Thermogravimetric analysis of the co-combustion of coal and polyvinyl chloride

Autoři: Hongbin Gao aff001;  Jingkuan Li aff002
Působiště autorů: Automation Department, Shanxi University, Taiyuan, PR China aff001;  Power Engineering Department, Shanxi University, Taiyuan, PR China aff002
Vyšlo v časopise: PLoS ONE 14(10)
Kategorie: Research Article
doi: 10.1371/journal.pone.0224401


Coal gangue has the shortcomings of low calorific value and refractory burnout, while polyvinyl chloride has the advantages of a long combustion process and high calorific value. In order to make up for these shortcomings of coal gangue, the possibility of a treatment method based on co-combustion of coal gangue with polyvinyl chloride, which can be centrally recovered from municipal solid waste, is proposed. In order to analyze the combustion effect of a mixture of these two substances, experimental samples were prepared by mixing these two substances in three different ratios, and they were tested by thermogravimetric analysis. The experimental results were compared, analyzed and evaluated. The effects of the proportion of polyvinyl chloride in the mixture on the temperature parameters, activation energy, and interaction during co-combustion were analyzed. In order to analyze the interaction during co-combustion of the two, a coupling analysis method for mixed combustion is presented, and the effectiveness of this method is verified by comparing with the correlation analysis results of co-combustion. The results show that co-combustion can mitigate the ignition difficulty and burnout of coal gangue. When the proportion of polyvinyl chloride in the mixture was increased from 20% to 80%, the maximum weightlessness rate of the first stage rapidly increased from 4.5%/min to 15.6%/min; however, that of the second stage slowly increased from 3.7%/min to 4.2%/min. A 20% proportion of polyvinyl chloride showed the most significant promotion of co-combustion, with a maximum coupling coefficient of 0.00318, which was 1.11 and 1.35 times greater than that of 50% and 80% proportions, respectively. Co-combustion can reduce the activation energy of coal gangue during the initial and end stages. Therefore, co-combustion is helpful to improve the problems of low calorific value and refractory burnout of coal gangue.

Klíčová slova:

Coal – Curve fitting – Polyvinyl chloride – Psychological stress – Combustion – Weightlessness – Activation energy – Pyrolysis


1. Bai C, Xu Z, Li G. Research progress of nano TiO2 loaded diatomite and modification. Multipurp. Util. Miner. Resour. 2016;12:1–8. doi: 10.3969/j.issn.1000-6532.2016.06.002

2. Fan Z. Research of renewable gangue resources approaches. Coal Technol. 2016;331–332. doi: 10.13301/j.cnki.ct.2016.11.132

3. Liang S. Discussion on technology of mixing coal gangue in circulating fluidized bed boiler. Coal Engineering. 2010;7:84–86. doi: 10.11799/ce201705056

4. Zhang Y, Nakano J, Liu L. Co-combustion and emission characteristics of coal gangue and low-quality coal. Journal of Thermal Analysis & Calorimetry. 2015;120:1883–1892. doi: 10.1007/s10973-015-4477-4

5. Dai R.; Song J.; Zhang X. Study of the combustion characteristics of coal gangue mixed with coal from Huaibei mining area. Journal of Anhui Institute of Architecture & Indusry. 2013;21:41–45. doi: 10.3969/j.issn.1006-4540.2013.06.010

6. He Y.; Chang C.; Fang S. Research process of co-pyrolysis technology of coal and biomass. Renewable Energy Resources. 2018;36:159–166. doi: 10.3969/j.issn.1671-5292.2018.02.001

7. Chen W.; Wang F.; Kanhar A. H. Sludge acts as a catalyst for coal during the co-combustion process investigated by thermogravimetric analysis. Energies. 2017;12:1993. doi: 10.3390/en10121993

8. Yang P. Experiment research on co-combustion of cangue and coal-bed gas in CFB. Chongqing:Chongqing University. 2010.

9. Li D.; Zheng G.; Zhang G. Theory and practice of the gas coal co-firing technology for traveling chain grate boilers. Journal of Power Engineering. 2006;26:59–64. doi: 10.3969/j.issn.1674-7607.2006.01.012

10. Zhang R.; Wu H.; Zhao X. Effect on heat boiler exchange of blast-furnace gas in CFB boilers. Energy technology. 2009;04:250–252.

11. Li Q. Numerical stimulation of flow characteristics of coal gangue and coal bed methane in CFB. Chongqing: Chongqing University. 2008.

12. Wang J. Numerical simulation and experimental research on co-combustion characteristics of low calorific value coal bed methane and coal gangue in circulating fluidized bed. Chongqing: Chongqing University. 2010.

13. Ren J.; Xie C.; Xuan G. Combustion characteristics of coal gangue under an atmosphere of coal mine methane. Energy fuels. 2014;28:3688–3695. doi: 10.1021/ef500446j

14. Kazagic A.; Hodzic N.; Metovic S. Co-combustion of low-rank coal with woody biomass and miscanthus: an experimental study. Energies. 2018;11:601–610. doi: 10.3390/en11030601

15. Wang Y. Research on technology of pre-dryed sludge and coal gangue mixed combustion. Tang Shan:HeBei United University. 2014.

16. Li X.; Zhao R.; Qin J. Co-combustion characteristics of municipal solid waste with coal gangue and its HCl emission. Journal of Fuel Chemistry and Technology. 2016;44:1304–1309. doi: 10.3969/j.issn.0253-2409.2016.11.004

17. Meng F.; Yu J.; Tahmasebi A. Pyrolysis and combustion behavior of coal gangue in O2/CO2 and O2/N2 mixtures using thermogravimetric analysis and a drop tube furnace. Energy fuels. 2013;27:2923–2932. doi: 10.1021/ef400411w

18. Zhang Y.; Li J.; Cheng F. Study of the combustion behavior and kinetics of different types of coal gangue. COMBUST EXPLO SHOCK+. 2015;51:670–677. doi: 10.1134/S0010508215060088

19. Kan R.; Kaosol T.; Tekasakul P. Determination of particle-bound polycyclic aromatic hydrocarbons emitted from co-pelletization combustion of lignite and rubber wood sawdust. Thailand: 2nd International CFDRI 2017. doi: 10.1088/1757-899X/243/1/012045

20. Xiao L. S; Lin T; Chen S.H.; Zhang G. Q.; Ye Z. L.; Yu Z. W. Characterizing urban household waste generation and metabolism considering community stratification in a rapid urbanizing area of china. Plos one. 2015; 12. doi: 10.1371/journal.pone.0145405 26690056

21. Jale Y.; Mau A.; Sakata Y. The effect of red mud on the liquefaction of waste plastics in heavy vacuum gas Oil. Energy fuels. 2011;15:163–169. doi: 10.1021/ef0001080

22. Sun S; Gao Q.; Tian Y. Research on pyrolysis process of phenolic Foam by TG-FTIR-MS. Journal of building materials. 2014;17:246–249. doi: 10.3969/j.issn.1007-9629.2014.02.011

23. Song E.; Kim D.; Jeong C.J.; Kim D.Y. A kinetic study on combustible coastal debris pyrolysis via thermogravimetric analysis. Energies. 2019;12. doi: 10.3390/en12050836

24. Zeng G.; Ma X.; Wu J. Pyrolysis characteristics and kinetic analysis of plastic waste from ships. Chinese Journal of Environmental Engineering. 2014;9:4001–4006.

25. Zhao J.; Wei X.; Li T. Behavior of alkali metals in fly ash during waste heat recovery for municipal solid waste incineration. Energy fuels. 2018;32:4417–4423. doi: 10.1021/acs.energyfuels.7b03001

26. Iniguez M. E.; Conesa J. A.; Fullana A. Effect of sodium chloride and thiourea on pollutant formation during combustion of plastics. Energies. 2018;11. doi: 10.3390/en11071797

27. Stanislav H.; Kumagai S.; Molnár V. Pyrolysis gases produced from individual and mixed PE, PP, PS, PVC and PET-Part II: Fuel characteristics. Fuel. 2018;221:361–373. doi: 10.1016/j.fuel.2018.02.075

28. Phetyim N.; Pisa-Art S. Prototype co-Pyrolysis of used lubricant oil and mixed plastic waste to produce a diesel-like fuel. Energies. 2018;11. doi: 10.3390/en11071797

29. Xu Y.; Chen Y.; Hua D. Co-pyrolysis of biomass and waste plastic for biofuel in fixed-bed reactor. CHEM IND ENG PROG. 2013;32:563–569. doi: 10.3969/j.issn.1000-6613.2013.03.012

30. Chung M. H.; Park J. C. An experimental study on the thermal performance of phase-change material and wood-plastic composites for building roofs. Energies. 2017;195. doi: 10.3390/en10020195

31. Song Z.; Zhong Z.; Zhang B. Experimental study on catalytic co-pyrolysis of corn stalk and polypropylene. J. Zhejiang Univ. (Engineering Science). 2016;50:333–340. doi: 10.3785/j.issn.1008-973X.2016.02.019

32. Lin X.; Yang Gang.; Wang F. Thermogravimetric study on the inter effect of co-pyrolysis of paper and plastic solid wastes. E E. 2016;34:95–99. doi: 10.13205/j.hjgc.201609021

33. Mohammed J. K.; Ashfaque A. C.; Mohammad G. R. Pyrolysis of municipal green waste: a modelling, simulation and experimental analysis. Energies. 2015;8:7522–7541. doi: 10.3390/en8087522

34. Tang Y.; Wang X.; Wang D. Effect of starch and PVC interactions on characteristics of pyrolysis tar. CIESC J. 2017;68:2049–2056. doi: 10.11949/j.issn.0438-1157.20161641

35. Oisik D.; Bhattacharyya D.; David H. Mechanical and flammability characterisations of biochar /polypropylene biocomposites. Composites Part B: Engineering. 2016;106:120–128. doi: 10.1016/j.compositesb.2016.09.020

36. Filippis P.D.; Caprariis B.D.; Scarsella M.; Verdone N. Double distribution activation energy model as suitable tool in explaining biomass and coal pyrolysis behavior. Energies. 2015;83:1730–1744. doi: 10.3390/en8031730

37. Jong W D; Pirone A.; Wojtowicz M. A. Pyrolysis of miscanthus giganteus and wood pellets: TG-FTIR analysis and reaction kinetics. Fuel. 2003;82:1139–1147. doi: 10.1016/S0016-2361(02)00419-2

38. Miura K. A new and simple method to estimate f (E) and k0 (E) in the distributed activation energy model from three sets of experimental data. Energy fuels. 1995;9:302–307. doi: 10.1021/ef00050a014

39. Nourelhouda B.; Lokmane A.; Mustapha C.; Abdeslam-Hassen M.; Chetna M.; Taouk B. Combustion of flax shives, beech wood, pure woody pseudo-components and their chars: a thermal and kinetic study. Energies. 2018;118. doi: 10.3390/en11082146

40. Li K.; Shao W. L.; Yuan G.; Lei J. X.; Lin S.; Piyarat W.; Yang Y. H.; Wang J. Y. Investigation into the catalytic activity of microporous and mesoporous catalysts in the pyrolysis of waste polyethylene and polypropylene mixture. Energies. 2016;431. doi: 10.3390/en9060431

41. Ding L.; Zhang Y.; Wang Z. Interaction and its induced inhibiting or synergistic effects during co-gasification of coal char and biomass char. BIORESOURCE TECHNOL. 2014;173:11–20. doi: 10.1016/j.biortech.2014.09.007 25280109

42. Liu X.; Chen M. Q.; Wei Y. H. Combustion behavior of corncob/bituminous coal and hardwood/ bituminous coal. Renewable Energy. 2015;81:355–365. doi: 10.1016/j.renene.2015.03.021

43. Avila C.; Wu T. Estimation the spontaneous combustion potential of coals using thermogravimetric analysis. Energy fuels. 2014;28:1765–1773. doi: 10.1021/ef402119f

44. Peng B.; Li X. Release and transformation characteristics of modes of occurrence of chlorine in coal gangue during combustion. Energy fuels. 2018;32:9926–9933. doi: 10.1021/acs.energyfuels.8b02019

45. Wen X.; Zhao J.; Zeng F. Distribution of Polycyclic Aromatic Hydrocarbons in Coal Gangue and Emitted Gas with Low-Temperature Spontaneous Combustion in Situ. Energy fuels. 2019;33:176–184. doi: 10.1021/acs.energyfuels.8b03493

46. Zhao Y. P.; Hu H. Q.; Jin L. J. Pyrolysis behavior of vitrinite and inertinite from Chinese Pingshuo coal by TG–MS and in a fixed bed reactor. FUEL PROCESSTECHNOL. 2011;92:780–786. doi: 10.1016/j.fuproc.2010.09.005

47. Miranda R.; Yang J.; Roy C. Vacuum pyrolysis of PVC I. Kinetic study. Polym. Eng. Sci. 1999;64:127–144. doi: 10.1016/S0141-3910(98)00186-4

48. Wang H. M.; You C. F. Experimental investigation into the spontaneous ignition behavior of upgraded coal products. Energy fuels. 2014;28:2267–2271. doi: 10.1021/ef402569s

49. Zhang H.; Zhou M.; Wang C. Influence of mineral matters on the calorific value of anthracite under oxygen bomb conditions. Energy fuels. 2004;18:1883–1887. doi: 10.1021/ef049898u

Článek vyšel v časopise


2019 Číslo 10