The anode supported internal cathode tubular solid oxide fuel cell: Novel production of a cell geometry for combined heat and power applications

Hartwell, Alexander R.; Welles, Thomas S.; Ahn, Jeongmin

doi:10.1016/j.ijhydene.2021.09.060

Cited by 7 publications

(2 citation statements)

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“…Changes in cell morphology have however shown to be minimal in previous work, with carbon deposition dominating cell performance variation [31]. The absence of methane from the fuel stream prevents hydrocarbon cracking [48,49], but carbon monoxide disproportionation may occur, as in Equation (5).…”

Section: Longevity and Carbon Deposition Examinationsmentioning

confidence: 96%

“…DFFC instability caused by variations in flame structure and therefore variation in temperature and fuel concentration/composition have motivated the development of alternative strategies. By separating the combustion reaction and SOFCs, these instabilities may be avoided while still utilizing the heat and exhaust species produced via hydrocarbon combustion, yielding flame-assisted fuel cells (FFCs) [4][5][6][7][8][9][10]. Within the context of heating systems such as furnaces and boilers, this ability to use FFCs is a particularly powerful concept and many SOFC-combined heat and power (CHP) systems have been investigated [4,[11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Synthesis Gas Concentration, Composition, and Operational Time on Tubular Solid Oxide Fuel Cell Performance

et al. 2022

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There is tremendous potential to utilize the exhaust gases and heat already present within combustion chambers to generate electrical power via solid oxide fuel cells (SOFCs). Variations in system design have been investigated as well as thorough examinations into the impacts of environmental conditions and fuel composition/concentration on SOFC performance. In an attempt to isolate the impacts of carbon monoxide and hydrogen concentration ratios within the exhaust stream, this work utilizes multi-temperature performance analyses with simulated methane combustion exhaust as fuel combined with dilute hydrogen baseline tests. These comparisons reveal the impacts of the complex reaction pathways carbon monoxide participates in when used as an SOFC fuel. Despite these complexities, performance reductions as a result of the presence of carbon monoxide are low when compared to similarly dilute hydrogen as a fuel. This provides further motivation for the continued development of SOFC-CHP systems. Stability testing performed over 80 h reveals the need for careful control of the operating environment as well as signs of carbon deposition. As a result of gas flow disruption, impacts of anode oxidation that may normally not hinder power production become significant factors in addition to coarsening of the anode material. Thermal management and strategies to minimize these impacts are a topic of future research.

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