Wszystkie pola: coal fuel - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Coal Micronization Studies In Vibrating Mill In Terms of Coal Water Slurry (CWS ) Fuel Preparation
Autorzy:: Robak, J.
Ignasiak, K.
Rejdak, M.
Powiązania:: https://bibliotekanauki.pl/articles/124634.pdf
Data publikacji:: 2017
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: CWS
slurry fuel
coal-water slurry
vibrating mill
Opis:: The paper presents the results of coal milling tests in the aspect of slurry fuel preparation. The tests were carried out with the use of vibrating mill with a working chamber of 47.5 dm³. The influence of milling time, amount and composition of grinding aids on the degree of fineness and particle size distribution have been investigated. It was found that the efficiency of the grinding process (in this type of milling device) depends primarily on the milling time and the share of grinding aids and – to a lesser extent – on their polydispersity. The study allows to conclude that the grinding time, composition and the share of used grinding aids enable to control the final grain size of coal, which has an impact on apparent viscosity of coal water slurry.
Źródło:: Journal of Ecological Engineering; 2017, 18, 2; 111-118
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Characteristics of Char from Low-Rank Coal Gasification
Autorzy:: Asof, Marwan
Arita, Susila
Andalia, Winny
Powiązania:: https://bibliotekanauki.pl/articles/24201706.pdf
Data publikacji:: 2023
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: low-grade coal
charcoal
fuel ratio
gasification
Opis:: The coal gasification process in this study aimed to increase the quality of low-rank coal (LRC) from lignite type to coal with semi-anthracite and anthracite grades with higher fixed carbon values. The gasification process was carried out at temperatures between 700-900 °C. In the initial stages of the study, the relationship between the increase in gasification temperature with the mass of coal and the gasification process time was investigated. The proximate and ultimate analysis was carried out to determine the characteristics of the raw materials used and the coal char produced from combustion. The analysis results are used to calculate the fuel ratio, where the fuel ratio is a parameter to determine the grade of coal. In addition, an SEM-spot EDS analysis was carried out on the gasified coal solids to ensure the fixed carbon content produced from the above process. The results showed that the gasification process could raise the grade of LRC into char products with semi-anthracite to anthracite, where the fuel ratio reached 10.84. From the product analysis results, the LRC coal gasification results using SEM-EDS showed that carbon reached 98.58%. The remaining inorganic elements in the product are less than 1.5%, such as Al, Si and K.
Źródło:: Journal of Ecological Engineering; 2023, 24, 4; 78--84
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Purification of Synthetic Gas from Fine Coal Waste Gasification as a Clean Fuel
Autorzy:: Faizal, Muhammad
Said, Muhammad
Nurisman, Enggal
Aprianti, Nabila
Powiązania:: https://bibliotekanauki.pl/articles/1838398.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: absorption
CO2 capture
Ca(OH)2
fine coal
hydration
Opis:: The presence of CO2 in the syngas is attracting more attention in terms of reducing the greenhouse gas emissions in its utilisation. The aim of this study was to purify syngas from the CO2 content of fine coal gasification. Fine coal is gasified with and without absorption using CaO, which is hydrated to Ca(OH) 2 in the modified updraft gasifier at 450–700 °C. Apart from investigating the CO2 absorption process, the gasification process also evaluates the influence of temperature in terms of its synergy with Ca(OH) 2. The best conditions for the gasification process are achieved at 700 °C. The content of CO2 was proven to be well absorbed, which is characterised by a decrease in the CO2 content and an increase in H2 in syngas. After the absorption process, the H2 content obtained increased from 42.6 mole% to 48.8 mole% of H2 at 700°C. The H2 ratio also increased after absorption to 2.57 from the previous value of 2.23. The highest absorption efficiency of CO2 by Ca(OH) 2 occurred at 700°C at 50.63%. With an increase in temperature in the gasification process with absorption, the CO2 content decreased dramatically from 16.9 mole% to 3.9%. Ca(OH) 2 has good absorption power at CO2 at high temperatures.
Źródło:: Journal of Ecological Engineering; 2021, 22, 5; 114-120
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Trace Elements in Popular Coals Burnt in Low Power Boilers
Autorzy:: Wiater, Józefa
Wojciula, Ada
Szatyłowicz, Ewa
Powiązania:: https://bibliotekanauki.pl/articles/2028186.pdf
Data publikacji:: 2021
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: hard coal
combustion
solid fuel
heavy metals
Opis:: The aim of the research was to demonstrate differences in the content of trace elements (U, Th, V, Cr, Mn, Fe, Co, Ni, Cu, Zn, Ga, Ge, As, Se, Cd, Mo, Hg, Pb, W, Ba) in coal mined in Poland and coal imported from Russia, which are widely available on the market. Ecophile, cube and nut were selected for the research. Among them 3 come from Russia and 3 from Poland. The samples were mineralized and the heavy metal content was determined with the use of mass spectrometry with excitation in induced plasma. The research allowed us to conclude that the same carbon grades showed completely different metal contents and depended on the place of origin. The greatest amount of trace elements was found to be found in ecophysics from Poland (durin). Relatively large contamination with trace elements was also found in Polish peach (window) and in Russian walnut. A relatively high content of uranium was found in three samples, including the ecophyses. When burning coal, even of high quality, we expose the environment to the burden of trace elements, including radioactive elements present in their composition. Heavy metals from coal combustion constantly accumulate in the environment and so far no standards have been established for their content in this fuel.
Źródło:: Journal of Ecological Engineering; 2021, 22, 11; 178-187
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Proces wytwarzania granulatów z drobnych frakcji węglowych pod kątem ich wykorzystania w procesie zgazowania
Preparation of granules made of fine-grained coal fractions for gasification process
Autorzy:: Supernok, K.
Robak, J.
Ignasiak, K.
Szul, M.
Powiązania:: https://bibliotekanauki.pl/articles/401015.pdf
Data publikacji:: 2018
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: granulowanie
paliwo granulowane
muł węglowy
flotokoncentrat
zgazowanie
granulation
granulated fuel
coal sludge
coal flotation-concentrate
gasification
Opis:: W artykule zaprezentowano rezultaty testów wytwarzania granulatów paliwowych z drobnoziarnistych frakcji węglowych. Surowcem stosowanym do badań były wybrane drobnoziarniste frakcje węglowe – muł węglowy oraz flotokoncentrat, pozyskane z procesu wzbogacania węgla w kopalniach węgla kamiennego. Celem przeprowadzonych prac było opracowanie receptury i parametrów procesu wytwarzania granulatu o właściwościach fizykochemicznych, umożliwiających ich transport, dozowanie oraz zgazowanie w złożu stałym i fluidalnym. W pracy określono udział poszczególnych składników (mułu i flotokoncentratu węglowego oraz spoiw) oraz warunki granulowania z wykorzystaniem techniki aglomeracji metodą otaczania na granulatorze talerzowym. Stwierdzono, że mieszanka składająca się z 30 cz. wag. mułu i 70 cz. wag. flotokoncentratu węglowego, wzbogacona cementem portlandzkim w ilości 3% w stosunku do suchej masy składników węglonośnych, pozwala na uzyskanie granulatu paliwowego spełniającego wymagania dla ich zgazowania w instalacjach badawczych IChPW (zgazowanie fluidalne i w złożu stałym) pod względem wartości opałowej, zawartości popiołu, granulacji i wytrzymałości mechanicznej.
The paper presents the results of tests for the production of fuel granules from fine-grained coal fractions. The raw material used for the research was selected fine coal fractions – coal sludge and coal flotation concentrate, obtained from the process of coal enrichment in hard coal mines. The aim of the work was to develop a recipe and parameters for the process of granules production with adequate physicochemical properties, enabling their transport, dosing and gasification in a fixed and fluidized bed system. The work determined the share of specified components (coal sludge, coal flotation concentrate and binders) and the conditions of granulation using the agglomeration technique in the disk granulator. It was found that a mixture consisting of 30% wt. coal sludge and 70% wt. coal flotation concentrate with the addition of 3% Portland cement in relation to the dry matter of carbonaceous components, allows obtaining granules meeting the requirements for their gasification in IChPW research installations (fluidized bed and fixed bed gasification) in terms of calorific value, ash content, particle size distribution and mechanical strength.
Źródło:: Inżynieria Ekologiczna; 2018, 19, 5; 1-13
2081-139X
2392-0629
Pojawia się w:: Inżynieria Ekologiczna
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Assessment and Analysis of the Soot Load Emitted from Hard Coal Combustion in the Area of a Selected Settlement Unit
Autorzy:: Szatyłowicz, Ewa
Siemieniuk, Anna
Wiater, Józefa
Powiązania:: https://bibliotekanauki.pl/articles/2173375.pdf
Data publikacji:: 2022
Wydawca:: Polskie Towarzystwo Inżynierii Ekologicznej
Tematy:: soot
combustion
solid fuel
winter season
PAHs
Opis:: Currently, the soot load from solid fuel combustion is not measured or counted, because it is included as part of particulate matter emitted from combustion sources. However, recent reports indicate that after carbon dioxide, soot is the most important contributor to current climate change. Therefore, an attempt was made to assess the soot load that is emitted during the winter season from individual heat sources where hard coal was burned or co-fired. Soot emission analysis and assessment were carried out in the selected settlement unit. Soot was collected monthly throughout the heating period at the chimney flue outlet, and analyzed for the PAH content. From these results and the information obtained from the users of individual heat sources, the soot load emitted from the installation in question during the entire heating period and the load of the sum of 16 PAHs and benzo(a)pyrene also during the entire heating period were calculated. It was found that the PAH content in soot largely depends on the type of boiler, the form of hard coal and wood addition burned, and the age of the boiler. The soot load, on the other hand, depends on the amount of hard coal burned, the type of boiler, how the combustion process is carried out, etc.
Źródło:: Journal of Ecological Engineering; 2022, 23, 9; 187--192
2299-8993
Pojawia się w:: Journal of Ecological Engineering
Dostawca treści:: Biblioteka Nauki

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