Integrated thermal reforming and electro-oxidation in ammonia-fueled tubular solid oxide fuel cells toward autothermal operation

Jantakananuruk, Nattikarn; Page, Jeffrey R.; Armstrong, Cameron D.; Persky, Joshua; Datta, Ravindra; Teixeira, Andrew R.

doi:10.1016/j.jpowsour.2022.231999

Cited by 9 publications

(3 citation statements)

References 24 publications

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“…This technology allows for the direct use of ammonia as fuel, being cracked at elevated temperatures ranging between 500 and 1000 • C, either by direct or indirect methods. As shown in Figure 11, ammonia is first catalytically decomposed in N 2 and H 2 , and then the hydrogen produced is electrochemically transformed into water and electrical power [165][166][167][168][169][170]. For indirect decomposition, the reactor must be in contact with the fuel cell, thus providing heat transfer between the two units [171].…”

Section: Green Ammonia As a Fuel-cell For Clean Enginesmentioning

confidence: 99%

Current Research on Green Ammonia (NH3) as a Potential Vector Energy for Power Storage and Engine Fuels: A Review

et al. 2023

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Considering the renewable electricity production using sustainable technologies, such as solar photovoltaics or wind turbines, it is essential to have systems that allow for storing the energy produced during the periods of lower consumption as well as the energy transportation through the distribution network. Despite hydrogen being considered a good candidate, it presents several problems related to its extremely low density, which requires the use of very high pressures to store it. In addition, its energy density in volumetric terms is still clearly lower than that of most liquid fuels. These facts have led to the consideration of ammonia as an alternative compound for energy storage or as a carrier. In this sense, this review deals with the evaluation of using green ammonia for different energetic purposes, such as an energy carrier vector, an electricity generator and E-fuel. In addition, this study has addressed the latest studies that propose the use of nitrogen-derived compounds, i.e., urea, hydrazine, ammonium nitrate, etc., as alternative fuels. In this study, the possibility of using other nitrogen-derived compounds, i.e., an update of the ecosystem surrounding green ammonia, has been assessed, from production to consumption, including storage, transportation, etc. Additionally, the future challenges in achieving a technical and economically viable energy transition have been determined.

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Section: Green Ammonia As a Fuel-cell For Clean Enginesmentioning

confidence: 99%

Current Research on Green Ammonia (NH3) as a Potential Vector Energy for Power Storage and Engine Fuels: A Review

et al. 2023

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“…Solid oxide cells (SOCs) consist of solid oxide fuel cells (SOFCs) and solid oxide electrolysis cells (SOECs). They are regarded as one of the most promising energy conversion and storage devices for sustainable and green energy development. − SOCs are capable of both energy storage and regeneration in an intermediate temperature range of 600–800 °C with remarkably high efficiencies and low greenhouse emissions. , SOC applications that electrochemically convert the chemical energy of liquid or gaseous fuels into electricity have been dedicated to carbon-neutral power generation and supply as an alternative to fossil-derived energy. Therefore, SOC technology has the potential to be a key aspect in achieving carbon-neutrality. − …”

Section: Introductionmentioning

confidence: 99%

Rational Design of NiO-8YSZ Screen-Printing Slurry for High-Performance Large-Area Solid Oxide Cells

Liao³

et al. 2023

J. Phys. Chem. C

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An efficient and stable NiO-8YSZ hydrogen electrode for solid oxide cells (SOCs) is vital in the context of increasing global intermittent renewable energy sources. Most fundamental studies of SOCs have been carried out using button cells with small active areas, whereas the screen-printing of NiO-8YSZ hydrogen electrodes required for large-area SOCs have been ignored. In this study, we provide an alternative method for designing a highly active and stable fuel electrode for SOCs application by improving the slurry dispersant effect. The dispersion states and stabilities of NiO-8YSZ screen-printing slurries were quantitatively analyzed using the instability index, relaxation time, and viscosity. Scanning electron microscopy images of the resultant films indicate that the microstructure can be improved by optimizing the dispersants within the ink. The electrochemical performance of the resulting SOCs with optimized hydrogen electrode microstructures was examined at a 5 × 5 cm 2 scale (16 cm 2 active area). Single cells delivered a peak power density of 0.57 W•cm −2 at 750 °C in fuel cell mode and had a high current density of −0.81 A•cm −2 at 1.30 V in electrolysis mode. These results highlight the potential for large-scale high-performance SOCs production by designing NiO-8YSZ electrode nanostructures via a proper dispersant with the stability of screen-printing paste.

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“…Fertilizer production constitutes approximately 85 % of the total ammonia produc-tion [7]. Recently, ammonia has attracted great interest as a promising fuel due to its carbon-free, high energy density [8]. However, in the production of ammonia, fly ash, nitrogen oxides (NO x ) and carbon dioxide (CO 2 ) are released.…”

Section: Introductionmentioning

confidence: 99%

Comparative Life Cycle Assessment and Exergy Analysis of Coal‐ and Natural Gas‐Based Ammonia Production

Çetinkaya,

Bilgili,

Kuzu

et al. 2023

Chem Eng & Technol

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A comprehensive life cycle assessment (LCA) analysis of ammonia production is presented, focusing on the comparison between natural gas‐based and coal‐based processes. Ammonia production is associated with high energy consumption and significant carbon dioxide (CO2) emissions. The objective of this research is to identify key processes and parameters within the ammonia synthesis industry and provide recommendations for cleaner and more sustainable development. Exergy analysis is performed to assess the efficiency of ammonia production technologies and determine optimal operating conditions. Natural gas‐based ammonia production has lower environmental impacts compared to coal‐based production in most categories, except for ionizing radiation. Natural gas, being a cleaner‐burning fossil fuel, produces fewer greenhouse gas emissions and other air pollutants. However, it is essential to address the issue of ionizing radiation in natural gas‐based processes. The potential for more efficient technologies and the importance of removing sulfur and other impurities during the production process to optimize catalyst performance are highlighted.

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Integrated thermal reforming and electro-oxidation in ammonia-fueled tubular solid oxide fuel cells toward autothermal operation

Cited by 9 publications

References 24 publications

Current Research on Green Ammonia (NH3) as a Potential Vector Energy for Power Storage and Engine Fuels: A Review

Current Research on Green Ammonia (NH3) as a Potential Vector Energy for Power Storage and Engine Fuels: A Review

Rational Design of NiO-8YSZ Screen-Printing Slurry for High-Performance Large-Area Solid Oxide Cells

Comparative Life Cycle Assessment and Exergy Analysis of Coal‐ and Natural Gas‐Based Ammonia Production

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