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Wyszukujesz frazę "coking process" wg kryterium: Temat


Wyświetlanie 1-3 z 3
Tytuł:
Transient one-dimensional model of coal carbonization in a stagnant packed bed
Autorzy:
Polesek-Karczewska, S.
Kardaś, D.
Grucelski, A.
Stelmach, S.
Wardach-Święcicka, I.
Powiązania:
https://bibliotekanauki.pl/articles/240628.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
carbonization
coking process
coal charge evaporation
mass source
pyrolytic gases
uwęglenie
proces koksowania
odparowanie
źródło masy
gaz pirolityczny
Opis:
In the present paper, the one-dimensional model for heat and mass transfer in fixed coal bed was proposed to describe the thermal and flow characteristics in a coke oven chamber. For the purpose of the studied problem, the analysis was limited to the calculations of temperature field and pyrolytic gas yield. In order to verify the model, its theoretical predictions for temperature distribution during wet coal charge carbonization were compared with the measurement results found in the literature. In general, the investigation shows good qualitative agreement between numerical and experimental data. However, some discrepancy regarding the temperature characteristics at the stage of evaporation was observed.
Źródło:
Archives of Thermodynamics; 2013, 34, 2; 39-51
1231-0956
2083-6023
Pojawia się w:
Archives of Thermodynamics
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Steam Reforming Catalyst Geometry on the Performance of Tubular Reformer – Simulation Calculations
Autorzy:
Franczyk, E.
Gołębiowski, A.
Borowiecki, T.
Kowalik, P.
Wróbel, W.
Powiązania:
https://bibliotekanauki.pl/articles/184862.pdf
Data publikacji:
2015
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
tubular steam reforming
nickel catalyst geometry
process simulation
catalyst coking
process intensification
symulacja procesu
katalizator koksujący
intensyfikacja
Opis:
A proper selection of steam reforming catalyst geometry has a direct effect on the efficiency and economy of hydrogen production from natural gas and is a very important technological and engineering issue in terms of process optimisation. This paper determines the influence of widely used seven-hole grain diameter (ranging from 11 to 21 mm), h/d (height/diameter) ratio of catalyst grain and Sh/St (hole surface/total cylinder surface in cross-section) ratio (ranging from 0.13 to 0.37) on the gas load of catalyst bed, gas flow resistance, maximum wall temperature and the risk of catalyst coking. Calculations were based on the one-dimensional pseudo-homogeneous model of a steam reforming tubular reactor, with catalyst parameters derived from our investigations. The process analysis shows that it is advantageous, along the whole reformer tube length, to apply catalyst forms of h/d = 1 ratio, relatively large dimensions, possibly high bed porosity and Sh/St ≈ 0.30-0.37 ratio. It enables a considerable process intensification and the processing of more natural gas at the same flow resistance, despite lower bed activity, without catalyst coking risk. Alternatively, plant pressure drop can be reduced maintaining the same gas load, which translates directly into diminishing the operating costs as a result of lowering power consumption for gas compression.
Źródło:
Chemical and Process Engineering; 2015, 36, 2; 239-250
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Research on thermal decomposition of waste PE/PP
Autorzy:
Kuźnia, M.
Magdziarz, A.
Powiązania:
https://bibliotekanauki.pl/articles/184946.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
plastic wastes
supplemental fuel
blast furnace process
coking of coal
odpady z tworzyw sztucznych
paliwo uzupełniające
proces wielkopiecowy
koksowanie węgla
Opis:
The most important and the most frequently used plastics are polyethylene (PE) and polypropylene (PP). They are characterised with high heating values (approximately 40 MJ/kg). Moreover, their chemical composition, based mainly on carbon and hydrogen, allows to use them in industrial processes. One of the methods of utilisation of plastic waste can be its use in the metallurgical industry. This paper presents results of thermal decomposition of waste PE/PP. Chemical and thermal analysis (TG) of studied wastes was carried out. Evolved gaseous products from the decomposition of wastes were indentified using mass spectrometry (TG-MS). This paper also presents an application of plastic wastes as supplemental fuel in blast furnace processes (as a substitute for coke) and as an addition in processes of coking coal.
Źródło:
Chemical and Process Engineering; 2013, 34, 1; 165-174
0208-6425
2300-1925
Pojawia się w:
Chemical and Process Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-3 z 3

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