Solid oxide fuel cell and advanced combustion engine combined cycle: A pathway to 70% electrical efficiency

Chuahy, Flavio Dal Forno; Kokjohn, Sage

doi:10.1016/j.apenergy.2018.10.132

Cited by 86 publications

(43 citation statements)

References 52 publications

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“…The increase in greenhouse gases due to fossil fuels, as well as the growing demand for energy, has resulted in a corresponding need for alternative energy sources. Among many possibilities, the solid oxide fuel cell (SOFC) remains a major alternative due to its high theoretical efficiency when compared with heat engines [1]. The SOFC can efficiently generate electricity while using hydrogen produced from the solid oxide electrolysis cells (SOECs).…”

Section: Introductionmentioning

confidence: 99%

Sr Substituted La2−xSrxNi0.8Co0.2O4+δ (0 ≤ x ≤ 0.8): Impact on Oxygen Stoichiometry and Electrochemical Properties

et al. 2022

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Lanthanide nickelate Ln2NiO4+δ (Ln = La, Pr, or Nd) based mixed ionic and electronic conducting (MIEC) materials have drawn significant attention as an alternative oxygen electrode for solid oxide cells (SOCs). These nickelates show very high oxygen diffusion coefficient (D*) and surface exchange coefficient (k*) values and hence exhibit good electrocatalytic activity. Earlier reported results show that the partial substitution of Co2+ at B-site in La2Ni1−xCoxO4+δ (LNCO) leads to an enhancement in the transport and electrochemical properties of the material. Herein, we perform the substitution at A-site with Sr, i.e., La2−xSrxNi0.8Co0.2O4+δ, in order to further investigate the structural, physicochemical, and electrochemical properties. The structural characterization of the synthesized powders reveals a decrease in the lattice parameters as well as lattice volume with increasing Sr content. Furthermore, a decrease in the oxygen over stoichiometry is also observed with Sr substitution. The electrochemical measurements are performed with the symmetrical half-cells using impedance spectroscopy in the 700–900 °C temperature range. The total polarization resistance of the cell is increased with Sr substitution. The electrode reaction mechanism is also studied by recording the impedance spectra under different oxygen partial pressures. Finally, the kinetic parameters are investigated by analyzing the impedance spectra under polarization. A decrease in exchange current density (i0) is observed with increasing Sr content.

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Section: Introductionmentioning

confidence: 99%

Sr Substituted La2−xSrxNi0.8Co0.2O4+δ (0 ≤ x ≤ 0.8): Impact on Oxygen Stoichiometry and Electrochemical Properties

et al. 2022

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“…185 Due to the high temperatures in the fuel cells, the formation of NO x can still be an issue. 186 For ammonia, formic acid and methanol fuel cells are being researched that only operate with these specific fuels. [187][188][189] 5.2.2 Combustion engines.…”

Section: Fuel Cellsmentioning

confidence: 99%

Challenges in the use of hydrogen for maritime applications

Hoecke

Laffineur

Campe

et al. 2021

Energy Environ. Sci.

224

107

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“…A combined heat and power (CHP) generator has a 30% electric conversion efficiency and 45% heat conversion efficiency [48], while a fuel cell has a 70% electric conversion efficiency [49]. The expected electricity production per m 3 digester volume using the produced biogas from the AD-MEC (during the last 11 days of digestion) in a fuel cell is 1.5 kwh/m 3 /d, which is more than double the electricity production than AD-only (0.7 kwh/m 3 /d), due to the 149% higher daily CH 4 and H 2 production in the AD-MEC system (Table 1).…”

Section: Biogas Utilization In a Fuel Cell Or Combined Heat And Power (Chp) Generatormentioning

confidence: 99%

Bio-Electrochemical Enhancement of Hydrogen and Methane Production in a Combined Anaerobic Digester (AD) and Microbial Electrolysis Cell (MEC) from Dairy Manure

et al. 2020

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Anaerobic digestion (AD) is a biological-based technology that generates methane-enriched biogas. A microbial electrolysis cell (MEC) uses electricity to initiate bacterial oxidization of organic matter to produce hydrogen. This study determined the effect of energy production and waste treatment when using dairy manure in a combined AD and MEC (AD-MEC) system compared to AD without MEC (AD-only). In the AD-MEC system, a single chamber MEC (150 mL) was placed inside a 10 L digester on day 20 of the digestion process and run for 272 h (11 days) to determine residual treatment and energy capacity with an MEC included. Cumulative H2 and CH4 production in the AD-MEC (2.43 L H2 and 23.6 L CH4) was higher than AD-only (0.00 L H2 and 10.9 L CH4). Hydrogen concentration during the first 24 h of MEC introduction constituted 20% of the produced biogas, after which time the H2 decreased as the CH4 concentration increased from 50% to 63%. The efficiency of electrical energy recovery (ηE) in the MEC was 73% (ηE min.) to 324% (ηE max.), with an average increase of 170% in total energy compared to AD-only. Chemical oxygen demand (COD) removal was higher in the AD-MEC (7.09 kJ/g COD removed) system compared to AD-only (6.19 kJ/g COD removed). This study showed that adding an MEC during the digestion process could increase overall energy production and organic removal from dairy manure.

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Solid oxide fuel cell and advanced combustion engine combined cycle: A pathway to 70% electrical efficiency

Cited by 86 publications

References 52 publications

Sr Substituted La2−xSrxNi0.8Co0.2O4+δ (0 ≤ x ≤ 0.8): Impact on Oxygen Stoichiometry and Electrochemical Properties

Sr Substituted La2−xSrxNi0.8Co0.2O4+δ (0 ≤ x ≤ 0.8): Impact on Oxygen Stoichiometry and Electrochemical Properties

Challenges in the use of hydrogen for maritime applications

Bio-Electrochemical Enhancement of Hydrogen and Methane Production in a Combined Anaerobic Digester (AD) and Microbial Electrolysis Cell (MEC) from Dairy Manure

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