Temat: air separation - Prolib Integro

Skocz do pozycji: 1.

Tytuł:: Technology of oxygen production in the membrane-cryogenic air separation system for a 600 MW oxy-type pulverized bed boiler
Autorzy:: Berdowska, S.
Skorek-Osikowska, A.
Tematy:: kriogeniczny rozdział powietrza
membranowy separator
produkcja tlenu
cryogenic air separation
membrane air separation
oxygen production; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/240451.pdf Link otwiera się w nowym oknie
Opis:: In this paper the results of the thermodynamic analysis of the oxy-combustion type pulverized bed boiler integrated with a hybrid, membrane-cryogenic oxygen separation installation are presented. For the calculations a 600 MW boiler with live steam parameters at 31.1 MPa /654.9[degrees]C and reheated steam at 6.15 MPa/672.4[degrees]C was chosen. In this paper the hybrid membrane-cryogenic technology as oxygen production unit for pulverized bed boiler was proposed. Such an installation consists of a membrane module and two cryogenic distillation columns. Models of these installations were built in the Aspen software. The energy intensity of the oxygen production process in the hybrid system was compared with the cryogenic technology. The analysis of the influence of membrane surface area on the energy intensity of the process of air separation as well as the influence of oxygen concentration at the inlet to the cryogenic installation on the energy intensity of a hybrid unit was performed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Mathematical models of the air separation through polymer membranes at magnetic field
Autorzy:: Strzelewicz, A.
Grzywna, Z. J.
Tematy:: diffusion
membrane
time lags
gas mixtures
air separation; Pokaż więcej
Wydawca:: Politechnika Bydgoska im. Jana i Jędrzeja Śniadeckich. Wydział Technologii i Inżynierii Chemicznej
Powiązania:: https://bibliotekanauki.pl/articles/346951.pdf Link otwiera się w nowym oknie
Opis:: This paper is addressed to the membrane air separation i.e. the gas mixture of quite similar gases in many respects, except one: oxygen is paramagnetic whereas nitrogen is diamagnetic. This fact forms the basis for their separation. The numerical studies and theoretical predictions concerning the air membrane separation in the presence of a magnetic field are discussed. Some experimental data concerning the „magnetic membranes” i.e. ethylcellulose membranes with neodymium powder, are also presented.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: The influence of selected parameters on the efficiency and economic charactersistics of the oxy-type coal unit with a membrane-cryogenic oxygen separator
Autorzy:: Kotowicz, J.
Berdowska, S.
Tematy:: oxygen production
membrane air separation
produkcja tlenu
membranowy separator; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/240290.pdf Link otwiera się w nowym oknie
Opis:: In this paper a 600 MW oxy-type coal unit with a pulverized bed boiler and a membrane-cryogenic oxygen separator and carbon capture installation was analyzed. A membrane-cryogenic oxygen separation installation consists of a membrane module and two cryogenic distillation columns. In this system oxygen is produced with the purity equal to 95%. Installation of carbon capture was based on the physical separation method and allows to reduce the CO₂ emission by 90%. In this work the influence of the main parameter of the membrane process – the selectivity coefficient, on the efficiency of the coal unit was presented. The economic analysis with the use of the break-even point method was carried out. The economic calculations were realized in view of the break-even price of electricity depending on a coal unit availability.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Teoreticheskoe obosnovanie kachestvennykh pokazatelejj processa pnevmoseparacii dlja mnogourovnevogo vvedenija zerna
The theoretical justification of air separation process quality factors for the multilevel grain introduction
Autorzy:: Nesterenko, A.
Leschenko, S.
Petrenko, D.
Bogatyrev, D.
Kislun, O.
Tematy:: air separation
feeder operator
grain mixture
grain introduction
air flow resistance
separation process
theoretical analysis; Pokaż więcej
Wydawca:: Komisja Motoryzacji i Energetyki Rolnictwa
Powiązania:: https://bibliotekanauki.pl/articles/77122.pdf Link otwiera się w nowym oknie
Opis:: The article is devoted to the theoretical analysis of the work of the aspirating channel with the feeder for the multilevel grain mixture introduction for the purpose of efficiency improving and air flow drag reduction. There are the formulas suggested for the definition of separation process quality factors and their connection with the main separator characteristics.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Recovery of base and precious metals from scrap TV boards using zig-zag air separator
Autorzy:: Yazici, Ersin Yener
Celep, Oktay
Ibrahim, Boulama Omar Yacine Lawan
Deveci, Haci
Tematy:: WEEE
scrap TV boards
recycling
metal
copper
silver
air separation; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/24148637.pdf Link otwiera się w nowym oknie
Opis:: Waste of Electrical and Electronic Equipments (WEEE) is one of the fastest growing waste streams in the world. The treatment of WEEE with high content of precious metals (Au in particular) has received the most attention due to their high economic potential. The development of simple, environmentally friendly and cost-effective methods for the recovery of metals from “low-value” WEEE (e.g., <100 g/t Au) is important from the circular economy perspective. In this study, the separation of base (Cu) and precious (Ag) metals from scrap TV boards (STVBs) by using a zig-zag air separator was investigated. Size-reduced scrap STVBs (-1 mm) were subjected to separation tests after the removal of the fine fraction (-0.1 mm). The sized scrap material (-1 +0.1 mm) was determined to have a metal content of 15.4% Cu, 47 g/t Ag and 0.05% Fe, with no gold. In the air separation tests, the effect of air flow rate (4-16 m/s) on the recovery of metals was studied. Increasing the air flow rate resulted in low metal recoveries with concurrent high metal grades in the concentrate. Separation efficiency (%) calculations showed that the most efficient separation is obtained at the highest air flow rate of 16 m/s. At this flow rate, 15.4% of the material was recovered in the concentrate which contains 62.3% Cu and 198 g/t Ag with recoveries of 63.3% Cu and 73.9% Ag. The findings indicated that zig-zag air separators can be used to obtain a metal-rich fraction under suitable conditions of the flow regime.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Air Separation Units (ASUs) Simulation Using Aspen Hysys® at Oxinor I of Air Liquid Chile S.A Plant
Autorzy:: Leiva, C.A
Poblete, D.A.
Aguilera, T.L.
Acuña, C.A.
Quintero, F.J.
Tematy:: Simulation
Oxygen plant
Aspen Hysys
Air separation units (ASUs)
Air Liquide S.A.; Pokaż więcej
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Powiązania:: https://bibliotekanauki.pl/articles/778527.pdf Link otwiera się w nowym oknie
Opis:: The method used to extract copper from its ores depends on the nature of the ore. The main process currently to separate copper from sulphide ores is the smelting process. The concentrated ore is heated strongly with silicon dioxide (silica), calcium carbonate and oxygen enriched air in a furnace or series of furnaces which is carried out using the injection of the air for oxidation the Fe and Si present in the raw material. Oxygen can be produced using several different methods. One of these methods is Air separation process, which separates atmospheric air into its primary components, typically nitrogen and oxygen, and sometimes also argon and other rare inert gases by cryogenic distillation. In this paper, simulation of air separation units (ASUs) was studied using Aspen Hysys^®. The obtained simulation and model was validated with the operational data from the Oxinor I of Air Liquide S.A Plant. The ASU was divided into subsystems to perform the simulations. Each subsystem was validated separately and later on integrated into a single simulation. An absolute error of 1% and 1.5% was achieved between the simulated and observed the process variables(s). This indicated that Aspen Hysys^® has the thermodynamic packages and required tools to perform simulations in cryogenic processes at industrial scale.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Technical and economic aspects of oxygen separation for oxy-fuel purposes
Autorzy:: Chorowski, M.
Gizicki, W.
Tematy:: air separation
oxy-combustion
energy storage
separacja powietrza
spalanie w tlenie
magazynowanie energii; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/240161.pdf Link otwiera się w nowym oknie
Opis:: Oxy combustion is the most promising technology for carbon dioxide, originated from thermal power plants, capture and storage. The oxygen in sufficient quantities can be separated from air in cryogenic installations. Even the state-of-art air separation units are characterized by high energy demands decreasing net efficiency of thermal power plant by at least 7%. This efficiency decrease can be mitigated by the use of waste nitrogen, e.g., as the medium for lignite drying. It is also possible to store energy in liquefied gases and recover it by liquid pressurization, warm-up to ambient temperature and expansion. Exergetic efficiency of the proposed energy accumulator may reach 85%.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: Analysis of the pneumatic separation process of agricultural materials
Autorzy:: Panasiewicz, M.
Tematy:: aerodynamic property
air separation
crushed seed
separation process
protein
moisture content
agricultural material
lupin
pneumatic separation process
seed; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Instytut Agrofizyki PAN
Powiązania:: https://bibliotekanauki.pl/articles/24769.pdf Link otwiera się w nowym oknie
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Performance of cryogenic oxygen production unit with exhaust gas bleed for sewage sludge gasification and different oxygen purities
Autorzy:: Kaszuba, Maja
Ziółkowski, Paweł
Mikielewicz, Dariusz
Tematy:: thermodynamic analysis
oxy-combustion of syngas
BECCS
cryogenic air separation
penalty production
oxygen production; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czasopisma i Monografie PAN
Powiązania:: https://bibliotekanauki.pl/articles/27312208.pdf Link otwiera się w nowym oknie
Opis:: The paper presents a thermodynamic analysis of the integration of a cryogenic air separation unit into a negative CO2 emission gas power plant. The power cycle utilizes sewage sludge as fuel so this system fits into the innovative idea of bioenergy with carbon capture and storage. A cryogenic air separation unit integrated with the power plant was simulated in professional plant engineering and thermodynamic process analysis software. Two cases of the thermodynamic cycle have been studied, namely with the exhaust bleed for fuel treatment and without it. The results of calculations indicate that the net efficiencies of the negative CO2 emission gas power plant reach 27.05% (combustion in 95.0% pure oxygen) and 24.57% (combustion in 99.5% pure oxygen) with the bleed. The efficiencies of the cycle without the bleed are 29.26% and 27.0% for combustion in 95.0% pure oxygen and 99.5% pure oxygen, respectively. For the mentioned cycle, the calculated energy penalty of oxygen production was 0.235 MWh/kgO2 for the lower purity value. However, for higher purity namely 99.5%, the energy penalty of oxygen production for the thermodynamic cycle including the bleed and excluding the bleed was indicated 0.346 and 0.347 MWh/kgO2, respectively. Additionally, the analysis of the oxygen purity impact on the carbon dioxide purity at the end of the carbon capture and storage installation shows that for the case with the bleed, CO2 purities are 93.8% and 97.6%, and excluding the bleed they are 93.8% and 97.8%, for the mentioned oxygen purities respectively. Insertion of the cryogenic oxygen production installation is required as the considered gas power plant uses oxy-combustion to facilitate carbon capture and storage method.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Analysis of the efficiency of the unit based on circulating fluidized bed boiler integrated with three-end high-temperature membrane for air separation
Analiza efektywności układu kotła cyrkulacyjnego typu oxy z membraną wysokotemperaturową typu three-end do separacji powietrza
Autorzy:: Kotowicz, J.
Balicki, A.
Tematy:: kocioł fluidalny
membrana typu three-end
separacja powietrza
fluidized boiler
three-end membrane
air separation; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/172915.pdf Link otwiera się w nowym oknie
Opis:: W artykule analizie poddano kocioł z cyrkulacyjnym złożem fluidalnym. Do spalania węgla brunatnego w kotle użyto tlenu wytworzonego w wysokotemperaturowej membranie typu three-end. Pokazano sposób określenia powierzchni membran oraz energochłonności procesu membranowej separacji powietrza. Sprawność termiczną kotła, energochłonność membranowej separacji powietrza i powierzchnię modułu membranowego wyznaczono w funkcji odzysku tlenu w membranie. Zaproponowano wykorzystanie azotu z instalacji separacji powietrza do suszenia węgla. Dla takiego wariantu również wyznaczono charakterystyki układu. Stwierdzono, że przy wykorzystaniu azotu do suszenia sprawności termicznej kotła rośnie z 76% do 87%, przy wzroście stopnia odzysku tlenu od 0,45 do 0,9, i jest wyższa odpowiednio od 12% do 6% w porównaniu do układu bez suszenia. W zaproponowanym układzie separacji powietrza powierzchnia modułu membranowego zawiera się w przedziale 76,5-95,0 tys. m².
In this paper boiler with circulating fluidized bed was analyzed. For the combustion of lignite in the boiler oxygen produced in the three-end high-temperature membrane was used. Paper shows a method of determining the surface of the membranes and energy consumption of the air separation process. Boiler thermal efficiency, energy consumption of the process and air separation membrane module surface was determined as a function of oxygen recovery in the membrane. Nitrogen from the air separation unit was proposed to be used for drying lignite. For this variant characteristics of the system were determined. It was found that the thermal efficiency of the boiler in case where nitrogen was used for lignite drying increased from 76% to 87% with increasing value of oxygen recovery ratio from 0.45 to 0.9 and is higher, respectively, from 12% to 6% in comparison to the system without drying. In the proposed air separation unit required membrane surface is in the range 76500-95000 m².
Dostawca treści:: Biblioteka Nauki

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