Editorial Board Members' Collection Series: Catalysts and Processes for Synthesis of Green Fuels

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Catalytic Materials".

Deadline for manuscript submissions: closed (31 October 2024) | Viewed by 670

Special Issue Editors


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Guest Editor
Department of Chemistry, University of Patras, GR-26504 Patras, Greece
Interests: heterogeneous catalysis; synthesis and characterization of porous materials; catalyst preparation; surface characterization; catalytic oil upgrading processes; environmental catalysis; photocatalysis; development of catalysts for biofuel production
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Guest Editor
Mountain Research Centre (CIMO), Polytechnic Institute of Bragança, Campus de Santa Apolónia, 5300-253 Bragança, Portugal
Interests: heterogeneous catalysis; magnetic nanocatalysts; carbon-based materials; design, preparation, and characterization of catalysts; advanced oxidation processes; environmental catalysis; catalytic wet peroxide oxidation; valorization of sub-products; chemical engineering
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The effects of greenhouse gases on climate change are of great concern to the international community. Fossil fuel consumption is a major contributor to greenhouse gas emissions, and the availability of fossil fuels is predicted to decrease in the near future. Therefore, the adoption and utilization of green fuels are among the more promising solutions proposed to address the abovementioned problems.

Green fuels are renewable net-zero carbon fuels that lessen the effects of fuel consumption for road transport and energy production, as well as marine and aviation transport, on climate change. The following kinds of green fuels present serious sustainability advantages:

  1. Green hydrogen produced in electrolyzers powered by wind or photovoltaic facilities;
  2. Biofuels produced by the utilization of waste biomass and green hydrogen;
  3. E-fuels produced by the utilization of CO2 fixed from the atmosphere;
  4. Solar fuels produced via artificial photosynthesis;
  5. Biofuels produced using biotechnology methods;
  6. Biofuels produced using biomass rather than hydrogen.

The development of catalysts (homogeneous, heterogeneous, biocatalysts, photo-catalysts etc.) and other materials (e.g. electro-catalysts and electrolyte membranes for fuel cells and electrolyzers) used in green fuels production is decisive for commercialization of relevant processes. In addition, modification of traditional processes and the adventure of new ones are expected to bust further the green fuels synthesis.

This Special Issue aspires to collect and highlight pioneering research efforts concerning functional materials and processes related with the green fuels synthesis. In this context, we welcome research articles, communications and review article submissions.

Prof. Dr. Christos Kordulis
Prof. Dr. Helder T. Gomes
Guest Editors

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Keywords

  • green fuels
  • green hydrogen
  • e-fuels
  • solar fuels
  • biofuels
  • biomass valorization
  • catalysts

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Published Papers (1 paper)

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Research

16 pages, 2309 KiB  
Article
Green Diesel Production Catalyzed by MoNi Catalysts Supported on Rice Husk Biochar
by Eleana Kordouli, Panagiota-Iliana Vourtsani, Nikolaos Mourgkogiannis, John Zafeiropoulos, Kyriakos Bourikas and Christos Kordulis
Catalysts 2024, 14(12), 865; https://doi.org/10.3390/catal14120865 (registering DOI) - 26 Nov 2024
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Abstract
Nickel-based catalysts promoted by Mo-oxo species have been proven to be quite promising for transformation of triglycerides into green diesel. The selection of the support for such catalysts is crucial. In the present study, pyrolyzed rice husk subjected to acid and/or alkaline post-treatment [...] Read more.
Nickel-based catalysts promoted by Mo-oxo species have been proven to be quite promising for transformation of triglycerides into green diesel. The selection of the support for such catalysts is crucial. In the present study, pyrolyzed rice husk subjected to acid and/or alkaline post-treatment was studied as support for the aforementioned catalysts. Biochar produced by slow pyrolysis of raw material at 850 °C for 5 h under limited-oxygen conditions exhibited the most promising textural characteristics. These were substantially improved by alkaline post-treatment. Thus, the corresponding MoNi catalysts proved the most efficient for upgrading used cooking oil (UCO) to green diesel via a solvent-free hydrotreatment process, performed in a semi-batch reactor (at 310 °C, 40 bar, 100 mL/min H2, 100 mL UCO and 1 g of catalyst). The enhanced catalytic performance (complete conversion of UCO and 32 wt.% green diesel yield) of MoNi catalysts supported on biochar subjected at least to an alkaline post-treatment step has been attributed to their high SSA, suitable pore size distribution (enhanced mesoporosity), and acidity (enhanced population of acid sites with moderate strength), as well as to the high dispersion of the active phase. Full article
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