A method of direct measurement of solid fuel particle ignition temperature

In this paper, we use the research methods of sintering cup.On the basis of the determination of solid fuel particle size composition and the distribution in the mixture. During the sintering process, respectively, 5min, 10min, 15min, 20min interrupt the test, by dectecting the distribution of solid fuel in the mixture to study the migration phenomenon of solid fuel during the sintering process. The results showed that: during the sintering process, the main migration of the fuel is the migration of fine particles, including the fuel migration of 0.25-0.5mm grain size, part of the 0.5-1mm grain size and a small amount of-0.25mm grain size,but most of the fuel migrated will be re-adsorbed, about 0.11% of the fuel with the air flow through the material layer, the migration of fuel to ease the state of segregation in the vertical direction along the material layer, so that cause actual participation in the combustion of the fuel content in line along the height direction of the material layer.

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Modern State and Topical Issues of Studying Solid Fuel Particle Primary Fragmentation Processes as Applied to Biomass Combustion and Gasification in Fluidized and Dense Bed (Review)

Thermal Engineering ◽

10.1134/s0040601518120042 ◽

2018 ◽

Vol 65 (12) ◽

pp. 875-884

Author(s):

D. S. Litun ◽

G. A. Ryabov

Keyword(s):

Solid Fuel ◽

Biomass Combustion ◽

Modern State ◽

Fuel Particle ◽

Primary Fragmentation ◽

Fragmentation Processes

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Grid-independent Eulerian-Lagrangian approaches for simulations of solid fuel particle combustion

Chemical Engineering Journal ◽

10.1016/j.cej.2019.123964 ◽

2020 ◽

Vol 387 ◽

pp. 123964 ◽

Cited By ~ 1

Author(s):

Jingyuan Zhang ◽

Tian Li ◽

Henrik Ström ◽

Terese Løvås

Keyword(s):

Solid Fuel ◽

Fuel Particle ◽

Particle Combustion

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Effect of Solid Fuel Particle Size on Burning Rate Using Computational Analysis

Proceedings of the World Congress on Momentum, Heat and Mass Transfer ◽

10.11159/csp16.125 ◽

2016 ◽

Author(s):

Thomas Marino ◽

Vahid Motevalli

Keyword(s):

Particle Size ◽

Burning Rate ◽

Solid Fuel ◽

Computational Analysis ◽

Fuel Particle

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Heterogeneous ignition of a solid fuel particle by a hot gas

Combustion Explosion and Shock Waves ◽

10.1007/bf00782244 ◽

1985 ◽

Vol 20 (5) ◽

pp. 531-534

Author(s):

V. V. Matveev ◽

A. N. Grechanyi

Keyword(s):

Solid Fuel ◽

Fuel Particle ◽

Heterogeneous Ignition ◽

Hot Gas

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Modeling of heat and mass transfer during thermal decomposition of a single solid fuel particle

Archives of Thermodynamics ◽

10.2478/aoter-2013-0010 ◽

2013 ◽

Vol 34 (2) ◽

pp. 53-71 ◽

Cited By ~ 6

Author(s):

Izabela Wardach-Święcicka ◽

Dariusz Kardaś

Keyword(s):

Mass Transfer ◽

Thermal Decomposition ◽

Physical Properties ◽

Heat And Mass Transfer ◽

Solid Particle ◽

Solid Fuel ◽

Alternative Fuels ◽

Solid Phase ◽

Fuel Particle ◽

Pyrolysis Process

Abstract 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.

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