On the Steady-State Oxygen Permeation Through La[sub 2]NiO[sub 4+δ] Membranes

Smith, Jens B.; Norby, Truls

doi:10.1149/1.2138679

Cited by 78 publications

(63 citation statements)

References 21 publications

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“…The estimated activation energy for · i of Nd 2 NiO 4+¤ is 64-90 kJ mol ¹1 in this study, which is comparable to the reported values of Nd 2 NiO 4+¤ and La 2 NiO 4+¤ . [36][37][38] The result in Fig. 6 shows that oxide ionic conduction governs the oxygen surface exchange coefficient in Nd 2 NiO 4+¤ .…”

Section: Resultsmentioning

confidence: 92%

Relationship between Local Structure and Oxide Ionic Diffusion of Nd2NiO4+^|^delta; with K2NiF4 Structure

et al. 2014

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The relationship between the local structure and oxide ionic conduction of Nd 2 NiO 4+δ possessing the K 2 NiF 4 structure was investigated. Various oxygen nonstoichiometry samples of Nd 2 NiO 4+δ prepared with different annealing oxygen partial pressures were examined. The local structure related to oxide ionic conduction was determined by the Nd K-edge extended X-ray absorption fine structure. The oxide ionic conductivity and surface exchange coefficient were estimated using electronic conductivity relaxation methods. The activation energy for the oxide ionic conductivity was found to have a direct correlation to the surface exchange coefficient. The bottleneck size for oxide ion conduction was strongly correlated to the oxide ionic conduction of interstitial oxygen and the oxygen surface exchange rate.

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Section: Resultsmentioning

confidence: 92%

Relationship between Local Structure and Oxide Ionic Diffusion of Nd2NiO4+^|^delta; with K2NiF4 Structure

et al. 2014

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“…Thermal efficiencies reported for the AZEP cycle range from 50 [2], to 52.5% [21] for simple, non-optimized flowsheets. However, it should be noted that the AZEP turbine inlet temperature for the efficiencies cited above is 12001C, 2001C above the reported limit for the ITM reactor required for membrane stability [22,23]. The AZEP concept consists of a Brayton cycle combined with a bottoming steam cycle in addition to either an unconventional CO 2 , steam-like turbine, or a heat recovery steam generator that utilizes the availability of the combustion products exiting the ITM reactor [2].…”

Section: Advanced Zero-emission Power Plantmentioning

confidence: 99%

A review of recent developments in carbon capture utilizing oxy-fuel combustion in conventional and ion transport membrane systems

Habib

Badr

Ahmed

et al. 2010

Int. J. Energy Res.

166

102

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SUMMARYFossil fuels provide a significant fraction of the global energy resources, and this is likely to remain so for several decades. Carbon dioxide (CO 2 ) emissions have been correlated with climate change, and carbon capture is essential to enable the continuing use of fossil fuels while reducing the emissions of CO 2 into the atmosphere thereby mitigating global climate changes. Among the proposed methods of CO 2 capture, oxyfuel combustion technology provides a promising option, which is applicable to power generation systems. This technology is based on combustion with pure oxygen (O 2 ) instead of air, resulting in flue gas that consists mainly of CO 2 and water (H 2 O), that latter can be separated easily via condensation, while removing other contaminants leaving pure CO 2 for storage. However, fuel combustion in pure O 2 results in intolerably high combustion temperatures. In order to provide the dilution effect of the absent nitrogen (N 2 ) and to moderate the furnace/combustor temperatures, part of the flue gas is recycled back into the combustion chamber. An efficient source of O 2 is required to make oxycombustion a competitive CO 2 capture technology. Conventional O 2 production utilizing the cryogenic distillation process is energetically expensive. Ceramic membranes made from mixed ion-electronic conducting oxides have received increasing attention because of their potential to mitigate the cost of O 2 production, thus helping to promote these clean energy technologies. Some effort has also been expended in using these membranes to improve the performance of the O 2 separation processes by combining air separation and high-temperature oxidation into a single chamber. This paper provides a review of the performance of combustors utilizing oxy-fuel combustion process, materials utilized in ion-transport membranes and the integration of such reactors in power cycles. The review is focused on carbon capture potential, developments of oxyfuel applications and O 2 separation and combustion in membrane reactors. The recent developments in oxyfuel power cycles are discussed focusing on the main concepts of manipulating exergy flows within each cycle and the reported thermal efficiencies.

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“…Despite its simplifications, this semi-empirical equation well describes the situations where oxygen transport is limited by both surface exchange and bulk ionic conduction, as typical for La 2 NiO 4 -based materials [42,43].…”

Section: Appendixmentioning

confidence: 99%

“…The membrane material considered in the present work is intergrowth lanthanum-nickel oxide (La 2 NiO 4+δ ) [39][40][41][42][43] with K 2 NiF 4 -type structure. This composition and its derivatives exhibit a series of important advantages, namely quite high oxygen permeability, moderate thermal expansion compatible with glass-ceramic sealants and stainless steel, very low chemical-induced stresses and absence of alkaline-earth cations that may promote interaction with gaseous species such as CO 2 .…”

Section: Introductionmentioning

confidence: 99%

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Simulation of a mixed-conducting membrane-based gas turbine power plant for CO2 capture: system level analysis of operation stability and individual process unit degradation

Colombo

Хартон

Viskup

et al. 2010

J Solid State Electrochem

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A gas turbine power plant for CO 2 capture, based on oxygen-permeable membranes with mixed ionicelectronic conductivity, was analysed with respect to longterm stability by means of numerical simulation. Due to the attractive transport and physicochemical properties of mixed-conducting La 2 NiO 4+δ , this nickelate was selected as a prototype membrane material for this application. Experiments showed very slow degradation of La 2 NiO 4+δ membranes at oxygen chemical potentials close to atmospheric conditions, which are associated with kinetic demixing and other microstructure-related factors. Interaction with CO 2 in the intermediate temperature range also leads to lower oxygen permeation, whilst increasing oxygen pressure may cause partial phase decomposition and microstructural changes, thus again limiting the range of possible operation conditions. The relevant operational constraints were included in a detailed membrane-based gas turbine power plant model. The membrane performance degradation with time was approximated by a linear function with average rate of 3.3% per 1,000 operation hours. Furthermore, performance deterioration of the gas turbine compressor and turbine were also considered. Simulations revealed that the power plant is substantially affected by degradation of the ceramic membranes and turbomachinery components. The already rather small operating window was further narrowed when compared with a conventional gas turbine power plant. Two different designs of the membrane-based power plant were analysed: (1) with and (2) without additional combustors (afterburners) between the membrane reactor and the gas turbine. Afterburners increase thermal efficiency as well as power output, but also lead to non-negligible CO 2 emissions. In order to have a frame of comparison, results for a conventional gas turbine power plant with degradation of turbomachinery components are also presented. Simulations representing changes in ambient temperature and fuel composition as well as failure incidents were executed to analyse the susceptibility of the gas turbine power plant to external and internal changes.

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On the Steady-State Oxygen Permeation Through La[sub 2]NiO[sub 4+δ] Membranes

Cited by 78 publications

References 21 publications

Relationship between Local Structure and Oxide Ionic Diffusion of Nd2NiO4+^|^delta; with K2NiF4 Structure

Relationship between Local Structure and Oxide Ionic Diffusion of Nd2NiO4+^|^delta; with K2NiF4 Structure

A review of recent developments in carbon capture utilizing oxy-fuel combustion in conventional and ion transport membrane systems

Simulation of a mixed-conducting membrane-based gas turbine power plant for CO2 capture: system level analysis of operation stability and individual process unit degradation

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