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Wyświetlanie 1-15 z 94
Tytuł:
Preliminary Investigation on Leaching Behavior of Zinc ash
Autorzy:
Rudnik, E.
Włoch, G.
Szatan, L.
Powiązania:
https://bibliotekanauki.pl/articles/353814.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
zinc ash
hydrometallurgy
leaching
recovery
Opis:
Oxide fraction of industrial zinc ash from hot dip galvanizing was characterized in terms of composition and leaching behaviour in 10% sulfuric acid solution. Waste product contained about 68% Zn, 6% Cl, 3% Al, 1% Fe, 0.7% Si, 0.5% Pb and minor percentages of other metals (Mn, Cu, Ti etc.). It consisted mainly of zinc oxide contaminated with metallic zinc, zinc hydroxide chloride and silica. Dissolution of the metals from the material was determined as a function of solid to liquid ratio (50-150 kg/m3), temperature (20°C and 35°C) and agitation rate (300 and 900 rpm). The best results (50 g/dm3 Zn(II) at 78% zinc recovery) were obtained for 100 kg/m3 and the temperature of 20°C. Increase in the agitation rate had weak effect on the zinc yield. The final solutions were contaminated mainly by Fe(II, III) ions. Leaching of the material was an exothermic process with the reaction heat of about 800 kJ/kg.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 801-807
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of the distribution of chemical components in selected landfill layers and fly ash fractions
Autorzy:
Sambor, A.
Szymanek, A.
Powiązania:
https://bibliotekanauki.pl/articles/185515.pdf
Data publikacji:
2012
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
popiół lotny
produkty uboczne spalania
fly ash utilization
combustion by-products
fly ash
combustible matter
separation
Opis:
The article concerns fly ashes generated from the combustion of hard coal and deposited on landfills. Investigation results describing fly ash taken from a combustion waste landfill are presented in the article. The investigation results indicate a possibility for combusting the coal reclaimed by separation from the fly ash and utilizing the remaining fly ash fractions.
Źródło:
Chemical and Process Engineering; 2012, 33, 2; 221-229
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Reclamation and Reutilization of Incinerator Ash in Artificial Lightweight Aggregate
Autorzy:
Norlia, Mohamad Ibrahim
Amat, Roshazita Che
Rahim, Mustaqqim Abdul
Rahim, Nur Liza
Rahim, Abdul Razak
Powiązania:
https://bibliotekanauki.pl/articles/2048860.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
light weight aggregate
incinerator
bottom ash
fly ash
concrete
Opis:
This study focused on the reclamation of ash from incineration process and development of new artificial lightweight aggregate (LWA) that have comparable properties with existing natural coarse aggregate. The main objective of this study is to examine potential use of recycled municipal solid waste incineration (MSWI) ash as raw material in LWA production with a method of cold-bonded pelletization. Two types of incineration ash which is bottom ash (BA) and fly ash (FA) were collected from Cameron Highland Incineration Plant, Malaysia. The properties of BA and FA are studied by means of X-Ray Fluorescence (XRF) and microstructure of these ashes were inspected using Scanning Electron Microscope (SEM). The properties of BALA and FALA produced in this study is examined including loose bulk density, water absorption and aggregate impact value (AIV). From the results of both types of artificial LWA, the lowest loose bulk density of BALA is BALA50 with 564.14 kg/m3 and highest is at 831.19 kg/m3. For FALA50, lowest loose bulk density is 573.64 kg/m3 and highest is 703.35 kg/m3. Water absorption of BALA and FALA is quite similar with one another in with the value of 23.8% and 22.6%, respectively. Generally, FALA have better qualities of LWA comparing with BALA with lower bulk density and water absorption and can be categorized as strong aggregate. In summary, reclamation and reutilization of incinerator ash has generated acceptable qualities for artificial LWA. Both types of BA and FA shown a great potential to be recycled as additional materials in artificial aggregate production.
Źródło:
Archives of Metallurgy and Materials; 2022, 67, 1; 269-275
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The content of heavy metal ions in ash from waste incinerated in domestic furnaces
Autorzy:
Poluszyńska, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/205178.pdf
Data publikacji:
2020
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
heavy metals
wastes
ICP-MS
ash from waste
Opis:
The article presents the results of preliminary tests obtained from the analysis of ash coming from the combustion of various types of waste in household furnaces. The aim of this work was to examine the influence of various types of waste burned in household furnaces on the elemental composition of the generated ash. As part of the research, analyses of ash generated from the incineration of mixed waste, plastics, wood, textiles, rubber waste and paper were made. The content of selected metal ions: Mn, Cu, Mo, Zn, Cd, Tl, Cr, Co, Ni, As, Sn, Sb, Pb, V was determined in the tested samples, according to PN-EN ISO 17294-2: 2016-11 standard. The highest concentrations of zinc were found in the large-sized waste, rubber and textile ash samples and highest concentrations of copper were found in the plastic and paper ash samples. The highest concentrations for elements such as copper, lead, cobalt and chromium were recorded for samples of rubber and large-sized waste containing e.g. varnished furniture boards. The obtained results showed that depending on the waste incinerated, the content of selected metals was significantly different, and the highest concentrations were noted for samples of large-sized waste, waste from segregated plastics and waste from rubbers.
Źródło:
Archives of Environmental Protection; 2020, 46, 2; 68-73
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparative study on the characteristics of coal fly ash and biomass ash geopolymers
Porównanie właściwości geopolimerów na bazie lotnego popiołu ze spalania węgla i biomasy
Autorzy:
Sitarz-Palczak, Elżbieta
Kalembkiewicz, Jan
Galas, Dagmara
Powiązania:
https://bibliotekanauki.pl/articles/204708.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
immobilization
fly ash
metals
geopolymer
unieruchomienie
popiół lotny
metale
geopolimer
Opis:
Geopolymers are a new class of materials that can be synthesized using natural minerals, and waste materials. Among these substrates, the use of fly ash is desirable as it involves the conversion of a copious waste material into a useful product. The aim of the research was geopolymers synthesis from coal fly ash and biomass ash. Concentrated sodium hydroxide and sodium silicate solutions were used as activators in geopolymerisation reaction. The results show that both coal fly ash and biomass ash can be utilized as source materials for the production of geopolymers. The surface morphology and chemical composition analysis were examined for the obtained geopolymers and ashes from coal and biomass combustion by SEM-EDS methods. It was found almost total disappearance of spherical forms of grains and reduction the porosity of structure for geopolymer based on fly ash from coal combustion. While the structure of the geopolymer based ash from biomass combustion is more porous. The UV-VIS-NIR spectra were performed on the coal fly ash, biomass ash and geopolymers. They showed that the obtained geopolymers possess optical and photocatalytic properties. The similarity of the geopolymer network and the zeolite framework in relation to ion exchange and accommodation of metal ions open questions on possibilities for the application of geopolymer materials as amorphous analogues of zeolite. The FT-IR spectra analyses were used on the geopolymers before and after metals sorption. It was found that geopolymer based on ash from biomass combustion has better sorption properties compared to geopolymer based on ash from coal combustion.
Geopolimery są nową klasą materiałów, które mogą być syntetyzowane z użyciem naturalnych minerałów i materiałów odpadowych. Wśród tych substratów, użycie popiołu lotnego jest pożądane ponieważ wiąże się z możliwością konwersji materiału odpadowego w użyteczny produkt. Celem badań była synteza geopolimerów z lotnego popiołu węglowego oraz z popiołu z biomasy. Jako aktywatory reakcji geopolimeryzacji były stosowane stężony wodorotlenek sodu i roztwór krzemianu sodu. Rezultaty pokazują, że zarówno lotny popiół węglowy i popiół z biomasy mogą być wykorzystane jako źródło materiałów do produkcji geopolimerów. Badania morfologii powierzchni i analizę składu chemicznego dla otrzymanych geopolimerów i popiołów ze spalania węgla i biomasy wykonano metodą SEM-EDS. Stwierdzono prawie całkowity zanik form kulistych ziaren i zmniejszenie porowatości struktury dla geopolimeru na bazie popiołu lotnego ze spalania węgla. W przypadku geopolimeru na bazie popiołu ze spalania biomasy występuje struktura bardziej porowata. Widma UV-VIS zostały wykonane dla lotnego popiołu węglowego, popiołu z biomasy oraz geopolimerów. Pokazują one, że otrzymane geopolimery wykazują właściwości optyczne i fotokatalityczne. Podobieństwo sieci geopolimeru i struktury zeolitu w związku z wymianą jonową i akomodacją jonów metali otwiera pytania dotyczące możliwości zastosowania materiałów geopolimerowych, jako bezpostaciowych analogów zeolitu. Widma FT-IR zostały wykonane dla geopolimerów przed i po sorpcji metali. Stwierdzono, że geopolimer na bazie popiołu z biomasy ma lepsze właściwości sorpcyjne w porównaniu do geopolimeru na bazie popiołu lotnego ze spalania węgla.
Źródło:
Archives of Environmental Protection; 2019, 45, 1; 126-135
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Geopolymer mortar incorporating high calcium fly ash and silica fume
Autorzy:
Prabha, V. C.
Revathi, V.
Powiązania:
https://bibliotekanauki.pl/articles/231279.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
zaprawa geopolimerowa
wytrzymałość na ściskanie
utwardzanie w otoczeniu
popiół lotny
zawartość wapnia wysoka
pył krzemionkowy
geopolymer mortar
compressive strength
ambient curing
high-calcium ash
fly ash
silica fume
Opis:
An attempt was made in the present work to study the compressive strength and microstructure of geopolymer containing high calcium fly ash (HCFA) and silica fume. Concentration of sodium hydroxide solution 8M, 10M, 12M & 14M, liquid to binder ratio 0.5 and sodium hydroxide to sodium silicate ratio 2.5 were selected for the mixes. Geopolymer mortar test results indicated that the mix with 40% silica fume by the weight of HCFA yielded higher compressive strength under ambient curing. The XRD pattern typically shows the major portion of amorphous phase of geopolymer. The existence of C-A-S-H gel, N-A-S-H gel and hydroxysodalite gel products were observed through SEM which developed dense microstructure and thus enhanced strength of HCFA and silica fume geopolymer.
Źródło:
Archives of Civil Engineering; 2019, 65, 1; 3-16
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Unburned carbon in the circulating fluidised bed boiler fly ash
Autorzy:
Kobyłecki, R.
Powiązania:
https://bibliotekanauki.pl/articles/185654.pdf
Data publikacji:
2011
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
kocioł CFB
popiół lotny
spalanie węgla
CFB boiler
fly ash
coal combustion
unburned carbon
Opis:
The paper describes the results of various actions and industrial tests conducted in order to decrease the content of unburned carbon in the fly ash of a circulating fluidised bed combustor (CFBC). Several attempts to improve the situation were made and the effects of several parameters on the unburned carbon content in the fly ash were investigated (e.g. bed temperature, cyclone separation efficiency, fuel particle size distribution, boiler hydrodynamics, grid design, and fuel data). Unfortunately, no satisfactory solution to these problems was found. Probably, apart from attrition and char fragmentation, additional factors also contributed to the formation of unburned carbon in the CFBC fly ash.
Źródło:
Chemical and Process Engineering; 2011, 32, 4; 255-266
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Correlation between compressive strengths and water absorption of fly ash cement mortar immersed in water
Autorzy:
Huang, Qian
Zhao, Liang
Powiązania:
https://bibliotekanauki.pl/articles/231346.pdf
Data publikacji:
2019
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
zaprawa cementowo-popiołowa
zanurzenie w wodzie
cement
popiół lotny
wytrzymałość na ściskanie
absorpcja wody
korelacja
cement-fly ash mortar
water immersion
fly ash
compressive strength
water absorption
correlation
Opis:
The compressive strength and water absorption of cement mortars with different water-binder ratio (0.35, 0.45 and 0.55) and fly ash content (0, 10%, 20% and 30%) under water immersion were investigated, and the correlation between them was further analyzed. The internal microstructure and phase composition of mortar was studied by scanning electron microscopy (SEM) and X-ray diffraction (XRD), respectively. The results show that the inside of mortar mixed with fly ash displayed the loose and porous microstructure. Therefore, the incorporation of fly ash reduced the compressive strength of mortar, especially the early strength, and the strength decreased with the increase of fly ash content, and the water absorption of mortar also increased. There was a linear correlation between the compressive strength and water absorption of mortar with the equation: fc = -3.838β + 62.332, where fc and β represented the compressive strength and water absorption, respectively. Therefore, when the water absorption of mortar immersed in water was measured, its corresponding compressive strength could be preliminarily inferred through this equation, which was of great significance for detecting and identifying the stability and safety of hydraulic structures.
Źródło:
Archives of Civil Engineering; 2019, 65, 3; 141-152
1230-2945
Pojawia się w:
Archives of Civil Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of Grinding Fineness of Fly Ash on the Properties of Geopolymer Foam
Autorzy:
Szabó, R.
Gombkötö, I.
Svéda, M.
Mucsi, G.
Powiązania:
https://bibliotekanauki.pl/articles/355065.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
fly ash
grinding
rheology
geopolymer foam
cell structure
Opis:
Present paper deals with the development of geopolymer foam prepared from ground F class power station fly ash. The effect of the fly ash fineness on the rheology of the geopolymer paste and the foam properties have been investigated. The raw fly ash was ground in a ball mill for various duration, 5, 10, 20, 30, 60 and 120 min. Geopolymer paste was prepared from the raw and ground fly ash with NaOH – sodium silicate mixture as alkaline activator. Geopolymer foam production was made using H2O2 as foaming agent. Additionally, the geopolymer material structure was investigated by Fourier transform infrared spectrometer, the foam cell structure was monitored using optical microscopy. The rheological behaviour of the geopolymer paste changed due to the grinding of fly ash (from Bingham plastic to Newtonian liquid). Grinding of fly ash has a significant effect on the physical properties as well as on the cell structure of the geopolymer foam.
Źródło:
Archives of Metallurgy and Materials; 2017, 62, 2B; 1257-1261
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Calcination of Aluminum Chloride Hexahydrate (ACH) for Alumina Production: Implications for Alumina Extraction from Aluminum Rich Fly Ash (ARFA)
Autorzy:
Zhao, L.
Powiązania:
https://bibliotekanauki.pl/articles/354384.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
calcination
aluminum chloride hexahydrate
alumina rich fly ash
acid leaching
Opis:
Alumina rich fly ash (ARFA) has been regarded as the alternative to bauxite in China. Hydrochloric acid process could be favored for alumina extraction, necessitating calcination of aluminum chloride hexahydate (ACH). In this work, the TGA/DSC results of ACH were used to suggest calcination procedures. Two-step calcinations of 200-1000°C and 350-1000°C did not increase the surface area of alumina, by comparison with one step 1000°C calcination, and a slow heating rate could improve the surface area. Calcination temperature was increased from 950 to 1250°C in a step of 50°C, and XRD, XRF, BET and gas pycnometer were used to characterize the alumina from calcinated ACH. Consistent results were obtained by these different techniques, and two groups of impurities were identified and related to alumina purity and surface area. By comparison with clays, it was suggested to remove impurities such as MgO, Na2 O, K2 O, P2 O5 and SO3 in hydrochloric acid leaching of ARFA.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 1; 235-240
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Preparation of a Ceramic Proppants for Hydraulic Fracturing Using F - Type Fly Ash
Autorzy:
Kasprzyk, K.
Kogut, K.
Zboromirska-Wnukiewicz, B.
Dyjakon, A.
Powiązania:
https://bibliotekanauki.pl/articles/355374.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
proppants
ceramic materials
shale gas
hydraulic fracturing
fly ash
Opis:
In the paper, the technology of the production of the modified ceramic proppants used in the shale gas extracting process is described. The natural available materials and uncomplicated process to new ceramic proppants preparation were applied. The modification of the ceramic proppants based on the addition of the waste material as fly ash. The produced ceramic material in the form of granules characterized by high mechanical properties and low production costs. Moreover, the obtained good values of compressive strength and gas permeability for investigated proppants confirmed that this material has appropriate properties to be used in the hydraulic fracturing.
Źródło:
Archives of Metallurgy and Materials; 2018, 63, 2; 1065-1070
1733-3490
Pojawia się w:
Archives of Metallurgy and Materials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Leaching of heavy metals from MSWI fly ash : experiments vs. simulation
Autorzy:
Qiu, Q
Jiang, X.
Chen, Z.
Lu, S.
Ni, M.
Powiązania:
https://bibliotekanauki.pl/articles/205253.pdf
Data publikacji:
2018
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
simulation
MSWI fly ash
microwave
hydrothermal treatment
Visual MINTEQ
Opis:
In this work, pH-dependence experiments and leaching modeling using Visual MINTEQ were performed to evaluate the stability and simulate the leaching characteristics of heavy metals in municipal solid waste incineration (MSWI) fly ash. Modeling the equilibrium concentration of Cd, Cu, Cr, Ni, Pb and Zn in raw and treated fly ash was the main target and was conducted over a pH range of 0.5–14. In addition, simulation of the leaching behavior of MSWI fly ash with different additives was also conducted. The treated fly ash was solidified by a microwave-assisted hydrothermal process with added phosphate. The initial elemental concentrations of MSWI fly ash, including raw and treated fly ash, were detected by a microwave apparatus and inductively coupled plasma atomic emission spectroscopy (ICP-AES). The ICP-AES analysis showed that most leaching concentrations of treated fly ash decreased considerably compared to the raw fly ash. The simulation results indicated that the dissolution/precipitation simulation models of Zn, Cu and Pb were broadly consistent with the experimental results, while the leaching behaviors of Ni, Cr and Cd were determined by both dissolution/precipitation and surface complexation mechanisms. In addition, the models of reagent solidification revealed that the stabilization effect of Na2S was better than that of Na2CO3. This model will be useful in the evaluation of the leaching concentrations of heavy metals in fly ash.
Źródło:
Archives of Environmental Protection; 2018, 44, 2; 55-61
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of the Distribution of Chemical Compounds from Fly Ash Exposed to Weather Conditions
Autorzy:
Sambor, A.
Szymanek, A.
Powiązania:
https://bibliotekanauki.pl/articles/185359.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
składowisko
emigracja
popiół lotny
związki chemiczne
warunki atmosferyczne
landfill
migration
fly ash
chemical compounds
weather conditions
Opis:
The paper presents investigation results of the migration of a chemical compound contained in fly ash deposited on a dry furnace waste landfill site exposed to weather conditions. Climate conditions are able to significantly affect chemical component distribution in a block of deposited, moving chemical compounds to different depths. The main aim of the investigations was to determine the chemical component distribution of deposited fly ash in the landfill. Identification of chemical components based on XRF analysis indicated the existence of differences in both tested storage layer and the fraction of fly ash.
Źródło:
Chemical and Process Engineering; 2014, 35, 3; 265-275
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Physical and soil water properties of technosols developed from lignite fly ash
Autorzy:
Kaczmarek, Zbigniew
Mocek-Płóciniak, Agnieszka
Gajewski, Piotr
Mendyk, Łukasz
Bocianowski, Jan
Powiązania:
https://bibliotekanauki.pl/articles/1845408.pdf
Data publikacji:
2021
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
technosols
technogenic soils
fly ash
physical and soil water properties
reclamation
Opis:
The aim of this study was to determine the influence of reclamation on selected soil water properties in soils developed from lignite fly ash, deposited as a dry landfill, twenty years after forest reclamation was initiated. Five soil profiles, classified as technogenic soils (Technosols) within the fly ash disposal site of the Adamów (central Poland) power plant, were selected for this study. Disturbed and undisturbed samples (V=100 cm3) were collected from depths of 5–15 cm and 30–60 in each soil profile. The following physical properties were determined: particle size distribution, particle density, bulk density, soil moisture, hygroscopic water content, and the soil-water potential. Readily available water (RAW; difference of water content at pF=2.0 and at pF=3.7) and total available water (TAW; difference of water content at pF=2.0 and at pF=4.2) were calculated based on soil moisture tension (pF) values. The following chemical properties were determined: soil reaction, total organic carbon, total nitrogen content, carbonate content. Statistical analyses were conducted using the GenStat 18 statistical software package. The soils under study were characterized by very low bulk density, high total porosity, high field water capacity and maximum hygroscopicity. The RAW/TAW ratio values indicate very effective water retention in the soils, thereby ensuring a satisfactory water supply to the plants. However, statistical analysis did not show any clear trends in variability of any determined properties. The small differences in observed outcomes probably resulted from the original variability of the fly ash deposited on the studied landfill. Obtained results show the strong similarity of fly ash derived soils and Andosols in respect of physical and soil-water properties.
Źródło:
Archives of Environmental Protection; 2021, 47, 2; 95-102
2083-4772
2083-4810
Pojawia się w:
Archives of Environmental Protection
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The utilisation of fly ash in CO2 mineral carbonation
Autorzy:
Jaschik, J.
Jaschik, M.
Warmuziński, K.
Powiązania:
https://bibliotekanauki.pl/articles/952688.pdf
Data publikacji:
2016
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
mineral carbonation
sequestration of CO2
industrial waste
fly ash
dissolution
sekwestracja CO2
odpady przemysłowe
popiół lotny
rozpuszczanie
Opis:
The fixation of CO2 in the form of inorganic carbonates, also known as mineral carbonation, is an interesting option for the removal of carbon dioxide from various gas streams. The captured CO2 is reacted with metal-oxide bearing materials, usually naturally occurring minerals. The alkaline industrial waste, such as fly ash can also be considered as a source of calcium or magnesium. In the present study the solubility of fly ash from conventional pulverised hard coal fired boilers, with and without desulphurisation products, and fly ash from lignite fluidised bed combustion, generated by Polish power stations was analysed. The principal objective was to assess the potential of fly ash used as a reactant in the process of mineral carbonation. Experimental were done in a 1 dm 3 reactor equipped with a heating jacket and a stirrer. The rate of dissolution in water and in acid solutions was measured at various temperatures (20 – 80ºC), waste-to-solvent ratios (1:100 – 1:4) and stirrer speeds (300 – 1100 min -1). Results clearly show that fluidised lignite fly ash has the highest potential for carbonation due to its high content of free CaO and fast kinetics of dissolution, and can be employed in mineral carbonation of CO2.
Źródło:
Chemical and Process Engineering; 2016, 37, 1; 29-39
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-15 z 94

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