PMID- 33142917
OWN - NLM
STAT- PubMed-not-MEDLINE
LR  - 20201114
IS  - 1996-1944 (Print)
IS  - 1996-1944 (Electronic)
IS  - 1996-1944 (Linking)
VI  - 13
IP  - 21
DP  - 2020 Oct 31
TI  - Pyrolysis of Mixed Plastic Waste: I. Kinetic Study.
LID - 10.3390/ma13214912 [doi]
LID - 4912
AB  - Plastic wastes have become one of the biggest global environmental issues and 
      thus recycling such massive quantities is targeted. Low-density polyethylene 
      (LDPE), high-density polyethylene (HDPE), polypropylene (PP), and polystyrene 
      (PS) are considered among the main types of plastic wastes. Since pyrolysis is 
      one of the most promising recycling techniques, this work aims to build knowledge 
      on the co-pyrolysis of mixed polymers using two model-fitting (Criado and 
      Coats-Redfern) methods. Seventeen co-pyrolysis tests using a thermogravimetric 
      analyzer (TGA) at 60 K/min for different mixed compositions of LDPE, HDPE, PP, 
      and PS were conducted. It was observed that the pyrolysis of the pure polymer 
      samples occurs at different temperature ranges in the following order: PS < PP < 
      LDPE < HDPE. However, compared to pure polymer samples, the co-pyrolysis of 
      all-polymer mixtures was delayed. In addition, the synergistic effect on the 
      co-pyrolysis of polymer blends was reported. The Master plot of the Criado model 
      was used to determine the most suitable reaction mechanism. Then, the 
      Coats-Redfern model was used to efficiently obtain the kinetic parameters (R(2) >/= 
      97.83%) and the obtained values of the activation energy of different polymer 
      blends were ranging from 104 to 260 kJ/mol. Furthermore, the most controlling 
      reaction mechanisms were in the following orders: First order reaction (F1), 
      Contracting sphere (R3), and then Contracting cylinder (R2).
FAU - Dubdub, Ibrahim
AU  - Dubdub I
AUID- ORCID: 0000-0002-2773-865X
AD  - Chemical Engineering Department, King Faisal University, P.O. Box 380, Al-Ahsa 
      31982, Saudi Arabia.
FAU - Al-Yaari, Mohammed
AU  - Al-Yaari M
AUID- ORCID: 0000-0002-2717-8736
AD  - Chemical Engineering Department, King Faisal University, P.O. Box 380, Al-Ahsa 
      31982, Saudi Arabia.
LA  - eng
GR  - IFT20126/Deputyship for Research & Innovation, Ministry of Education, Saudi 
      Arabia/
PT  - Journal Article
DEP - 20201031
PL  - Switzerland
TA  - Materials (Basel)
JT  - Materials (Basel, Switzerland)
JID - 101555929
PMC - PMC7663054
OTO - NOTNLM
OT  - Coats-Redfern model
OT  - Criado model
OT  - kinetics
OT  - mixed plastic waste
OT  - pyrolysis
OT  - recycling
OT  - thermogravimetric analysis (TGA)
COIS- The authors declare no conflict of interest.
EDAT- 2020/11/05 06:00
MHDA- 2020/11/05 06:01
PMCR- 2020/10/31
CRDT- 2020/11/04 01:02
PHST- 2020/09/27 00:00 [received]
PHST- 2020/10/29 00:00 [revised]
PHST- 2020/10/30 00:00 [accepted]
PHST- 2020/11/04 01:02 [entrez]
PHST- 2020/11/05 06:00 [pubmed]
PHST- 2020/11/05 06:01 [medline]
PHST- 2020/10/31 00:00 [pmc-release]
AID - ma13214912 [pii]
AID - materials-13-04912 [pii]
AID - 10.3390/ma13214912 [doi]
PST - epublish
SO  - Materials (Basel). 2020 Oct 31;13(21):4912. doi: 10.3390/ma13214912.