Designing Catalytic Desulfurization Processes to Prepare Clean Fuels, 2nd Edition

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

Deadline for manuscript submissions: 15 October 2024 | Viewed by 1528

Special Issue Editors


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LAQV-REQUIMTE Associate Laboratory, University of Porto, Porto 4169-007, Portugal
Interests: heterogeneous catalysts; polyoxometalates; catalytic metal-organic frameworks; sustainable catalytic processes; oxidation catalysis; hydrogen peroxide; desulfurization; glycerol oxidation; deep-eutectic solvents
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REQUIMTE, Chemistry Department, Universidade do Porto, Porto, Portugal
Interests: atmospheric pollution; urban aerosol; traffic emissions; source emissions; organic tracers; carbonac, MOFs; POMs; catalysis; oxidative desulfurization system;diesel; fuel; jets; GC-FID; GC-MS
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This issue is a continuation of the previous successful Special Issue “Designing Catalytic Desulfurization Processes to Prepare Clean Fuels”.

Sulfur compounds in fuels are the main reason for acid rain and environmental pollution. The combustion of fossil fuels generates emissions of sulfur such as sulfur dioxide (SO2), which is corrosive and toxic, and fine particulate matter of metal sulfates. In response to this, the specifications of transportation fuels set by governments have been increasing with respect to sulfur content over the years. The strict regulations imposed have required the development of novel technologies with higher cost efficiency and sustainability, adapted to a variety of different fuels, presenting distinct properties and sulfur contents. The actual desulfurization method in world refineries, i.e., hydrodesulfurization, has been adjusted to meet the tight specifications of the current limit imposed by government directives; however, the extreme severe conditions required (high temperature, pressure, and consumption of large amounts of hydrogen) are affecting the economic viability of the process. On the other hand, the hydrodesulfurization process is unviable for treating certain types of fuels, such as heavy fuel oil.

Catalytic processes can be used to improve or even replace the actual hydrodesulfurization. Therefore, this Special Issue aims to outline promising catalytic desulfurization technologies to treat fuels, designing novel cost-effective and sustainable processes. These can include biocatalysis, extractive, oxidation, adsorptive processes, etc., with viability for industrial application. Submissions are welcome in the form of original research manuscripts or critical review papers that represent the scientific field.

Dr. Salete Balula
Dr. Fátima Mirante
Guest Editors

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Keywords

  • clean fuels
  • sulfur compounds
  • catalysts desulfurization processes
  • materials for sulfur removal
  • sustainable catalytic processes

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Published Papers (1 paper)

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Review

24 pages, 2405 KiB  
Review
Advanced Technologies Conciliating Desulfurization and Denitrogenation to Prepare Clean Fuels
by Rui G. Faria, Dinis Silva, Fátima Mirante, Sandra Gago, Luís Cunha-Silva and Salete S. Balula
Catalysts 2024, 14(2), 137; https://doi.org/10.3390/catal14020137 - 09 Feb 2024
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Abstract
The removal of sulfur- and nitrogen-containing compounds present in fuels is and will be crucial to accomplish actual strict regulations to avoid environmental and humanity health adversities. The conventional hydrodesulfurization and hydrodenitrogenation processes conducted by refineries are limited due to severe operating conditions, [...] Read more.
The removal of sulfur- and nitrogen-containing compounds present in fuels is and will be crucial to accomplish actual strict regulations to avoid environmental and humanity health adversities. The conventional hydrodesulfurization and hydrodenitrogenation processes conducted by refineries are limited due to severe operating conditions, and even more importantly, they are inefficient for simultaneously removing nitrogen- and sulfur-containing compounds in fuels. On the other hand, non-hydrogen technologies are beneficial in terms of mild operating conditions, and during the last two decades, some successful works have shown that these can be highly effective at efficiently removing both sulfur- and nitrogen-containing compounds from liquid fuels. For more than four decades, extensive research (thousands of publications since the 1980s) has been dedicated to developing remote desulfurization technologies without taking into consideration the presence of a complex fuel matrix, or even taking into account the presence of other harmful pollutant elements, such as nitrogen. Even more recently, several effective non-hydrogen denitrogenation processes have been reported without considering the presence of sulfur compounds. This review paper is a reflection on the limited work that has been successfully performed to simultaneously remove sulfur- and nitrogen-containing compounds from fuels. An evaluation of different methodologies (adsorption, extraction, oxidative (photo)catalysis, ultrasound-assisted oxidation) is presented here. Furthermore, this review intends to define new future strategies that will allow the design of more suitable and economical technologies, effectively conciliating desulfurization and denitrogenation processes to produce more sustainable fuels. Full article
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