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Cutting-Edge Developments in Waste-to-Energy Technologies

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "B: Energy and Environment".

Deadline for manuscript submissions: 25 March 2025 | Viewed by 864

Special Issue Editors


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Guest Editor
Environmental Analysis and Resource Recycling Laboratory, Department of Environment and Energy Engineering, Chonnam National University, Gwangju, Republic of Korea
Interests: waste to energy; pollutant analysis and organic and inorganic waste; waste resource utilization

E-Mail Website
Guest Editor
Department of Environment and Energy Engineering, Chonnam National University, Gwangju, Republic of Korea
Interests: renewable and sustainable energy resource; waste management; waste to value-added chemicals; biomass and biorefineries; thermochemical conversion of waste; extraction; catalyst

Special Issue Information

Dear Colleagues,

With increasing global waste generation and the need for sustainable energy, waste-to-energy technologies have become crucial in environmental science and engineering. The diversity of waste materials—such as organic, plastic, and industrial waste—offers unique opportunities for technological innovation. Recent advancements, including anaerobic digestion, incineration,  gasification, and pyrolysis, bio-oil production, have enhanced the efficiency of energy recovery while minimizing waste sent to landfills. These technologies contribute to renewable energy in the form of electricity, heat, RDF,  fuel gasses, and biofuels.

Our goal is to explore the potential of waste-to-energy technologies in fostering a circular economy, improving resource recovery, and reducing greenhouse gas emissions. By encouraging interdisciplinary research, this issue will promote collaboration among scientists, engineers, policymakers, and industry stakeholders.

We look forward to your contributions that will help shape the future of waste-to-energy technologies.

Topics of interest for publication include, but are not limited to:

  • Innovative technology development for waste conversion to energy;
  • Process optimization and efficiency improvements;
  • Chemical and biological processes;
  • Thermochemical conversion of waste-to-energy incineration, gasification, and pyrolysis;
  • Hydrothermal carbonization of biomass/organic waste to biofuels;
  • Homogeneous and heterogeneous catalysis;
  • Biomass and biofuels;
  • Upgrading of lignin-derived crude oil;
  • Feasibility studies;
  • Waste recycling and reuse;
  • Case studies and real-world applications;
  • Policy and economic analyses.

Prof. Dr. Jeong-Hun Park
Dr. Masud Rana
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • waste to energy
  • organic
  • thermal treatment
  • incineration
  • gasification
  • biofuel production
  • pyrolysis
  • refuse-derived fuel (RDF)
  • renewable

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Published Papers (1 paper)

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Research

19 pages, 3151 KiB  
Article
Catalyst-Free Depolymerization of Methanol-Fractionated Kraft Lignin to Aromatic Monomers in Supercritical Methanol
by Shubho Ghosh, Masud Rana and Jeong-Hun Park
Energies 2024, 17(24), 6482; https://doi.org/10.3390/en17246482 - 23 Dec 2024
Viewed by 541
Abstract
Lignin is considered a renewable source for the production of valuable aromatic chemicals and liquid fuel. Solvent depolymerization of lignin is a fruitful strategy for the valorization of lignin. However, Kraft lignin is highly prone to produce char (a by-product) during the hydrothermal [...] Read more.
Lignin is considered a renewable source for the production of valuable aromatic chemicals and liquid fuel. Solvent depolymerization of lignin is a fruitful strategy for the valorization of lignin. However, Kraft lignin is highly prone to produce char (a by-product) during the hydrothermal depolymerization process due to its poor solubility in organic solvents. Therefore, the minimization of char formation remains challenging. The purpose of the present study was to fractionate Kraft lignin in methanol to obtain low-molecular-weight fractions that could be further depolymerized in supercritical methanol to produce aromatic monomers and to suppress char formation. The results showed that the use of methanol-soluble lignin achieved a bio-oil yield of 45.04% and a char yield of 39.6% at 280 °C for 2 h compared to 28.57% and 57.73%, respectively, when using raw Kraft lignin. Elemental analysis revealed a high heating value of 30.13 MJ kg−1 and a sulfur content of only 0.09% for the bio-oil derived from methanol-soluble lignin. The methanol extraction process reduced the oxygen content and increased the hydrogen and carbon contents in the modified lignin and bio-oil, indicating that the extracted lignin fraction had an enhanced deoxygenation capability and a higher energy content. These findings highlight the potential of methanol-soluble Kraft lignin as a valuable resource for sustainable energy production and the production of aromatic compounds. Full article
(This article belongs to the Special Issue Cutting-Edge Developments in Waste-to-Energy Technologies)
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