Temat: devolatilization - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Higher order approximations to coal pyrolysis distribution
Autorzy:: Paea, S.
McGuinness, M.
Powiązania:: https://bibliotekanauki.pl/articles/92138.pdf
Data publikacji:: 2018
Wydawca:: Główny Instytut Górnictwa
Tematy:: piroliza węgla
prosty model reakcji pierwszego rzędu
model z rozkładem energii aktywacji
odgazowanie
modelowanie
zadanie odwrotne
coal pyrolysis
single first order reaction model
distributed activation energy model
devolatilization
modelling
Gaussian
wide distribution case
inverse problem
Opis:: Coal pyrolysis is a complex process involving a large number of chemical reactions. Pyrolysis is a key step in all coal conversion processes. The Distributed Activation Energy Model (DAEM) is a state-of-the art approach to the problem of predicting the amount of volatile released versus activation energy or time. The distribution of mass released is usually assumed to be Gaussian. We present an inverse iterative approach together with a smoothing function to estimate the underlying distribution directly from volatilisation data.
Źródło:: Journal of Sustainable Mining; 2018, 17, 2; 76-86
2300-1364
2300-3960
Pojawia się w:: Journal of Sustainable Mining
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Skocz do pozycji: 2.

Tytuł:: Modeling of heat and mass transfer during thermal decomposition of a single solid fuel particle
Autorzy:: Wardach-Święcicka, I.
Kardaś, D.
Powiązania:: https://bibliotekanauki.pl/articles/240457.pdf
Data publikacji:: 2013
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:: fuel particles
devolatilization
pyrolysis
heat and mass transfer
ziarna paliwa
odgazowanie
piroliza
wymiana ciepła i masy
Opis:: The aim of this work was to investigate the heat and mass transfer during thermal decomposition of a single solid fuel particle. The problem regards the pyrolysis process which occurs in the absence of oxygen in the first stage of fuel oxidation. Moreover, the mass transfer during heating of the solid fuels is the basic phenomenon in the pyrolysis-derived alternative fuels (gas, liquid and solid phase) and in the gasification process which is focused on the generation of syngas (gas phase) and char (solid phase). Numerical simulations concern pyrolysis process of a single solid particle which occurs as a consequence of the particle temperature increase. The research was aimed at an analysis of the influence of particle physical properties on the devolatilization process. In the mathematical modeling the fuel grain is treated as an ideal sphere which consists of porous material (solid and gaseous phase), so as to simplify the final form of the partial differential equations. Assumption that the physical properties change only in the radial direction, reduces the partial derivatives of the angular coordinates. This leads to obtaining the equations which are only the functions of the radial coordinate. The model consists of the mass, momentum and energy equations for porous spherical solid particle heated by the stream of hot gas. The mass source term was determined in the wide range of the temperature according to the experimental data. The devolatilization rate was defined by the Arrhenius formula. The results of numerical simulation show that the heating and devolatilization time strongly depend on the physical properties of fuel. Moreover, proposed model allows to determine the pyrolysis process direction, which is limited by the equilibrium state.
Źródło:: Archives of Thermodynamics; 2013, 34, 2; 53-71
1231-0956
2083-6023
Pojawia się w:: Archives of Thermodynamics
Dostawca treści:: Biblioteka Nauki

Artykuł

Zmień widok

na półce

Informacja

Wyszukujesz frazę "devolatilization" wg kryterium: Temat

Źródło danych

Dostawca treści

Kolekcja

Rok wydania

Wydawca

Temat

Autor

Typ dokumentu

Język