Pyrolysis of corrugated cardboard in inert and oxidative environments

Abstract The thermal decomposition of corrugated cardboard has been studied in inert and oxidative (non-flaming) atmospheres under a range of radiant heat fluxes relevant to fire conditions in warehouse storage applications. Experiments were performed in a Fire Propagation Apparatus (FPA) on double-wall corrugated cardboard at heat flux levels of 20, 60, and 100 kW/m 2 . Pyrolysis data comprised of gasification rates and surface temperatures were collected for tests carried out in ambient atmospheres consisting of 100% N 2 as well as 2%, 6%, 8%, 10%, and 14% (mol) O 2 in balance nitrogen. It is shown that the presence of oxygen has an appreciable effect at all heat flux levels; however, it is most prevalent at low heat fluxes. Analyses are presented in an effort to gain further understanding of char oxidation processes. Results show that the maximum heat evolved in oxidative environments is relatively constant and similar for all conditions tested. Furthermore this heat release rate is found to be comparatively small relative to the high radiant fluxes tested; this explains the experimentally observed behavior. This study provides a comprehensive dataset that may be used in conjunction with approaches recently adopted in the fire community in which optimization procedures are employed to generate material properties for pyrolysis models used in CFD fire simulations.

[1]  Colomba Di Blasi,et al.  Modeling chemical and physical processes of wood and biomass pyrolysis , 2008 .

[2]  A. Savitzky,et al.  Smoothing and Differentiation of Data by Simplified Least Squares Procedures. , 1964 .

[3]  Clayton Huggett,et al.  Estimation of rate of heat release by means of oxygen consumption measurements , 1980 .

[4]  T. Kashiwagi,et al.  Effects of external radiant flux and ambient oxygen concentration on nonflaming gasification rates and evolved products of white pine , 1987 .

[5]  T. Ohlemiller.  Modeling of smoldering combustion propagation , 1985 .

[6]  Behdad Moghtaderi,et al.  The state‐of‐the‐art in pyrolysis modelling of lignocellulosic solid fuels , 2006 .

[7]  Martin A. Reno,et al.  Coefficients for calculating thermodynamic and transport properties of individual species , 1993 .

[8]  C. Fernandez-Pello,et al.  Generalized pyrolysis model for combustible solids , 2007 .

[9]  S. Stoliarov,et al.  Prediction of the burning rates of non-charring polymers , 2009 .

[10]  J. L. De Ris,et al.  Effect of Moisture on Ignition Time of Cellulosic Materials , 2008 .

[11]  D. Frank-Kamenetskii,et al.  Diffusion and heat exchange in chemical kinetics , 1955 .

[12]  M. Bromba,et al.  Application hints for Savitzky-Golay digital smoothing filters , 1981 .

[13]  John L. de Ris,et al.  A sample holder for determining material properties , 2000 .

[14]  M. M. Khan,et al.  Operator Independent Ignition Measurements , 2005 .

[15]  Dougal Drysdale,et al.  Numerical modelling of early flame spread in warehouse fires , 1995 .

[16]  Guillermo Rein,et al.  The application of a genetic algorithm to estimate material properties for fire modeling from bench-scale fire test data , 2006 .

[17]  M. Chaos,et al.  Evaluation of optimization schemes and determination of solid fuel properties for CFD fire models using bench-scale pyrolysis tests , 2011 .

[18]  Michael Försth,et al.  Absorptivity and its dependence on heat source temperature and degree of thermal breakdown , 2011 .

[19]  J. Staggs.  Savitzky-Golay smoothing and numerical differentiation of cone calorimeter mass data , 2005 .

[20]  A. Gupta,et al.  PYROLYSIS OF PAPER AND CARDBOARD IN INERT AND OXIDATIVE ENVIRONMENTS , 1999 .