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Energies
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Advanced Biofuels: Production, Characterization and Upgrade
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Advanced Biofuels: Production, Characterization and Upgrade

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

Deadline for manuscript submissions: 30 July 2024 | Viewed by 1372

Special Issue Editor

Dr. Nikolaos Kokkinos

E-Mail Website
Guest Editor
Department of Chemistry, International Hellenic University, Ag. Loukas, 654 04 Kavala, Greece
Interests: biodiesel production; biofuel production; biomass conversion; renewable energy technologies; energy engineering
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Global energy security, climate change concerns, and energy crises have motivated the exploration of alternative renewable sources of energy. Biomass is considered the only carbon-containing and plentiful renewable source of energy. The sustainable production of advanced liquid transportation and aviation biofuels using various second-generation feedstock could be a promising alternative. Catalysis is expected to be a key tool used for the chemical transformation of biomass substrates to advanced biofuels. The use of catalytic systems with transition element complexes can enhance the basic properties of the biofuel by producing a suitable mixture of fatty acid methyl esters, which cannot be produced naturally or via any transesterification process.

This Special Issue will approach advanced biofuels from its production stage till its properties determination and upgrade.

Expected outcomes include:

  • Studying new biomass feedstocks;
  • Examining various pathways for sustainable fuel production;
  • Assessing waste-to-energy processes and plants;
  • Applying innovative catalytic techniques for producing and upgrading biofuels;
  • Using several chemical analysis techniques for advanced fuel characterization;
  • Evaluating numerous advanced biofuels blends.  

Dr. Nikolaos Kokkinos
Guest Editor

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

  • biofuels
  • sustainable aviation fuels
  • fuel upgrade
  • waste-to-energy
  • industrial catalytic processes

Published Papers (2 papers)

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17 pages, 6668 KiB  
Article
The Comparison of Physical and Chemical Properties of Pellets and Briquettes from Hemp (Cannabis sativa L.)
by Kamil Roman and Emilia Grzegorzewska
Energies 2024, 17(9), 2210; https://0-doi-org.brum.beds.ac.uk/10.3390/en17092210 - 4 May 2024
Viewed by 340
Abstract
The adaptation of lignocellulosic materials such as Cannabis sativa L. as a new renewable energy source is linked to the fact that the technology must be developed to be able to adapt to local market conditions. Bioenergy consumers are faced with this problem [...] Read more.
The adaptation of lignocellulosic materials such as Cannabis sativa L. as a new renewable energy source is linked to the fact that the technology must be developed to be able to adapt to local market conditions. Bioenergy consumers are faced with this problem because, when it comes to the selection of briquettes and pellets for energy production, there are only individual standards in place. This research is intended to provide a better understanding of hemp product potential as a new material that can be used in the production of pellets and briquettes for biofuel purpose. Nevertheless, the anisotropic raw material interferes with the compaction process and may expose a poor durability of the pellets and briquettes. The research that was conducted evaluated the conditions of the biofuels by measuring the physical and chemical parameters. The ash content, compressive strength, and durability of the samples were examined. The statistical data analysis was performed after the strength tests on the prepared samples. Full article
(This article belongs to the Special Issue Advanced Biofuels: Production, Characterization and Upgrade)
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20 pages, 1851 KiB  
Systematic Review
Catalytic Upgrading of Biodiesel by Partial Hydrogenation of Its FAME Composition: A Systematic Review
by Alexandros Psalidas, Elissavet Emmanouilidou and Nikolaos C. Kokkinos
Energies 2024, 17(3), 561; https://0-doi-org.brum.beds.ac.uk/10.3390/en17030561 - 24 Jan 2024
Viewed by 839
Abstract
Biodiesel is one of the most popular biofuels as it is a promising substitute for conventional diesel fuel, but for now, it cannot be used as a stand-alone fuel due to its low oxidative stability. For this reason, there have been efforts to [...] Read more.
Biodiesel is one of the most popular biofuels as it is a promising substitute for conventional diesel fuel, but for now, it cannot be used as a stand-alone fuel due to its low oxidative stability. For this reason, there have been efforts to upgrade biodiesel in the last few years through the partial hydrogenation of its fatty acid methyl esters (FAMEs). This procedure succeeds in resolving the problem of low oxidative stability, but in some cases, a new issue arises as non-selective hydrogenation deteriorates the fuel’s cold flow properties, which are crucial for vehicle’s operation without damaging the vehicle’s engine. More specifically, the problem of deteriorated cold flow properties is caused by the formation of trans-monounsaturated and fully saturated FAMEs during the hydrogenation reaction. Hydrogenated biodiesels are preferred to contain more cis-monounsaturated FAMEs because these are considered to have the best combination of high oxidative stability and good cold flow properties. As a result, various systems and methods have been tested to achieve selective partial hydrogenation of biodiesel FAMEs. In this review article, the catalytic systems and processes that stood out in various research studies are presented, and the factors that lead to the best possible outcome are investigated and discussed. Full article
(This article belongs to the Special Issue Advanced Biofuels: Production, Characterization and Upgrade)
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