Journal
JOURNAL OF APPLIED POLYMER SCIENCE
Volume 139, Issue 35, Pages -Publisher
WILEY
DOI: 10.1002/app.52814
Keywords
catalysts; ionic liquids; kinetics; recycling
Categories
Funding
- Sci-Tech Demonstration & Guidance Project of Qingdao [20-3-4-5 nsh]
- Key Laboratory of Pulp and Paper Science & Technology of Ministry of Education of China [KF202013]
- Open Fund of the Key Laboratory of Multiphase Flow Reaction and Separation Engineering of Shandong Province [2021MFRSE-B01]
- Ministry Co-construction Collaborative Innovation Center of Eco-chemical Engineering [STHGYX2222]
Ask authors/readers for more resources
In this study, an efficient method for the methanolysis of PET using a synthesized ionic liquid as catalyst was developed, resulting in a high yield of DMT. Reaction kinetics and random sampling experiments provided insights into the depolymerization process and highlighted the significance of this method for PET recycling.
With concern to sustainable development, it is necessary to establish a recycling process of polyethylene terephthalate (PET). Methanolysis of PET is promising for chemical recovery of PET and the products are mainly dimethyl terephthalate (DMT) and ethylene glycol (EG), but the conditions of state-of-art depolymerization are severe. Here, we synthesized ionic liquid [HO3S-(CH2)(3)-NEt3]Cl-[ZnCl2](0.67) with Bronsted-Lewis di-acid and used it to efficiently catalyze the methanolysis of PET (m(methanol):m(PET) about 4) at milder temperature of 195 degrees C with yield of DMT about 78.4%. Reaction kinetics was studied and the result indicated the depolymerization of PET was a first-order kinetic reaction with the apparent activation energy of DMT formation about 17.63 kJ mol(-1). Random sampling experiment was also conducted and the results showd that DMT was the product of deep depolymerization of PET and two methanol molecules were needed to form DMT and EG in the depolymerization process. This study provides an efficient method to the recycling use of PET and wais significant to waste recovery and green environment.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available