Pyrolysis Applications in Plastic Waste and Biomass Valorization

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Energy Science and Technology".

Deadline for manuscript submissions: 31 May 2024 | Viewed by 2341

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Department of Chemical Engineering, Faculty of Sciences, University of Granada, 18071 Granada, Spain
Interests: biomass gasification, pyrolysis, and torrefaction; adsorption of contaminants (mainly heavy metals) by porous solids; advances in mineral processing and management of mining waste; plastic waste management
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Special Issue Information

Dear Colleagues,

Plastic materials have been crucial to the development of science, technology, and almost all aspects of modern progress since the mid-twentieth century. However, the increasingly unsustainable culture of plastic consumption and the accumulation of plastics in landfills, oceans, and broader ecosystems have also caused negative and potentially irreversible environmental impacts. In recent decades, scientists and engineers have spent significant time and resources searching for more effective plastic waste management techniques based on thermochemical routes such as pyrolysis. On the other hand, biomass is a renewable source and potentially sustainable fossil fuel replacement due to its availability, lower processing cost, high conversion, and lower life cycle carbon emissions. Pyrolysis can also be used to convert biomass into high-quality liquid fuels and chemicals. Pyrolysis can be improved by the use of catalysts, which can reduce the temperature and reaction time and allow the production of chemicals with a higher added value.

This Special Issue seeks recent advances in both thermal and catalytic pyrolysis. The pyrolysis mechanisms, the influence of operating parameters and catalysts, and the characterization and applications of pyrolysis products will all be discussed.

Prof. Dr. Mónica Calero de Hoces
Guest Editor

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Keywords

  • biomass
  • plastic waste
  • thermal pyrolysis
  • catalytic pyrolysis
  • valorization
  • waste treatment

Published Papers (1 paper)

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Research

17 pages, 3495 KiB  
Article
Revalorizing a Pyrolytic Char Residue from Post-Consumer Plastics into Activated Carbon for the Adsorption of Lead in Water
by Rafael R. Solís, María Ángeles Martín-Lara, Ana Ligero, Josefa Balbís, Gabriel Blázquez and Mónica Calero
Appl. Sci. 2022, 12(16), 8032; https://doi.org/10.3390/app12168032 - 11 Aug 2022
Cited by 9 | Viewed by 1799
Abstract
This work focuses on the use of a char produced during the pyrolysis of a mixture of non-recyclable plastics as a precursor for the preparation of porous activated carbon with high developed adsorption uptake of lead in water. Physical and chemical activation was [...] Read more.
This work focuses on the use of a char produced during the pyrolysis of a mixture of non-recyclable plastics as a precursor for the preparation of porous activated carbon with high developed adsorption uptake of lead in water. Physical and chemical activation was used to enhance the porosity, surface area, and surface chemistry of char. The final activated carbon materials were deeply characterized through N2 adsorption isotherms, scanning electron microscopy, Fourier transformed infrared spectroscopy, analysis of the metal content by inductively coupled plasma mass spectroscopy, and pH of point zero charge. The native char displayed a Pb adsorption uptake of 348 mg Pb·g−1 and considerably high leaching of carbon, mainly organic, ca. 12%. After stabilization with HCl washing and activation with basic character activators, i.e., CO2, NaOH, and KOH, more stable adsorbents were obtained, with no organic leaching and a porous developed structure, the order of activation effectiveness being KOH (487 m2·g−1) > NaOH (247 m2·g−1) > CO2 (68 m2·g−1). The activation with KOH resulted in the most effective removal of Pb in water with a saturation adsorption uptake of 747 mg Pb·g−1. Full article
(This article belongs to the Special Issue Pyrolysis Applications in Plastic Waste and Biomass Valorization)
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