Comparative Analysis of Oxygen Production for Oxy-combustion Application

Banaszkiewicz, Tomasz; Chorowski, M.; Gizicki, Wojciech

doi:10.1016/j.egypro.2014.07.014

Cited by 38 publications

(21 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In this study, the use of electrical energy from Itaipu for NH 3 production was investigated. Hydrogen is produced by large size electrolyzers [21,22] (30 bar, modules of 2 MW, efficiency 75% corresponding to electrical demand of 4.7 kWh/Nm 3 H 2 ), while N 2 is obtained by an ASU [17] (electrical demand of 160 kWh/ton O 2 ); then, the reactants are compressed and sent to the Haber-Bosch section for ammonia synthesis. Electrical energy for the process is produced by the Itaipu dam.…”

Section: Methodsmentioning

confidence: 99%

“…W-ECoMP has a modular structure (more than 50 modules are implemented now), which can be easily combined by the user in order to simulate different kinds of plants (i.e., power to fuel plants, smart grids, combined cycles). One of the most important features of W-ECoMP is the possibility of performing a thermo-economic analysis at Assuming a system with a production size of 200 ton/day of NH 3 , which is a typical commercial scale [16,17], the analysis is performed in two steps: (i) mass and energy flows are calculated to define the size of the main plant components; (ii) the economic analysis is performed, calculating ammonia production costs and performing a comparison with ammonia market values.…”

Section: W-ecomp Softwarementioning

confidence: 99%

“…The main assumptions considered for the mass and energy flows calculation are reported in Table 2, based on standard values from literature and/or from the industrial market [16,17,21,22]. The resulting mass and energy flows are reported in Figure 3.…”

Section: W-ecomp Softwarementioning

confidence: 99%

“…Due to its advantage from the economic standpoint, this method is widely employed in the industrial field to separate H 2 atoms from carbon atoms in methane; on the other hand, the process results in fossil fuel consumption and in significant CO 2 emissions. The gas produced by steam reforming has to be purified, separating CO and CO 2 , before entering the Haber-Bosch reactor for ammonia synthesis, with consequent costs [16,17]. The necessary amount of N 2 is separated by air, through an air separation unit (ASU)-despite the process being well-known and the technology mature, a not-negligible amount of energy input is needed in terms of electricity, thermal energy, and fuel consumption.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Clean Hydrogen and Ammonia Synthesis in Paraguay from the Itaipu 14 GW Hydroelectric Plant

et al. 2019

View full text Add to dashboard Cite

This paper aims at investigating clean hydrogen production from the large size (14 GW) hydroelectric power plant of Itaipu, located on the border between Paraguay and Brazil, the two countries that own and manage the plant. The hydrogen, produced by a water electrolysis process, is converted into ammonia through the well-known Haber-Bosch process. Hydraulic energy is employed to produce H2 and N2, respectively, from a large-scale electrolysis system and an air separation unit. An economic feasibility analysis is performed considering the low electrical energy price in this specific scenario and that Paraguay has strong excess of renewable electrical energy but presents a low penetration of electricity. The proposal is an alternative to increase the use of electricity in the country. Different plant sizes were investigated and, for each of them, ammonia production costs were determined and considered as a term of comparison with traditional ammonia synthesis plants, where H2 is produced from methane steam reforming and then purified. The study was performed employing a software developed by the authors’ research group at the University of Genoa. Finally, an energetic, environmental, and economic comparison with the standard production method from methane is presented.

show abstract

Section: Methodsmentioning

confidence: 99%

Section: W-ecomp Softwarementioning

confidence: 99%

Section: W-ecomp Softwarementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Clean Hydrogen and Ammonia Synthesis in Paraguay from the Itaipu 14 GW Hydroelectric Plant

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The membrane separation module (membrane separator) is formed by a set of single membrane modules, connected in parallel, in series, or with any combination of these simple connections. Such constructions are required to have a compact size, which is a crucial feature in the case of widespread introduction of carbon capture installations to existing power plants and other industrial units [13,14]. The selection and type of membrane modules, dedicated to be used during the construction of a given membrane separator, depend mainly on the available expenditure and the nominal operational parameters of the unit [3,6,15].…”

Section: Introductionmentioning

confidence: 99%

Investigation of Applicability of Polyimide Membranes for Air Separation in Oxy-MILD Zero-Emission Power Plants

2019

View full text Add to dashboard Cite

Primary element of an oxy-combustion plants is ambient air separation unit. This paper presents the results of experimental research concerning the parameters of the separation of N2/O2 from ambient air, using capillary polymer membranes, potentially applicable in oxy-combustion technology, under variable operational conditions. Collected data were utilized to approximate continuous functions describing the variability of essential parameters of the air separation based on such membranes. The functions were introduced to develop a complete mathematical model of the separation unit, intended to be applied in oxy-Moderate or Intense Low Oxygen Dilution (oxy-MILD) zero-emission plants. Computational analyses were performed for three variants of the unit’s configuration: serial connection of membrane modules, unit with retentate recirculation and unit with permeate recirculation. The results of the research, in the form of sets of characteristic curves, depicting parameters of the separation process as a function of the variable operational conditions, show that crucial differences to the subsequent separation parameters (permeate purity, real selectivity coefficient, recovery coefficient) and with regard to the power consumed, were obtained. The highest parameters of the module were gained for serial connection, whereas the lowest – for permeate recirculation. The lowest energy consumption was acquired for the retentate recirculation variant.

show abstract

Avoiding CO₂ Improves Thermal Stability at the Interface of Li₇La₃Zr₂O₁₂ Electrolyte with Layered Oxide Cathodes

Kim

Waluyo

Hunt

et al. 2022

Advanced Energy Materials

View full text Add to dashboard Cite

Solid‐state batteries promise higher energy densities and better safety than Li‐ion batteries with liquid electrolytes. However, the interface between solid electrolyte and cathode is unstable at the elevated temperatures that are needed while sintering to achieve good bonding between ceramic components. Here, the hypothesis is that, the gas environment, especially the presence of CO2, is critical in determining the stability of the solid electrolyte–cathode interface. The effect of gas species on the interface is systematically probed, by a using Li7La3Zr2O12 (LLZO) solid electrolyte with a thin film LiNi0.6Mn0.2Co0.2O2 cathode as a model system to enable interface sensitivity. Detrimental phases formed at the interface and their onset conditions are identified by X‐ray absorption spectroscopy, X‐ray diffraction, and Gibbs free energy analysis. As a result, removing CO2 and minimizing H2O(g) during sintering is necessary to obtain good contact at the LLZO|cathode interface without forming secondary phases. Sintering in O2 is ideal, yielding excellent chemical stability and low interfacial resistance. Secondary phases also do not form in N2, but oxygen loss occurs at elevated temperatures. The interfacial resistance obtained upon sintering in pure O2 is comparable to the lowest values at LLZO interfaces with protective coatings, but here without the need for interface coatings.

show abstract

Comparative Analysis of Oxygen Production for Oxy-combustion Application

Cited by 38 publications

References 1 publication

Clean Hydrogen and Ammonia Synthesis in Paraguay from the Itaipu 14 GW Hydroelectric Plant

Clean Hydrogen and Ammonia Synthesis in Paraguay from the Itaipu 14 GW Hydroelectric Plant

Investigation of Applicability of Polyimide Membranes for Air Separation in Oxy-MILD Zero-Emission Power Plants

Avoiding CO₂ Improves Thermal Stability at the Interface of Li₇La₃Zr₂O₁₂ Electrolyte with Layered Oxide Cathodes

Contact Info

Product

Resources

About

Comparative Analysis of Oxygen Production for Oxy-combustion Application

Cited by 38 publications

References 1 publication

Clean Hydrogen and Ammonia Synthesis in Paraguay from the Itaipu 14 GW Hydroelectric Plant

Clean Hydrogen and Ammonia Synthesis in Paraguay from the Itaipu 14 GW Hydroelectric Plant

Investigation of Applicability of Polyimide Membranes for Air Separation in Oxy-MILD Zero-Emission Power Plants

Avoiding CO2 Improves Thermal Stability at the Interface of Li7La3Zr2O12 Electrolyte with Layered Oxide Cathodes

Contact Info

Product

Resources

About

Avoiding CO₂ Improves Thermal Stability at the Interface of Li₇La₃Zr₂O₁₂ Electrolyte with Layered Oxide Cathodes