Oxidative pyrolysis of solid fuels

Senneca, Osvalda; Chirone, Riccardo; Salatino, Piero

doi:10.1016/j.jaap.2003.12.006

Cited by 79 publications

(46 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Senneca et al [108] determined the constants m and n for PE and PET. Jun et al [112] used Equation 2.26 to study the thermooxidative decomposition of polypropylene.…”

Section: Thermal and Thermooxidative Stabilitymentioning

confidence: 99%

Generalized pyrolysis model for combustible solids

Lautenberger

Fernandez-Pello

2009

Fire Safety Journal

302

259

View full text Add to dashboard Cite

This dissertation presents the derivation, numerical implementation, and verification/validation of a generalized model that can be used to simulate the pyrolysis, gasification, and burning of a wide range of solid fuels encountered in fires. The model can be applied to noncharring and charring solids, composites, intumescent coatings, and smolder in porous media. Care is taken to make the model as general as possible, allowing the user to determine the appropriate level of complexity to include in a simulation. The model considers a user-specified number of gas phase and condensed phase species, each having its own temperature-dependent thermophysical properties.Any number of heterogeneous (gas-solid) or homogeneous (solid-solid or gas-gas) reactions can be specified. Both in-depth radiation transfer through semi-transparent media and radiation transport across pores are considered. Volume change (surface regression or swelling/intumescence) is handled by allowing the size of grid points to change as dictated by mass conservation. All volatiles generated inside the solid escape to the ambient with no resistance to mass transfer unless a pressure solver is invoked; the resultant flow of volatiles is then calculated according to Darcy's law. A gas phase 2 convective-diffusive solver can be invoked to determine the composition of the volatiles.Oxidative pyrolysis is simulated by modeling diffusion of oxygen from the ambient into the pyrolyzing solid where it may participate in reactions. Consequently, the mass flux and composition of volatiles escaping from the solid can be calculated. To aid in determining the required input parameters, the model is coupled to a genetic algorithm that can be used to estimate the required input parameters from bench-scale fire tests or thermogravimetric analysis.

show abstract

“…Senneca et al [108] determined the constants m and n for PE and PET. Jun et al [112] used Equation 2.26 to study the thermooxidative decomposition of polypropylene.…”

Section: Thermal and Thermooxidative Stabilitymentioning

confidence: 99%

Generalized pyrolysis model for combustible solids

Lautenberger

Fernandez-Pello

2009

Fire Safety Journal

302

259

View full text Add to dashboard Cite

show abstract

“…2B. Completely different results have been obtained for coals [2] which, upon oxidative pyrolysis experience a single stage of weight loss with peak at quite higher temperatures (around 670°C at 5°C/min), according to the reaction path of reported in fig. 2A.…”

Section: Tg-ip/tg-op/tg-c Results For Typical Biomassmentioning

confidence: 94%

“…The presence of metals and inorganic matter may produce unusual effects in terms of both energetic and environmental performance. It has been shown for a variety of solid fuels that the process and reactor design, in particular the temperature level and the inert/oxidizing nature of the gaseous atmosphere, determine the reaction path and affects severely the fate of the organic matter [1][2] but is also expected to determine the fate of inorganic matter and metals. As far as the organic content is concerned, upon heating under inert atmosphere this undergoes a combination of thermal cracking and condensation reactions, called pyrolysis, producing a gas, a liquid (tar) and a solid product (char).…”

Section: Introductionmentioning

confidence: 99%

Characterization of Biomass as Non Conventional Fuels by Thermal Techniques

Senneca¹

2011

Progress in Biomass and Bioenergy Production

Self Cite

View full text Add to dashboard Cite

“…DTG curves of sewage sludge can depict its pyrolysis-combustion reaction with simple mathematical models, and the impacts of temperature and oxygen concentration on the drying and oxidization-combustion of sludge can be expressed by Arrhenius equation and power law [9][10][11][12].…”

Section: Nonlinear Kinetic Models At Different Heating Rates and Analmentioning

confidence: 99%

Thermogravimetric Experiment and Dynamic Analysis on Municipal Sewage Sludge Combustion

Zhang¹,

Xue²,

Qian³

2017

dteees

View full text Add to dashboard Cite

Abstract. The drying and combustion characteristics of sludge may be obtained by the thermogravimetric experiment, then further analysis of their mechanism will provides the basis for the energy utilization of sludge. In this paper, the drying stage, the flammable stage and the nonflammable stage of municipal sludge were studied by the thermogravimetric experiment methodology. The results show the drying stage consists of five stages: preheating stage, rapid weight loss stage, constant-rate weight loss stage, decelerating weight loss stage I and decelerating weight loss stage II. The kinetic process for the drying and for the combustion of sewage sludge should be expressed by phase interface reaction mechanism function g(a)=1-(1-a)n and chemical reaction equation f(a)=(1-a)n respectively. Then kinetic parameter calculation for these three stages of municipal sludge were done. Kinetic parameters reveal that activation energy decreases in the sequence of non-flammable stage, flammable stage and drying stage, and when raising the heating rate, the activation energy increases significantly in flammable stage while nearly remains unchanged in non-flammable stage.

show abstract

Oxidative pyrolysis of solid fuels

Cited by 79 publications

References 37 publications

Generalized pyrolysis model for combustible solids

Generalized pyrolysis model for combustible solids

Characterization of Biomass as Non Conventional Fuels by Thermal Techniques

Thermogravimetric Experiment and Dynamic Analysis on Municipal Sewage Sludge Combustion

Contact Info

Product

Resources

About