Welcome to Biomass Chemical Engineering,

Biomass Chemical Engineering ›› 2021, Vol. 55 ›› Issue (5): 1-7.doi: 10.3969/j.issn.1673-5854.2021.05.001

• Research Report • Previous Articles     Next Articles

Co-pyrolysis Characteristics and Kinetics of PET and Wheat Straw

Bingtao HU1, Zhijian LI2,3,*()   

  1. 1. School of Human Settlements and Civil Engineering, Xi'an Jiaotong University, Xi'an 710049, China
    2. College of Bioresources Chemical and Materials Enginerring, Shaanxi University of Science & Technology, Xi'an 710021, China
    3. Key Laboratory of Paper Technology and Specialty Paper Development of Shaanxi Province, Xi'an 710021, China
  • Received:2020-09-29 Online:2021-09-30 Published:2021-09-13
  • Contact: Zhijian LI E-mail:lizj@sust.edu.cn


Pyrolytic behaviors, main pyrolytic products, synergistic effect and kinetics of Guanzhong wheat straw, polyethylene Terephthalate(PET) sample and its blends(mass ratio 1:1) were investigated by TG-FTIR system at heating rate of 20 K/min. The results demonstrated that the initial pyrolysis temperature of PET sample was 375℃ and the maximum weight loss rate(62.87%) occured at the temperature of 454.9℃ and the residual amount was about 19.42%.The weight loss rates of the mixture were 22.9% and 73.9% at the two weight loss peak(339.9 and 444℃), respectively. At that time, the final prolysis residual amount was about 23.52%. There were two synergistic effects(339.9 and 444℃) in the process of co-pyrolysis which enhanced the amount of pyrolysis products of CO, CH4, aromatics, acids, ketones, aldehydes, alcohols, alkanes, phenols and ethers. The heating value and fuel quality of the raw material were enhanced a lot by the co-pyrolysis process. The apparent activation energy of PET in higher than that of wheat straw(86.5 kJ/mol). And the apparent activation energies of the mixture calculated by Coats-Redfern method were 53.6 kJ/mol at low pyrolysis temperature region(258-363℃) and 81.6 kJ/mol at the high pyrolysis temperature region(393-463℃).

Key words: Guanzhong wheat straw, co-pyrolysis, synergistic effect, TG-FTIR, pyrolysis kinetics

CLC Number: