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New Trends in Biofuels and Bioenergy for Sustainable Development: 3rd Edition

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A4: Bio-Energy".

Deadline for manuscript submissions: closed (30 June 2025) | Viewed by 768

Special Issue Editors

Prof. Dr. João Fernando Pereira Gomes

E-Mail Website
Guest Editor
Department of Chemical Engineering, Instituto Superior de Engenharia de Lisboa (ISEL), 1959-007 Lisbon, Portugal
Interests: heterogeneous catalysis; biodiesel; clean energy; clean process; nanotechnologies; CO2 capture; air pollution abatement
Special Issues, Collections and Topics in MDPI journals
Dr. Toufik Boushaki

E-Mail Website
Guest Editor
ICARE CNRS, Université d’Orléans, Avenue de la Recherche Scientifique, CEDEX 2, 45071 Orléans, France
Interests: turbulent combustion; swirling flames; oxy-fuel combustion; plasma-assisted combustion; biomass; CO2 capture
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

We are pleased to invite you to submit your article to this Special Issue, entitled “New Trends in Biofuels and Bioenergy for Sustainable Development: 3rd Edition,” in the open-access journal Energies (IF 3.0).

This Special Issue encompasses different biofuels, including biomass, biohydrogen, bioalcohols, bioethanol, and biodiesel. Several sessions will be held, including Bioenergy, Biorefineries, Production of Biofuels, Bio-economy, Biomass Technology, Nanotechnology in Biofuels, Biofuel Cells, Environmental Impacts of Biofuels, Solar Energy, Biofuel Future and Market Scope, etc. The topics of interest for this Special Issue include, but are not limited to, the following:

I look forward to receiving your submissions.

Prof. Dr. João Fernando Pereira Gomes
Dr. Toufik Boushaki
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

  • bioenergy
  • biomass
  • biofuels
  • biogas

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Related Special Issue

Published Papers (2 papers)

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Research

20 pages, 3330 KB  
Article
Development of Process Configurations and Simulation of Biofuel Production
by Joanna Kasprzak and Mariya Marinova
Energies 2025, 18(17), 4713; https://doi.org/10.3390/en18174713 - 4 Sep 2025
Abstract
The production of biobutanol from lignocellulosic biomass is a promising route toward sustainable biofuels, but current research is limited due to the use of commercial simulation tools, incomplete process modeling, and insufficient variation in available feedstock. The current work addresses these gaps by [...] Read more.
The production of biobutanol from lignocellulosic biomass is a promising route toward sustainable biofuels, but current research is limited due to the use of commercial simulation tools, incomplete process modeling, and insufficient variation in available feedstock. The current work addresses these gaps by developing and evaluating a complete process simulation for biobutanol production using the open-source software DWSIM. A process flow diagram was established based on a comprehensive literature review, and relevant experimental data were collected to guide simulation inputs and validate results. Six process configurations were developed, using dilute acid and autohydrolysis as pretreatment methods, and assessed based on parameters such as feedstock composition, conversion efficiency, and enzymatic hydrolysis performance. Simulation results show that DWSIM effectively models key stages of biobutanol production and accommodates variations in pretreatment and hydrolysis conditions. Processing solid fractions of pretreated biomass yields higher biobutanol concentrations than using liquid prehydrolysate alone, and the efficiency of enzymatic hydrolysis strongly influences the final output. This work demonstrates that DWSIM is a viable platform for simulating biofuel processes and offers a flexible, cost-effective alternative for early-stage process development, followed by process design with implications for future biorefinery integration and technology scaling. Full article
(This article belongs to the Special Issue New Trends in Biofuels and Bioenergy for Sustainable Development: 3rd Edition)
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21 pages, 2243 KB  
Article
Selective Extraction and Hydrotreatment of Biocrude from Sewage Sludge: Toward High-Yield, Alkane-Rich, Low-Heteroatom Biofuels
by Muhammad Usman, Shuo Cheng, Sasipa Boonyubol, Muhammad Aziz and Jeffrey S. Cross
Energies 2025, 18(17), 4568; https://doi.org/10.3390/en18174568 - 28 Aug 2025
Viewed by 302
Abstract
This study investigates the hydrothermal liquefaction (HTL) of sewage sludge across a temperature range of 250–375 °C, combined with selective solvent extraction and catalytic hydrotreatment to produce high-quality biocrude. Four solvents including dichloromethane (DCM), hexane, ethyl butyrate (EB), and ethyl acetate (EA), were [...] Read more.
This study investigates the hydrothermal liquefaction (HTL) of sewage sludge across a temperature range of 250–375 °C, combined with selective solvent extraction and catalytic hydrotreatment to produce high-quality biocrude. Four solvents including dichloromethane (DCM), hexane, ethyl butyrate (EB), and ethyl acetate (EA), were used to evaluate temperature-dependent extraction performance and product quality. Biocrude yields increased from 250 °C to a maximum at 350 °C for all solvents: hexane (9.3–18.1%), DCM (16.3–49.7%), EB (17.6–50.1%), and EA (9.6–23.5%). A yield decline was observed at 375 °C due to secondary cracking and gasification. Elemental analysis revealed that hexane and EB extracts had higher carbon (up to 61.6 wt%) and hydrogen contents, while DCM retained the most nitrogen (up to 3.96 wt%) due to its polarity. Sulfur remained below 0.5 wt% in all biocrudes. GC–MS analysis of 350 °C biocrudes showed fatty acids as dominant components (43–53%), especially palmitic acid, along with ketones, amides, and heterocyclic compounds. Hydrotreatment using Ni/SiO2–Al2O3 significantly enhanced biocrude quality by increasing alkane content by 40–60% and reducing nitrogen levels by up to 75%, with higher heating values reaching 38–44 MJ/kg. These findings demonstrate the integrated potential of HTL process tuning, green solvent extraction, and catalytic upgrading for converting sewage sludge into cleaner, energy-dense biofuels. Full article
(This article belongs to the Special Issue New Trends in Biofuels and Bioenergy for Sustainable Development: 3rd Edition)
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