International Science Index


10011057

Kinetic Parameter Estimation from Thermogravimetry and Microscale Combustion Calorimetry

Abstract:

Flammability analysis of extruded polystyrene (XPS) has become crucial due to its utilization as insulation material for energy efficient buildings. Using the Kissinger-Akahira-Sunose and Flynn-Wall-Ozawa methods, the degradation kinetics of two pure XPS from the local market, red and grey ones, were obtained from the results of thermogravity analysis (TG) and microscale combustion calorimetry (MCC) experiments performed under the same heating rates. From the experiments, it was discovered that red XPS released more heat than grey XPS and both materials showed two mass loss stages. Consequently, the kinetic parameters for red XPS were higher than grey XPS. A comparative evaluation of activation energies from MCC and TG showed an insignificant degree of deviation signifying an equivalent apparent activation energy from both methods. However, different activation energy profiles as a result of the different chemical pathways were presented when the dependencies of the activation energies on extent of conversion for TG and MCC were compared.

References:
[1] Keattch, CJ, Dollimore D (2000). An introduction to thermogravimetry. Heyden.
[2] ASTM E1641-16 (2016), Standard Test Method for Decomposition Kinetics by Thermogravimetry Using the Ozawa/Flynn/Wall Method, ASTM International, West Conshohocken, PA.
[3] Prime RB, Bair HE, Vyazovkin S, Gallagher PK, Riga A (2009). Thermogravimetric analysis (TG). Thermal analysis of polymers: Fundamentals and applications. 241-317.
[4] Kim, E., & Dembsey, N. (2012). Engineering guide for estimating material pyrolysis properties for fire modeling. Project Final Report, 382.
[5] Matala A, Lautenberger C, Hostikka S (2012). Generalized direct method for pyrolysis kinetic parameter estimation and comparison to existing methods. Journal of fire sciences. 30(4):339-56.
[6] Jiang L, Zhang D, Li M, He JJ, Gao ZH, Zhou Y, Sun JH. (2018). Pyrolytic behavior of waste extruded polystyrene and rigid polyurethane by multi kinetics methods and Py-GC/MS. Fuel, 222, 11-20.
[7] Jiao LL, Sun JH (2014). A thermal degradation study of insulation materials extruded polystyrene. Procedia Engineering, 71, 622-628.
[8] Mishra RK, Mohanty K (2018). Pyrolysis kinetics and thermal behavior of waste sawdust biomass using thermogravimetric analysis. Bioresource technology. 251:63-74.
[9] Lyon, R. E., & Walters, R. N. (1999). U.S. Patent No. 5,981,290. Washington, DC: U.S. Patent and Trademark Office.
[10] Walters RN, Lyon RE (2001), Heat release capacity. Fire & Materials Conference, San Francisco, CA.
[11] Lyon RE, Walters RN (2004), Pyrolysis combustion flow calorimetry. Journal of Analytical and Applied Pyrolysis. 71(1):27-46.
[12] Walters R.N, Lyon R.E (1997), Microscale combustion calorimeter for determining flammability parameters of materials. Evolving Technologies for the Competitive Edge. 42: 1335-1344.
[13] Asante-Okyere, S., Xu, Q., Mensah, R. A., Jin, C., & Ziggah, Y. Y. (2018). Generalized regression and feed forward back propagation neural networks in modelling flammability characteristics of polymethyl methacrylate (PMMA). Thermochimica Acta, 667, 79-92.
[14] Mensah, R. A., Xu, Q., Asante-Okyere, S., Jin, C., & Bentum-Micah, G. Correlation analysis of cone calorimetry and microscale combustion calorimetry experiments. Journal of Thermal Analysis and Calorimetry, 1-11.
[15] Snegirev AY, Talalov VA, Stepanov VV, Harris JN (2012). Formal kinetics of polystyrene pyrolysis in non-oxidizing atmosphere. Thermochimica acta. 548:17-26.
[16] Snegirev, A. Y. (2014). Generalized approach to model pyrolysis of flammable materials. Thermochimica Acta, 590, 242-250.
[17] Standard Test Method for Determining Flammability Characteristics of Plastic’s and Other Solid Materials Using Microscale Combustion Calorimetry. ASTM D7309-13.
[18] Lyon RE, Walters RN (2004). Pyrolysis combustion flow calorimetry. Journal of Analytical and Applied Pyrolysis. 71(1):27-46.
[19] Brems A, Baeyens J, Beerlandt J, Dewil R (2011). Thermogravimetric pyrolysis of waste polyethylene-terephthalate and polystyrene: A critical assessment of kinetics modelling. Resources, Conservation and Recycling. 55(8):772-81.
[20] Logan SR. (1982). The origin and status of the Arrhenius equation. Journal of Chemical Education, 59(4), 279.
[21] Chen Y, Wang Q (2007) Thermal oxidative degradation kinetics of flame-retarded polypropylene with intumescent flame-retardant master batches in situ prepared in twin-screw extruder. Polymer Degradation and Stability. 92:280–91.
[22] Bianchi O, Oliveira R, Fioro R, Martins J, Zattera A, Canto L (2008). Assessment of Avrami, Ozawa and Avrami–Ozawa equations for determination of EVA cross-linking kinetics from DSC measurements. Polymer Testing. 27:722–9.
[23] Lyon RE, Filipczak R, Walters RN, Crowley S, Stoliarov SI (2007). Thermal Analysis of Polymer Flammability, Report No. DOT/FAA/AR-07/2.
[24] Akahira T, Sunose T (1971). Method of determining activation deterioration constant of electrical insulating materials. Res Rep Chiba Inst Technol (Sci Technol). 16:22–31.