A new char combustion kinetic model – Part 2: Empirical validation

Fuel ◽  
2012 ◽  
Vol 96 ◽  
pp. 168-175 ◽  
Author(s):  
Andrés Rojas ◽  
Juan Barraza ◽  
Richelieu Barranco ◽  
Edward Lester
Keyword(s):  
Kinetic Model ◽  
Empirical Validation ◽  
Char Combustion

scholarly journals Empirical validation of a two-state kinetic model for the B-Z transition of double-stranded poly[d(G-m5C)]

1999 ◽  
Vol 4 (6) ◽  
pp. 759-765 ◽  
Author(s):  
M. A. Fuertes ◽  
José Manuel Pérez ◽  
Víctor Manuel González ◽  
Carlos Alonso
Keyword(s):  
Kinetic Model ◽  
Empirical Validation ◽  
State Kinetic

Heating Process Characteristics and Kinetics of Biomass at Different Oxygen Concentrations

2017 ◽  
Vol 15 (4) ◽  
Author(s):  
Xingxing Cheng ◽  
Yilan Xu ◽  
Junge Li ◽  
Zhiqiang Wang ◽  
Chunyuan Ma
Keyword(s):  
Kinetic Model ◽  
Oxygen Diffusion ◽  
Combustion Reaction ◽  
Oxygen Effect ◽  
Heating Process ◽  
Model Parameters ◽  
Biomass Fuels ◽  
Char Combustion ◽  
Process Characteristics ◽  
Oxygen Concentrations

Abstract Mass transfer is very important for the combustion of biomass fuels, especially pellets. The oxygen diffusion, which results in a nonuniform distribution of oxygen in the pellets, should be considered in the modeling of pellet combustion. In this study, the effect of oxygen on thermal degradation of biomass is studied by thermogravimetric (TG) experiments and then a kinetic model considering oxygen effect is developed. The fuels investigated are spruce, sophora, wheat straw, and peanut straw. TG curves are taken under different oxygen concentrations, ranging from 0 to 20 %. Oxygen concentration has little effect on the devolatilization but is critical for the behavior of char combustion. Reaction mechanism is proposed based on the observation of decomposition at different reaction conditions. The kinetic model consists of three devolatilization reactions (for cellulose, hemicellulose, and lignin) and one char combustion reaction. In the devolatilization steps, char and gas are formed as products and oxygen is not involved in the reactions. A power law dependence of oxygen is assumed for the char combustion stage. The model parameters are fitted by the experimental TG data and good agreement is observed between the experimental and modeled data at various oxygen concentrations and for different biomass fuels. It is expected that the developed kinetic model could be applied for the modeling of pellets combustion considering oxygen diffusion process.

A new char combustion kinetic model 1. Formulation

Fuel ◽  
2009 ◽  
Vol 88 (12) ◽  
pp. 2335-2339 ◽  
Author(s):  
Richelieu Barranco ◽  
Andrés Rojas ◽  
Juan Barraza ◽  
Edward Lester
Keyword(s):  
Kinetic Model ◽  
Char Combustion

A KINETIC MODEL FOR THE CRYSTAL VIOLET MINERALIZATION IN WATER BY THE ELECTRO- FENTON PROCESS

2008 ◽  
Vol 7 (1) ◽  
pp. 9-12 ◽  
Author(s):  
Ilie Siminiceanu ◽  
Carmen-Ionela Alexandru ◽  
Eric Brillas
Keyword(s):  
Kinetic Model ◽  
Crystal Violet ◽  
Fenton Process
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