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Wyszukujesz frazę "recovery energy" wg kryterium: Temat


Tytuł:
Alignment of the heat recovery potential with the local area heat demand for selected industrial entities in the city of Gliwice
Autorzy:
Banasik, Aleksandra
Kostowski, Wojciech
Powiązania:
https://bibliotekanauki.pl/articles/41185413.pdf
Data publikacji:
2023
Wydawca:
Politechnika Warszawska, Instytut Techniki Cieplnej
Tematy:
waste heat
heat recovery
district heating system
residential sector
energy management
strata ciepła
odzysk ciepła
system ciepłowniczy
sektor mieszkaniowy
zarządzanie energią
Opis:
Waste heat plays a significant role in obtaining the 4th and 5th generation of District Heating (DH) System in cities. This article presents the possibilities of integrating selected waste heat emitters into DH, with the objective of meeting the demand for heat for the selected residential area (approx. 4000 inhabitants) in the city of Gliwice (180 000 inhabitants). The total heating demand of the studied area was estimated at 19 800 GJ including both space heating and domestic hot water. The maximum thermal power was estimated at approx. 2.45 MW. The demand was calculated on the basis of registered metering values for individual buildings which were processed and summarized due to the lack of collective meters for the district. A detailed data classification, correction and completion procedure was elaborated to deal with non-uniform and low-quality data registration. Two industrial objects with waste heat generation were examined to be integrated with the local DH network. The waste heat generation potential equals 9.0 MW for plant #1 and 0.9 MW for plant #2. Apart from the constant generation declared by the industrial entities, realistic profiles including possible shaft-work and maintenance periods were created. It has been shown that the total heat demand for selected residential areas can be covered by integrating waste heat into the current DH network. Depending on the waste heat generation profile, the local area heat demand can be covered entirely or to a large degree (coverage factor ranges from 72 to 100%). The waste heat utilization factor ranges from 6.3 to 8.3%. To manage the remaining waste heat potential, it is required to build additional district heating pipelines and nodes connecting to the existing network to receive an additional 7.45 MW thermal power. The potential of waste heat recovery is significant at the scale of a medium sized city: integrating two large industrial emitters allows up to 13% decarbonization of heats production in the local district heating plan.
Źródło:
Journal of Power Technologies; 2023, 103, 2; 104-117
1425-1353
Pojawia się w:
Journal of Power Technologies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Integrated models of the combination of EU grant funding and private funding in the energy sector of Ukraine based on Public-Private Partnership
Zintegrowane modele łączenia dofinansowania unijnego i prywatnego w sektorze energetycznym Ukrainy w oparciu o partnerstwo publiczno-prywatne
Autorzy:
Kuzior, Aleksandra
Liashenko, Viacheslav
Petrova, Iryna
Serdiuk, Oleksandr
Powiązania:
https://bibliotekanauki.pl/articles/27312526.pdf
Data publikacji:
2023
Wydawca:
Polska Akademia Nauk. Instytut Gospodarki Surowcami Mineralnymi i Energią PAN
Tematy:
VOSviewer
public-private partnership
post-war recovery Ukraine
energy infrastructure
energy sector
partnerstwo publiczno-prywatne
powojenna odbudowa Ukrainy
infrastruktura energetyczna
sektor energetyczny
Opis:
The post-war reconstruction of the energy sector of Ukraine is a critical issue that requires significant investment in both infrastructure and modernization. However, the limited financing of the public sector is a problem that needs to be addressed. A combination of European Union (EU) grant funding and private funding through public-private partnerships (PPPs) has been suggested as a potential solution to this problem. The relevance of this topic lies in the potential of PPPs to attract resources and experience from both the public and private sectors. This can lead to a more efficient use of resources and can help solve the problems associated with limited public sector funding. In addition, PPPs can provide a framework for sharing risks between the public and private sectors and can help mobilize private sector resources and expertise, which can be critical in post-war recon struction efforts. In addition, a combination of EU grant funding and private funding through PPPs can contribute to broader economic development by promoting investment in the energy sector. This can help stimulate economic growth, create jobs and improve energy security, which is critical for the long-term sustainability of Ukraine’s energy sector. Thus, the topic of combined models of uniting EU grant funding and private funding based on public-private partnership for the post-war reconstruction of the energy sector of Ukraine is extremely relevant for solving problems related to limited public sector funding, attracting resources and experience from both public and private sectors as well as promoting the broader economic development of Ukraine.
Powojenna odbudowa sektora energetycznego Ukrainy jest kwestią krytyczną, wymagającą znacznych inwestycji w infrastrukturę i modernizację. Problemem wymagającym rozwiązania jest jednak ograniczone finansowanie sektora publicznego. Jako potencjalne rozwiązanie tego problemu zaproponowano połączenie dotacji UE i finansowania prywatnego w ramach partnerstwa publiczno-prywatnego (PPP). Istotność tego tematu polega na potencjale PPP w zakresie przyciągania zasobów i doświadczenia zarówno z sektora publicznego, jak i prywatnego. Może to prowadzić do bardziej efektywnego wykorzystania zasobów i pomóc w rozwiązaniu problemów związanych z ograniczonym finansowaniem sektora publicznego. Ponadto PPP mogą zapewnić ramy podziału ryzyka między sektor publiczny i prywatny oraz mogą pomóc w mobilizacji zasobów i wiedzy fachowej sektora prywatnego, co może mieć kluczowe znaczenie w powojennych wysiłkach na rzecz odbudowy. Ponadto połączenie dotacji UE i finansowania prywatnego za pośrednictwem PPP może przyczynić się do szerszego rozwoju gospodarczego poprzez promowanie inwestycji w sektorze energetycznym. Może to pomóc w stymulowaniu wzrostu gospodarczego, tworzeniu miejsc pracy i poprawie bezpieczeństwa energetycznego, co ma kluczowe znaczenie dla długoterminowej stabilności ukraińskiego sektora energetycznego. Zatem temat połączonych modeli łączenia dofinansowania unijnego i prywatnego w oparciu o partnerstwo publiczno-prywatne na rzecz powojennej odbudowy sektora energetycznego Ukrainy jest niezwykle istotny dla rozwiązywania problemów związanych z ograniczonym finansowaniem sektora publicznego, przyciąganiem środków i doświadczeń zarówno z sektora publicznego, jak i prywatnego, a także promowanie szerszego rozwoju gospodarczego Ukrainy.
Źródło:
Polityka Energetyczna; 2023, 26, 4; 165--194
1429-6675
Pojawia się w:
Polityka Energetyczna
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modernization of the VSVEM-1140 electro-mechatronic system for testing theasynchronous motors
Autorzy:
Beshta, Oleksandr, senior
Khudolii, Serhii
Djur, Roman
Peltek, Illia
Powiązania:
https://bibliotekanauki.pl/articles/27324352.pdf
Data publikacji:
2023
Wydawca:
Instytut Techniki Górniczej KOMAG
Tematy:
testing and charging stations
high-voltage alternating current electric machines
energy recovery in braking modes
electro-mechatronic system
thermal diagnostics of electric machines
system elektromechaniczny
maszyny elektryczne
diagnostyka
Opis:
The article is devoted to the description of practical experience in testing the alternating current electric machines. The results of combining thecapabilities of digital systems for collecting and processing information with a powerful electromechanical system are presented. Itis the combination of two systems of different purposes that enables creating the state-of-the art diagnostic installations combined into one electro-mechatronic system. Practical results of electric machine tests contain clear explanations of fundamental principles and provide acomprehensive assessment of the conditionof electric machines. They use methods of direct charging the electric machines with the possibility of recuperation of electric energy during tests. Thermal state of electrical machine nodes is monitoredusing the thermal forecasting technologies. Both the methods for various types of tests and means for their implementation are described in detail. This article is intended for engineers involved in designing, manufacturing and testing the electric machines.
Źródło:
Mining Machines; 2023, 41, 4; 240--247
2719-3306
Pojawia się w:
Mining Machines
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analiza i usprawnienie logistycznego systemu magazynowego poprzez zastosowanie składowania typowych jednostek paletowych w regale z odzyskiem energii
Analysis and improvement of the logistic storage system by means of storing typical pallet units in a rack with energy recovery
Autorzy:
Goleń, Krystian
Powiązania:
https://bibliotekanauki.pl/articles/24200455.pdf
Data publikacji:
2022
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
odzysk energii
układ odzysku energii
regał przepływowy
regał grawitacyjny
przemiennik częstotliwości
składowanie
energy recovery
energy recovery system
flow rack
gravity flow rack
frequency converter
storage
Opis:
W artykule omówiono zagadnienia związane z zastosowaniem regału przepływowego z odzyskiem energii w procesie składowania typowych jednostek paletowych. Opracowano założenia układu, model obliczeniowy i przeprowadzono analizę przemian energii jednostki ładunkowej podczas procesu składowania. Na podstawie otrzymanych wyników zaproponowano kompletny moduł układu pozwalający na odzyskanie i ponowne wykorzystanie części energii jednostki ładunkowej. Dla zaproponowanego rozwiązania przeprowadzono analizę jego odpowiedniego umiejscowienia. Oszacowano także sprawność zaproponowanego układu i przeanalizowano jego opłacalność ekonomiczną.
The paper describes the possibility of recovering a part of a pallet’s kinetic energy during storage on a flow rack. In order to develop the solution, it was necessary to make assumptions, create a computational model and analyse energy transformations during the storage process. The proposed solution, based on the results of the model and analysis, is able to recover energy from flow racks and transform it into a usable form. The paper analyses an appropriate localisation for the energy recovery system, describes its efficiency and defines its cost effectiveness.
Źródło:
Journal of TransLogistics; 2022, 8, 1; 41-60
2450-5870
Pojawia się w:
Journal of TransLogistics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Energy recovery from waste as an essential part of a sustainable economy
Autorzy:
Malec, Marta
Powiązania:
https://bibliotekanauki.pl/articles/31342801.pdf
Data publikacji:
2022
Wydawca:
Instytut Polityki Energetycznej im. Ignacego Łukasiewicza
Tematy:
waste management
recycling
energy recovery
renewable energy sources
sustainability
Opis:
The article presents an analysis of benefits of the energy recovery from waste. Presented a look at energy recovery from waste as part of a modern and diversified national energy policy. Energy recovery from waste is an essential link in closing the model of a sustainable closed-cycle economy. The paper presents the basic legal regulations on energy recovery from waste in Poland and the European Union and discusses the waste hierarchy model, according to which energy recovery from waste is placed behind material recycling. The technical basis of the energy recovery process in waste incineration plants is presented, as well as the possibility of classifying part of the energy recovered from waste as energy from a renewable source. The importance of cogeneration, regarded as the most efficient way of producing energy from waste, is emphasised.
Źródło:
Energy Policy Studies; 2022, 3 (11); 41-52
2545-0859
Pojawia się w:
Energy Policy Studies
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Modeling and energy recovery from a system with two pseudo-levitating magnets
Autorzy:
Mitura, Andrzej
Kecik, Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2173689.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
energy recovery
pseudo-levitating magnets
nonlinear dynamics
experimental research
odzyskiwanie energii
magnes pseudo-lewitujący
dynamika nieliniowa
badanie eksperymentalne
Opis:
In this paper, a model of an electromagnetic system with two levitating magnets is presented. Modeling was performed using the results of experiments. The data obtained make it possible to fit the magnetic forces between two magnets using a 5th order polynomial. The time series show that dry friction constitutes an important part of damping forces. The differential equations of motion consider strong nonlinearities of magnetic and damping forces. These terms cause the nonlinear hardening effect. The energy recovered by magnetic induction is dissipated in the resistors. Numerical simulations show that resistance has an impact on magnet dynamics and energy recovery. From the resonance characteristics obtained, optimal resistance is determined when energy recovery is the highest.
Źródło:
Bulletin of the Polish Academy of Sciences. Technical Sciences; 2022, 70, 4; art. no. e141721
0239-7528
Pojawia się w:
Bulletin of the Polish Academy of Sciences. Technical Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Global Trends in the Development of Battery-Powered Underground Mining Machines
Autorzy:
Bołoz, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/2064588.pdf
Data publikacji:
2021
Wydawca:
STE GROUP
Tematy:
self-propelled mining machines
battery power
battery drive
underground mining
braking energy recovery
battery replacement
Opis:
The growing requirements and needs of users as well as a strong emphasis on pro-ecological solutions cause an increasing interest in battery-powered electric mining machines. Internal combustion machines consume oxygen, generate noise, fumes and heat, which affects work in underground mines, and minimizing these factors is expensive. Battery solutions allow achieving the same operational parameters of machines with significantly higher safety, comfort and work culture. The problem, however, is their range or working time. The article presents global trends in the development of battery-operated machines for underground mining. Various machines in battery-powered versions have been presented. The applied solutions have been discussed, especially in the field of battery replacement or recharging and braking energy recovery. Manufacturers around the world offer more and more battery-powered machines. Some producers are announcing complete replacement of combustion solutions with electric ones within the next few years. There are also hydrogen machines on the horizon, which will probably be the next step on the road to a zero-emission industry.
Źródło:
Multidisciplinary Aspects of Production Engineering; 2021, 4, 1; 178--189
2545-2827
Pojawia się w:
Multidisciplinary Aspects of Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Measuring Regenerative Braking Electricity Generated by the City Bus with Internal Combustion Engine
Autorzy:
Wendeker, Mirosław
Gęca, Michał Jan
Grabowski, Łukasz
Barański, Grzegorz
Powiązania:
https://bibliotekanauki.pl/articles/2123295.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
energy recovery
electricity consumption
city bus
Opis:
Engine braking, just when the vehicle consumes no fuel, is an important component of the energy balance. In such states, the bus loses its cumulated kinetic and potential energies but alternators recover a portion of these energies into electricity. Simultaneously, electricity consumption in the diesel-engine city bus is a key component of the overall energy balance. A total energy output of receivers can be more than 4 kW. This paper presents the research results on performance of a serial bus driving varied urban routes. The recorded and investigated parameters include a total amount fuel and electricity consumed and an amount of electricity generated. Engine braking states were calculated with a created algorithm. On average, 17% of electricity was generated by bus engine braking. The research results and investigation refer to the entire year.
Źródło:
Advances in Science and Technology. Research Journal; 2021, 15, 3; 215--223
2299-8624
Pojawia się w:
Advances in Science and Technology. Research Journal
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
New Design of a Boost Drive Circuit with an Energy Recovery Function for the Piezoelectric Jacquard Needle
Projekt samowzmacniającego obwodu zasilania z funkcją odzyskiwania energii dla piezoelektrycznej igły żakardowej
Autorzy:
Xia, Wen
Ren, Wen
Lai, Sencai
Powiązania:
https://bibliotekanauki.pl/articles/1419849.pdf
Data publikacji:
2021
Wydawca:
Sieć Badawcza Łukasiewicz - Instytut Biopolimerów i Włókien Chemicznych
Tematy:
warp knitting machine
self-boost power supply design
energy recovery
maszyna dziewiarska
obwód zasilania
odzysk energii
Opis:
Aiming at the technical bottlenecks existing in the current warp knitting machine control system such as jacquard drive circuit, the design method of self-boosting power supply circuit integrated with jacquard driver is proposed for the embedded warp knitting machine jacquard control system for miniaturization design. The voltage boost circuit designed can boost the low voltage from the input of the working power supply to the high voltage for the output to drive the oscillation of the piezoelectric ceramic jacquard needles. Since the circuit adopts energy storage inductance instead of current-limiting resistor to optimize the driving circuit, it not only limits the forward charging current of the piezoelectric ceramic, but also effectively realize the energy recovery function. The effectiveness of the design method is verified by simulation.
Mając na celu techniczne wąskie gardła występujące w obecnym systemie sterowania maszyną do tkania osnowowego, takie jak obwód napędu żakardowego, zaproponowano metodę projektowania samowzmacniającego obwodu zasilania zintegrowanego ze sterownikiem żakardowym dla wbudowanego systemu sterowania żakardowego maszyny. Zaprojektowany obwód zwiększający napięcie może zwiększać niskie napięcie z wejścia zasilacza roboczego do wysokiego napięcia na wyjściu, aby napędzać oscylacje piezoelektrycznych ceramicznych igieł żakardowych. Skuteczność metody projektowania została zweryfikowana za pomocą symulacji.
Źródło:
Fibres & Textiles in Eastern Europe; 2021, 1 (145); 86-91
1230-3666
2300-7354
Pojawia się w:
Fibres & Textiles in Eastern Europe
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Production and use of waste-derived fuels in Poland: current status and perspectives
Autorzy:
Bień, Jurand
Powiązania:
https://bibliotekanauki.pl/articles/1839563.pdf
Data publikacji:
2021
Wydawca:
Stowarzyszenie Menedżerów Jakości i Produkcji
Tematy:
paliwa alternatywne
odrzucone paliwa pochodne OPB
produkcja RDF
odzyskiwanie energii
waste-derived fuels
refused derived fuels RDF
RDF production
energy recovery
Opis:
In the paper issues related to the production and utilisation of waste-derived fuel (alternative fuel) in Poland are presented. Alternative fuel comes from dry residue of waste, mostly municipal, and is treated as a waste. In European Waste Catalogue waste-derived fuel is marked with 191210 code despite their municipal, industrial or mixed origin. The production and utilisation of alternative fuel were analysed with the data from sixteen polish voivodships’ annual reports. The total amount of waste-derived fuel produced in Poland exceeds 3 million tonnes annually. It means there is no balance between the amount of production and possibility of energy recovery in Poland. In 2018 only 1,54 million tons was recovered in R1 recovery process which is only half of the waste-derived fuel produced. In addition, the entire amount of fuel is used in the cement industry. In 2018 in the cement industry 1,46 millions tons of alternative fuel was used. It is estimated that the potential use of alternative fuel by cement plants in Poland is about 1.5-1.8 million tonnes. This means that greater use of alternative fuel in the cement sector is significantly limited. The difference between in the amount of fuel produced and the amount of fuel used for energy recovery in 2018 is around 1.67 million tons. This situation has a significant impact on the economy of waste management in the field of combustible waste production.
Źródło:
Production Engineering Archives; 2021, 27, 1; 36-41
2353-5156
2353-7779
Pojawia się w:
Production Engineering Archives
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical analysis of LNG regasifier supplementing gas turbine cycle
Autorzy:
Szczygieł, Ireneusz
Rutczyk, Bartłomiej
Powiązania:
https://bibliotekanauki.pl/articles/1955037.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
LNG
gas turbine
cryogenic exergy
energy recovery
Opis:
Liquefied natural gas (LNG) is transported by the sea-ships with relatively low pressure (0.13–0.14 MPa) and very low temperature (about 100 K) in cryo-containers. Liquid phase, and the low temperature of the medium is connected with its high exergy. LNG receives this exergy during the liquefaction and is related with energy consumption in this process. When the LNG is evaporated in atmospheric regasifiers (what takes place in many on-shore terminals as well as in local regasifier stations) the cryogenic exergy is totally lost. fortunately, there are a lot of installations dedicated for exergy recovery during LNG regasification. These are mainly used for the production of electricity, but there are also rare examples of utilization of the LNG cryogenic exergy for other tasks, for example it is utilized in the fruit lyophilization process. In the paper installations based on the Brayton cycle gas turbine are investigated, in the form of systems with inlet air cooling, liquid phase injection, exhaust gas based LNG evaporation and mirror gas turbine systems. The mirror gas turbine system are found most exegetically effective, while the exhaust gas heated systems the most practical in terms of own LNG consumption.
Źródło:
Archives of Thermodynamics; 2021, 42, 4; 47-67
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of Stirling engine type alpha powered by the recovery energy on vessels
Autorzy:
Kropiwnicki, Jacek
Powiązania:
https://bibliotekanauki.pl/articles/260612.pdf
Data publikacji:
2020
Wydawca:
Politechnika Gdańska. Wydział Inżynierii Mechanicznej i Okrętownictwa
Tematy:
Stirling engine
recovery energy
efficiency
regenerator
Opis:
The Stirling engine is a device in which thermal energy is transformed into mechanical energy without any contact between the heat carrier and the working gas enclosed in the engine. The mentioned feature makes this type of engine very attractive for the use of the recovery energy taken from other heat devices. One of the potential applications of Stirling engines is the use of thermal energy generated in the ship’s engine room for producing electricity. The work presents the concept of the Stirling engine type alpha powered by the recovery energy. The model of Stirling engine developed in this work allows a quantitative assessment of the impact of the design features of the engine, primarily the heat exchange surfaces and the volume of control spaces, on the achieved efficiency and power of the engine. Using an iterative procedure, Stirling engine simulation tests were carried out taking into account the variable structural features of the system. The influence of the size of the heater and the cooler, as well as the effectiveness of the regenerator and the temperature of the heat source on the efficiency and power produced by the Stirling engine have been presented.
Źródło:
Polish Maritime Research; 2020, 1; 96-106
1233-2585
Pojawia się w:
Polish Maritime Research
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of flax fibers addition on the mechanical properties and biodegradability of biocomposites based on thermoplastic starch
Autorzy:
Borowski, Gabriel
Klepka, Tomasz
Pawłowska, Małgorzata
Lavagnolo, Maria Cristina
Oniszczuk, Tomasz
Wójtowicz, Agnieszka
Combrzyński, Maciej
Powiązania:
https://bibliotekanauki.pl/articles/204728.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
biocomposite
flax fiber
maize starch
extrusion-cooking
biodegradation
energy recovery
Opis:
The research was intended to develop a biocomposite as an alternative biodegradable material, for the production of, e.g., disposable utensils. The author’s tested thermoplastic maize starch, both without additives and with the addition of crumbled flax fiber in the share of 10, 20 and 30 wt%. The plasticizer added was technical glycerin and the samples were produced by a single-screw extruder. The mechanical strength tests were performed, including the impact tensile test and three-point bending flexural test. Afterwards, the samples were tested for biodegradability under anaerobic conditions. The methane fermentation process was carried in a laboratory bioreactor under thermophilic conditions with constant mixing of the batch. All samples proved to be highly susceptible to biodegradation during the experiment, regardless of the flax fiber share. The biogas potential was about 600 ml·g-1, and the methane concentration in biogas ranged from 66.8 to 69.6%. It was found, that the biocomposites can be almost completely utilized in bioreactors during the biodegradation process. The energy recovery in the decomposition process with the generation of significant amount of methane constitutes an additional benefit.
Źródło:
Archives of Environmental Protection; 2020, 46, 2; 74-82
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Environmental and Legal Conditions of Rare Earth Elements
Autorzy:
Spasowska-Czarny, Hanna
Powiązania:
https://bibliotekanauki.pl/articles/618731.pdf
Data publikacji:
2020
Wydawca:
Uniwersytet Marii Curie-Skłodowskiej. Wydawnictwo Uniwersytetu Marii Curie-Skłodowskiej
Tematy:
rare earth elements (REEs)
critical raw materials
recovery
recycling
low-carbon economy
energy-efficient technology
metale ziem rzadkich
surowce krytyczne
odzysk
recykling
gospodarka niskoemisyjna
technologia energooszczędna
Opis:
To run an efficient and well developed economy, it is necessary to procure materials and elements belonging to four main groups, that is energy resources, organic resources, water and mineral resources. Non-energy resources, including critical raw materials, have limited resource base, significant dispersal of minerals and very limited possible substitution. Those resources include rare earth elements, which set directions for contemporary dynamic development of many industries. With the development of innovative technologies, the demand for essential components has grown. The use of rare earth elements to develop energy-efficient technologies is very promising, especially in wind generators and hybrid cars.
Do wydajnego funkcjonowania i rozwoju każdej gospodarki niezbędne są surowce należące do czterech głównych grup. Są to surowce energetyczne, surowce organiczne, woda i surowce mineralne. Surowce nieenergetyczne (w tym tzw. surowce krytyczne) cechują się ograniczoną bazą surowcową i znacznym rozproszeniem minerałów oraz bardzo ograniczonymi możliwościami substytucji. Do tych surowców zaliczane są pierwiastki ziem rzadkich, które wyznaczają kierunki nowoczesnego, dynamicznego rozwoju różnych gałęzi przemysłu. Wraz z rozwojem nowoczesnych technologii wzrosło zapotrzebowanie na komponenty niezbędne do ich rozwijania i wytwarzania. Bardzo obiecujące jest wykorzystanie metali ziem rzadkich w technologiach związanych z rozwojem gospodarki niskoemisyjnej, zwłaszcza w turbinach wiatrowych i samochodach hybrydowych.
Źródło:
Studia Iuridica Lublinensia; 2020, 29, 1
1731-6375
Pojawia się w:
Studia Iuridica Lublinensia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of alkali processing for the recycling of rare earth values from spent fluorescent lamps
Autorzy:
Shukla, Neha
Tanvar, Himanshu
Dhawan, Nikhil
Powiązania:
https://bibliotekanauki.pl/articles/1449193.pdf
Data publikacji:
2020
Wydawca:
Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Tematy:
fluorescent lamps
rare earth elements
activation energy
recovery
cerium
terbium
Opis:
Phosphor samples collected after crushing and sieving of discarded fluorescent lamps comprise approximately 31 % rare earth elements in the form of $Y_{1.90}Eu_{0.10}O_3$, $Al11Ce_{0.67}MgO_{19}Tb_{0.33}$, and $Al_{10.09}Ba_{0.96}Mg_{0.91}O_{17}$: $Eu^{2+}$ phase. Direct leaching and mechanical activation assisted leaching are incapable of recovering $Ce$, $Tb$ values from the $Al_{11}Ce_{0.67}MgO_{19}Tb_{0.33}$ phase. Heat treatment with $NaOH$ was found successful for dissociation of $Ce$, $Tb$ phase via substitution of rare-earth ion by $Na^+$ ion to form rare earth oxide and water-soluble $NaAlO_2$. $Y$, $Eu$, $Ce$, and $Tb$ values were recovered from heattreated mass in a two-step leaching process followed by recovery from the leach solution by oxalic acid precipitation. Over 95 % extraction rate was attained after heat treatment at 400 °C with 150 wt-% $NaOH$ for 1 h. It was found that $Y$, $Eu$ containing phase does not take part in the heat treatment process whereas the $Ce$, $Tb$ phase undergoes a solid-state chemical reaction with $NaOH$ via product layer diffusion model with 41.5 kJ/mol activation energy. Approximately 15 g mixed oxide (purity >95 %) of $Y$ (79 %), $Eu$ (7 %), $Ce$ (5 %), and $Tb$ (4 %) could be recovered from 100 units of discarded FLs. Microwave treatment of phosphor and $NaOH$ (50 wt-%) yielded approximately 42 % $Y$, 100 % $Eu$, 65 % $Ce$, and 70 % Tb recovery in just 5 min. Approximately 9 g of REO and 5 g of cerium enriched leach residue were recovered from the microwave route within 5 min and depicted high microwave potential application in the recovery of $Ce$ and $Tb$ values from waste phosphor sample.
Źródło:
Physicochemical Problems of Mineral Processing; 2020, 56, 4; 710-722
1643-1049
2084-4735
Pojawia się w:
Physicochemical Problems of Mineral Processing
Dostawca treści:
Biblioteka Nauki
Artykuł

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