Effect of aluminum leaching pretreatment on catalytic pyrolysis of metallised food packaging plastics and its linear and nonlinear kinetic behaviour.
Sci Total Environ
; 844: 157150, 2022 Oct 20.
Article
in En
| MEDLINE
| ID: mdl-35803432
ABSTRACT
This research aims to study the effect of aluminum (Al) leaching pre-treatment on the catalytic pyrolysis of metallised food packaging plastics waste (MFPW). The experiments started with removal of Al from MFPW using leaching process to prepare Al-free mixed plastic waste (MPW). The catalytic pyrolysis of MPW over ZSM-5 zeolite catalyst was carried out using thermogravimetric (TG) analysis coupled with FTIR, while GC-MS was used to observe the compounds of the volatile products. The catalytic pyrolysis kinetic behaviour of MPW was studied using the linear and nonlinear isoconversional approaches. The elemental and proximate results showed that MPW is very rich in carbon elements (79â¯%) and volatile content (99â¯%). The TG results showed that MPW and ZSM/MPW were fully decomposed in the range of 376-496⯰C without any presence of char. Based on TG-FTIR analysis, methane and carboxylic acid residue were the main groups of the synthesized volatile products, whereas nitrous oxide, 1-Butanol, 1-Propene, acetic acid, and formic acid were the major GC compounds. In case of ZSM/MPW, carbon dioxide and acetic acid were the major GC compounds at 5-25⯰C/min, triphenylphosphine oxide and Phosphine oxide at 30⯰C/min. The kinetic analysis showed that when the activation energies are located in the range 287-297â¯kJ/mol (MPW) and 153-187â¯kJ/mol (ZSM/MPW) and KAS, Vyazovkin, and Cai methods are the most suitable models to study pyrolysis kinetic of MPW with R2â¯>â¯89. Based on that, leaching and catalytic pyrolysis processes are a highly suggested technology that can be used to convert MFPW into high-added energy and chemical products.
Key words
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Plastics
/
Pyrolysis
Language:
En
Journal:
Sci Total Environ
Year:
2022
Document type:
Article
Country of publication:
HOLANDA
/
HOLLAND
/
NETHERLANDS
/
NL
/
PAISES BAJOS
/
THE NETHERLANDS