Ni/La2O3 and Ni/MgO–La2O3 catalysts for the decomposition of NH3 into hydrogen

Yu, Yingzhi; Gan, Yu-Meng; Huang, Chengzhi; Lu, Zhang‐Hui; Wang, Xuewen; Zhang, Rongbin; Feng, Gang

doi:10.1016/j.ijhydene.2020.04.127

Cited by 83 publications

(23 citation statements)

References 52 publications

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“…Research and development of catalysts are done on precious metals, bimetallic materials, and metal oxides [38][39][40][41][42]. The bimetallic compound is proven to improve catalytic performance even though the manufacturing is complicated.…”

Section: Nh 3 Decompositionmentioning

confidence: 99%

The Direct Reduction of Iron Ore with Hydrogen

Zhang

Nie

et al. 2021

Sustainability

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The steel industry represents about 7% of the world’s anthropogenic CO2 emissions due to the high use of fossil fuels. The CO2-lean direct reduction of iron ore with hydrogen is considered to offer a high potential to reduce CO2 emissions, and this direct reduction of Fe2O3 powder is investigated in this research. The H2 reduction reaction kinetics and fluidization characteristics of fine and cohesive Fe2O3 particles were examined in a vibrated fluidized bed reactor. A smooth bubbling fluidization was achieved. An increase in external force due to vibration slightly increased the pressure drop. The minimum fluidization velocity was nearly independent of the operating temperature. The yield of the direct H2-driven reduction was examined and found to exceed 90%, with a maximum of 98% under the vibration of ~47 Hz with an amplitude of 0.6 mm, and operating temperatures close to 500 °C. Towards the future of direct steel ore reduction, cheap and “green” hydrogen sources need to be developed. H2 can be formed through various techniques with the catalytic decomposition of NH3 (and CH4), methanol and ethanol offering an important potential towards production cost, yield and environmental CO2 emission reductions.

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Section: Nh 3 Decompositionmentioning

confidence: 99%

The Direct Reduction of Iron Ore with Hydrogen

Zhang

Nie

et al. 2021

Sustainability

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“…[52] and the NiLaO 3 compound, respectively. Yingzhi Yu et al [48] investigated the Ni/La 2 O 3 catalysts calcined in the temperature range of 450 • C-850 • C. The H 2 -TPR results recorded for these catalysts showed three reduction peaks. The first (300 • C-500 • C) and second (500 • C-600 • C) reduction stages are attributed to NiO weakly and strongly interacting with the carrier, whereas the last reduction profile (>600 • C) was assigned to the spinel and perovskite LaNiO 3 compound reduction, which confirmed the strong interaction between Ni 2+ and the support [53,54].…”

Section: Reduction Behavior Of Ni Catalystsmentioning

confidence: 99%

The Effect of Modifiers on the Performance of Ni/CeO2 and Ni/La2O3 Catalysts in the Oxy–Steam Reforming of LNG

Mosińska

Maniukiewicz

Szynkowska-Jóźwik

et al. 2021

IJMS

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This work interrogates for the first time the catalytic properties of various monometallic Ni catalysts in the oxy-steam reforming of LNG. Various research techniques, including X-ray diffraction (XRD), specific surface area and porosity analysis (BET method), scanning electron microscopy with X-ray microanalysis (SEM-EDS), temperature-programmed desorption of ammonia (TPD-NH3), temperature-programmed reduction (TPR-H2) and the FTIR method, were used to study their physicochemical properties. The mechanism of the oxy-steam reforming of LNG is also discussed in this paper. The high activity of monometallic catalysts supported on 5% La2O3–CeO2 and 5% ZrO2–CeO2 oxides in the studied process have been proven and explained on the basis of their acidity, specific surface area, sorption properties in relation to the reaction products, the crystallite size of the metallic nickel and their phase composition.

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“…The reduction effect located in the temperature range from 520-650 °C was related with the reduction of nickel oxide, which interacted more strongly with the carrier. The high temperature reduction effect observed on the TPR profile above 600 °C was ascribed to the reduction of NiO, which strongly interacted with the support or could be attributed to the perovskite or spinel phases reduction process [9][10][11]. The TPR-H2 profile of the NiO/La2O3 calc.…”

Section: Reduction Behavior Of the Investigated Catalystsmentioning

confidence: 93%

Influence of NiO/La2O3 Catalyst Preparation Method on Its Reactivity in the Oxy-Steam Reforming of LNG Process

et al. 2021

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The oxy-steam reforming of liquefied natural gas reaction (OSR-LNG) is promising process for syngas generation. In this paper, the catalytic properties of NiO/La2O3 systems prepared by wet impregnation and co-precipitation methods were extensively investigated in OSR-LNG reaction. The physicochemical properties of the studied catalytic materials were determined using various techniques including Temperature programmed reduction (TPR-H2), Temperature programmed desorption (TPD-NH3), Brunauer, Emmett and Teller (BET), X-ray diffraction (XRD) and Scanning electron microscopy (SEM) with an energy dispersive X-Ray spectrometer (EDS). Reactivity measurements performed in the OSR-LNG process showed that the catalyst preparation method and the calcination temperature significantly affected the activity of NiO/La2O3 catalysts in the OSR-LNG reaction. The catalytic activity tests showed that NiO/La2O3 system prepared by a wet impregnation method and calcined at 700 °C showed the total conversion of the LNG component at 900 °C and the highest H2 yield at 700 and 900 °C. The phase composition studies confirmed the formation of the LaNiO3 structure in the case of the NiO/La2O3 catalyst prepared by wet impregnation, calcined at the temperature of 700 °C. Catalytic activity measurements showed that the reactivity of the catalysts was related to their phase composition and acidity. SEM images of spent catalysts showed that the smallest amount of carbon deposit was detected on the surface of the most active systems.

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Ni/La2O3 and Ni/MgO–La2O3 catalysts for the decomposition of NH3 into hydrogen

Cited by 83 publications

References 52 publications

The Direct Reduction of Iron Ore with Hydrogen

The Direct Reduction of Iron Ore with Hydrogen

The Effect of Modifiers on the Performance of Ni/CeO2 and Ni/La2O3 Catalysts in the Oxy–Steam Reforming of LNG

Influence of NiO/La2O3 Catalyst Preparation Method on Its Reactivity in the Oxy-Steam Reforming of LNG Process

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