%0 Journal Article %1 Chen:1995 %A Chen, X. D. %A Chong, L. V. %D 1995 %J Process Safety and Environmental Protection (Transactions of the Institution of Chemical Engineers, Part B) %K Exothermic Experimental Laboratory Numerical Porous Sawdust Self Theoretical Unsteady crossing heating material modelling point reaction simulation state study temperature; test transient %N 2 %P 101--107 %T Some characteristics of transient self-heating inside an exothermically reactive porous solid slab %V 73 %X We report the results of numerical simulations and laboratory investigations carried out to explore the characteristics of the transient self-heating process. Various initial and boundary conditions were considered. It was demonstrated that a characteristic temperature, defined as the crossing-point temperature, does not change (to within ±0.01°C) for the same exothermicity, activation energy, thermal properties, half-thickness and boundary temperature when only the initial uniform temperature is varied. This initial temperature must be lower than the critical ignition boundary temperature and the boundary temperature must not be supercritical to lead to a periphery ignition. This crossing-point temperature may be used as a physicochemical property to indicate the propensity of a solid material to self-heat. The calculations also suggest a linear temperature dependence of the heat conduction term in the energy balance applied at the symmetry of a slab for a certain temperature range, from a value smaller than the crossing-point temperature to a value just before ignition. This concept of a crossing-point temperature was confirmed by experiments carried out on a wood sawdust

@article{Chen:1995, abstract = {We report the results of numerical simulations and laboratory investigations carried out to explore the characteristics of the transient self-heating process. Various initial and boundary conditions were considered. It was demonstrated that a characteristic temperature, defined as the crossing-point temperature, does not change (to within ±0.01°C) for the same exothermicity, activation energy, thermal properties, half-thickness and boundary temperature when only the initial uniform temperature is varied. This initial temperature must be lower than the critical ignition boundary temperature and the boundary temperature must not be supercritical to lead to a periphery ignition. This crossing-point temperature may be used as a physicochemical property to indicate the propensity of a solid material to self-heat. The calculations also suggest a linear temperature dependence of the heat conduction term in the energy balance applied at the symmetry of a slab for a certain temperature range, from a value smaller than the crossing-point temperature to a value just before ignition. This concept of a crossing-point temperature was confirmed by experiments carried out on a wood sawdust}, added-at = {2010-01-05T23:12:10.000+0100}, author = {Chen, X. D. and Chong, L. V.}, biburl = {https://www.bibsonomy.org/bibtex/20b389f5f15621f9ca206ceb5693736dd/sjp}, interhash = {bbbe8058b2bdfb82fdbe01d8eaed50c2}, intrahash = {0b389f5f15621f9ca206ceb5693736dd}, journal = {Process Safety and Environmental Protection (Transactions of the Institution of Chemical Engineers, Part B)}, keywords = {Exothermic Experimental Laboratory Numerical Porous Sawdust Self Theoretical Unsteady crossing heating material modelling point reaction simulation state study temperature; test transient}, number = 2, pages = {101--107}, timestamp = {2010-01-19T17:39:44.000+0100}, title = {Some characteristics of transient self-heating inside an exothermically reactive porous solid slab}, volume = 73, year = 1995 }