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Thermal decomposition kinetics of raw and treated olive waste

The pyrolysis characteristic of raw and ultrasound assisted enzyme hydrolysis treated (UAEH) olive waste was investigated using the thermogravimetric analysis at 5, 10, 15 and 20 oC/min in the nitrogen atmosphere. The thermal decomposition was divided into three stages in the thermograph curve, and the thermogravimetric (TG) curve showed the same decomposition trend for two samples. The temperature interval and peak temperature were different for two different samples, and moved to higher temperature with the increase in heating rate. Differential thermogravimetric (DTG) and differential scanning calorimetry (DSC) curves depicted that the structure and composition of samples were changed by UAEH. Meanwhile, the kinetic parameters were calculated by the Kissinger, Kissinger-Akahira-Sunose (KAS), Flynn-Wall-Ozawa (FWO) and Coats-Redfern (CR) methods. For untreated and treated olive waste, the KAS and FWO methods revealed the similar kinetic characteristics for the conversion degree from 0.1 to 0.9, and the average values of activation energy were 201.42 kJ/mol and 162.97 kJ/mol, respectively. The change in activation energy was clearly dependent on the extent of conversion. The CR method suggested the second-order model (F2, f(α)=(1-α)2) could be used to better describe the thermal decomposition mechanism of untreated and treated olive waste. Besides, thermodynamic characteristics of olive waste treated were consistent with that of the untreated sample.
PAPER REVISED: 2018-02-06
PAPER ACCEPTED: 2018-02-06
  1. Huang, X., et al., Pyrolysis kinetics of soybean straw using thermogravimetric analysis. Fuel, 169 (2016), 7, pp. 93-98
  2. Jauhiainen, J., et al., Kinetics of the pyrolysis and combustion of olive oil solid waste. Journal of Analytical and Applied Pyrolysis, 72 (2004), 1, pp. 9-15
  3. Pütün, A. E., et al., Bio-oil from olive oil industry wastes: Pyrolysis of olive residue under different conditions. Fuel Processing Technology, 87 (2005), 1, pp. 25-32
  4. Islam, M. A., et al., Pyrolysis kinetics of raw and hydrothermally carbonized Karanj (Pongamia pinnata) fruit hulls via thermogravimetric analysis. Bioresource Technology, 179 (2015), 5, pp. 227-233
  5. Islam, M. A., et al., Combustion kinetics of hydrochar produced from hydrothermal carbonization of Karanj (Pongamia pinnata) fruit hulls via thermogravimetric analysis. Bioresource Technology, 194 (2015), 20, pp. 14-20
  6. Shin, S., et al., Kinetic analysis using thermogravimetric analysis for nonisothermal pyrolysis of vacuum residue. Journal of Thermal Analysis and Calorimetry, 126 (2016), 2, pp. 933-941
  7. Buratti, C., et al., Thermogravimetric analysis of the behavior of sub-bituminous coal and cellulosic ethanol residue during co-combustion, Bioresource Technology, 186 (2015), 12, pp. 154-162
  8. Bartocci, P., et al., Pyrolysis of pellets made with biomass and glycerol: Kinetic analysis and evolved gas analysis. Biomass and Bioenergy, 97 (2017), 2, pp. 11-19
  9. Xu, Y. L., et al., Investigation of thermodynamic parameters in the pyrolysis conversion of biomass and manure to biochars using thermogravimetric analysis. Bioresource Technology, 146 (2013), 20, pp. 485-493
  10. Sebio-Puñal, T., et al., Thermogravimetric analysis of wood, holocellulose, and lignin from five wood species. Journal of Thermal Analysis and Calorimetry, 109 (2012), 3, pp. 1163-1167
  11. Araújo, M., et al., Phenolic compounds from olive mill wastes: Health effects, analytical approach and application as food antioxidants. Trends in Food Science and Technology, 45 (2015), 2, pp. 200-211
  12. García-Ibañez, P., et al., Thermogravimetric analysis of olive-oil residue in air atmosphere. Fuel Processing Technology, 87 (2006), 2, pp. 103-107
  13. Ounas, A., et al., Pyrolysis of olive residue and sugar cane bagasse: Non-isothermal thermogravimetric kinetic analysis. Bioresource Technology, 102 (2011), 24, pp. 11234-11238
  14. Özveren, U., et al., Investigation of the slow pyrolysis kinetics of olive oil pomace using thermo-gravimetric analysis coupled with mass spectrometry. Biomass & Bioenergy, 58 (2013), 11, pp. 168-179
  15. Rubio-Senent, F., et al., Isolation and identification of minor secoiridoids and phenolic components from thermally treated olive oil by-products. Food Chemistry, 187 (2015), 22, pp. 166-173
  16. Wang, Z. H., et al., Ultrasound-assisted enzyme catalyzed hydrolysis of olive waste and recovery of antioxidant phenolic compounds. Innovative Food Science and Emerging Technologies, 44 (2017), 6, pp. 224-234
  17. Yahiaoui, M., et al., Determination of kinetic parameters of Phlomis bovei de Noé using thermogravimetric analysis. Bioresource Technology, 196 (2015), 22, pp. 441-447
  18. Kissinger, H. E. Reaction kinetics in differential thermal analysis. Analytical Chemistry, 29 (1957), 11, pp. 1702-1706
  19. Garcia-Maraver, A., et al., Determination and comparison of combustion kinetics parameters of agricultural biomass from olive trees. Renewable Energy, 83 (2015), 11, pp. 897-904
  20. Flynn, J. H., et al., A quick, direct method for the determination of activation energy from thermogravimetric data. Journal of Polymer Science Part B: Polymer Letters, 4 (1996), 5, pp. 323-328
  21. Ozawa, T. A new method of analyzing thermogravimetric data. Bulletin of the Chemical Society of Japan, 38 (1965), 11, pp. 1881-1886
  22. Coats, A. W., et al., Kinetic parameters from thermogravimetric data. Nature, 201 (1964), 68, pp. 68-69
  23. Hu, Z. Q., et al., Characteristics and kinetic studies of Hydrilla verticillata pyrolysis via thermogravimetric analysis. Bioresource Technology, 194 (2015), 20, pp. 364-372
  24. Lesnikovich, A. I., et al., A method of finding invariant values of kinetic. Journal of Thermal Analysis, 27 (1983), 1, pp. 89-94
  25. Rahman, Md. R., et al., Differential scanning calorimetry (DSC) and thermogravimetric analysis (TGA) of wood polymer nanocomposites. MATEC Web of Conference, 87 (2017), pp. 03013
  26. Shen, D. K., et al., Kinetic study on thermal decomposition of woods in oxidative environment. Fuel, 88 (2009), 6, pp. 1024-1030
  27. Hu, M., et al., Thermogravimetric study on pyrolysis kinetics of Chlorella pyrenoidosa and bloom-forming cyanobacteria. Bioresource Technology, 177 (2015), 3, pp. 41-50
  28. Ceylan, S., et al., Pyrolysis kinetics of hazelnut husk using thermogravimetric analysis. Bioresource Technology, 156 (2014), 9, pp. 182-188
  29. Ruvolo-Filho, A., et al., Chemical kinetic model and thermodynamic compensation effect of alkaline hydrolysis of waste poly(ethylene terephthalate) in nonaqueous ethylene glycol solution. Industrial and Engineering Chemistry Research, 45 (2006), 24, pp. 7985-7996