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Polymers
Volume 15
Issue 16
10.3390/polym15163329
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Article

Synthesis and Application of ZSM-5 Catalyst Supported with Zinc and/or Nickel in the Conversion of Pyrolytic Gases from Recycled Polypropylene and Polystyrene Mixtures under Hydrogen Atmosphere

by
Diego Barzallo
1,2,*,
Rafael Lazo
1,
Carlos Medina
3,
Carlos Guashpa
3,
Carla Tacuri
3 and
Paúl Palmay
3,*
1
Facultad Ciencias e Ingeniería, Universidad Estatal de Milagro, Milagro 091050, Ecuador
2
Department of Chemistry, University of Balearic Islands, Cra. Valldemossa 7.5 km, 07122 Palma de Mallorca, Spain
3
Facultad de Ciencias, Escuela Superior Politécnica de Chimborazo ESPOCH, Panamericana Sur Km 1 1/2, Riobamba 060155, Ecuador
*
Authors to whom correspondence should be addressed.
Polymers 2023, 15(16), 3329; https://doi.org/10.3390/polym15163329
Submission received: 11 June 2023 / Revised: 13 July 2023 / Accepted: 4 August 2023 / Published: 8 August 2023
(This article belongs to the Special Issue Advanced Recycling of Plastic Waste: An Approach for Circular Economy)
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Abstract

Currently, catalytic pyrolysis has become a versatile and highly useful technology in the treatment of different plastic wastes. Thus, the development of selective catalysts to carry out cracking reactions and obtain a greater fraction of the desired products is essential. This study focuses on the synthesis of monometallic (Ni) and bimetallic (Ni-Zn) catalysts supported on ZSM-5 zeolite using an impregnation and co-impregnation method, respectively. The obtained catalysts were characterized by FTIR spectroscopy, N2 adsorption/desorption measurements, scanning electron microscopy (SEM) and energy dispersive X-Ray spectroscopy (EDS), temperature programmed NH3 desorption (TPD-NH3) and thermogravimetric analysis (TGA). In this way, a mixture of polystyrene and polypropylene recycled with a catalyst/plastic waste ratio of 1:500 was used for pyrolysis tests. The best results were obtained using the Ni-Zn/ZSM-5 catalyst, which included better impregnation, increased surface acidity, decreased dispersion and a shorter reaction time in the catalytic pyrolysis process. Under the optimized conditions, catalytic pyrolysis showed an excellent performance to generate hydrocarbons of greater industrial interest.
Keywords: catalyst; ZSM-5; monometallic; bimetallic; catalyst acidity; catalyst properties catalyst; ZSM-5; monometallic; bimetallic; catalyst acidity; catalyst properties

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MDPI and ACS Style

Barzallo, D.; Lazo, R.; Medina, C.; Guashpa, C.; Tacuri, C.; Palmay, P. Synthesis and Application of ZSM-5 Catalyst Supported with Zinc and/or Nickel in the Conversion of Pyrolytic Gases from Recycled Polypropylene and Polystyrene Mixtures under Hydrogen Atmosphere. Polymers 2023, 15, 3329. https://doi.org/10.3390/polym15163329

AMA Style

Barzallo D, Lazo R, Medina C, Guashpa C, Tacuri C, Palmay P. Synthesis and Application of ZSM-5 Catalyst Supported with Zinc and/or Nickel in the Conversion of Pyrolytic Gases from Recycled Polypropylene and Polystyrene Mixtures under Hydrogen Atmosphere. Polymers. 2023; 15(16):3329. https://doi.org/10.3390/polym15163329

Chicago/Turabian Style

Barzallo, Diego, Rafael Lazo, Carlos Medina, Carlos Guashpa, Carla Tacuri, and Paúl Palmay. 2023. "Synthesis and Application of ZSM-5 Catalyst Supported with Zinc and/or Nickel in the Conversion of Pyrolytic Gases from Recycled Polypropylene and Polystyrene Mixtures under Hydrogen Atmosphere" Polymers 15, no. 16: 3329. https://doi.org/10.3390/polym15163329

APA Style

Barzallo, D., Lazo, R., Medina, C., Guashpa, C., Tacuri, C., & Palmay, P. (2023). Synthesis and Application of ZSM-5 Catalyst Supported with Zinc and/or Nickel in the Conversion of Pyrolytic Gases from Recycled Polypropylene and Polystyrene Mixtures under Hydrogen Atmosphere. Polymers, 15(16), 3329. https://doi.org/10.3390/polym15163329

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