% H 2 ) favourable as a chemical hydrogen (H 2 ) carrier [2,3]. To unlock the full potential of this influential material, however, further research is necessary to mitigate the energy required for its production (i.e., ~2% of global energy consumption [1]) and the resultant emissions (i.e., ~1.2% of anthropogenic CO 2 emissions [4]).…”

Section: Introductionmentioning

confidence: 99%

Exsolved Ru on BaCexOy Catalysts for Thermochemical Ammonia Synthesis

Badakhsh

Vieri

Sohn

et al. 2023

International Journal of Energy Research

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Ammonia (NH3) is a carbon-free and hydrogen-rich (17.8 wt% H2) chemical that has the potential to revolutionize the energy sector. Compared with hydrogen (H2), NH3 can be easily liquefied, stored, and transported globally. However, the conventional thermocatalytic process to synthesize NH3 accounts for 2% of global energy consumption and 1.2% of CO2 emissions annually. To make the process further efficient, new catalysts must be developed to allow for NH3 synthesis in milder conditions with high thermal stability. To this end, we have developed ruthenium (Ru) supported on perovskite (BaCexOy) via a ball-milling-assisted exsolution method that allows for a more tunable morphology. Reactivity is compared with the catalyst prepared via the conventional impregnation technique. The as-synthesized catalysts are characterized by XRD, H2-TPR, TEM, XPS, and APT. The NH3 synthesis is carried out in a packed-bed tube reactor thermochemically. Using N2 instead of Ar as the carrier gas during exsolution can favour reactivity by increasing active sites and perhaps improving metal-support interaction. The impregnated sample shows higher reactivity than the exsolved catalyst; however, the long-term durability is slightly better using the exsolved catalyst. Finally, APT results interestingly show that the exsolved catalyst is more resistant to hydride formation and hydrogen poisoning, which is one of the main deactivation mechanisms for such metallic catalysts.

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Autothermal recirculating reactor (ARR) with Cu-BN composite as a stable reactor material for sustainable hydrogen release from ammonia

Cited by 15 publications

References 72 publications

Ammonia as a carbon-free hydrogen carrier for fuel cells: a perspective

Ammonia as a carbon-free hydrogen carrier for fuel cells: a perspective

Physicochemical Fundamentals of the Synthesis of a Cu@BN Composite Consisting of Nanosized Copper Enclosed in a Boron Nitride Matrix

Exsolved Ru on BaCexOy Catalysts for Thermochemical Ammonia Synthesis

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