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Sustainable Catalytic Routes for the Production of Green Synthetic Fuels...
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Sustainable Catalytic Routes for the Production of Green Synthetic Fuels and Other Value-Added Products

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

Deadline for manuscript submissions: 28 February 2025 | Viewed by 3468

Special Issue Editor

Dr. Adriana Maria da Silva

E-Mail Website
Guest Editor
Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO), Duque de Caxias, RJ, Brazil
Interests: heterogeneous catalysis; catalysts synthesis; CO2 conversion; biomass conversion and sustainable process; graphene-based catalysts; supported-organocatalysts; nanometrology applied to catalysts
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Increasing concern with regard to fuel fossil dependency and climate change has triggered the search for sustainable energy and clean production processes. Various strategies have been considered to this end, wherein catalytic CO2 hydrogenation to obtain high-added-value products has received particular attention. CO2 hydrogenation has gained renewed interest boosted by the development of green hydrogen. Among the possible products of this process, green gasoline appears promising for extending the life of the current automotive fleet and fuel distribution infrastructure.

Another outstanding strategy for the production of fuels and chemicals relies on biomass valorization through the use of building block molecules for their subsequent conversion to chemicals and fuels. These molecules are versatile structures, with distinct functional groups, thus being more susceptible to conversion to a variety of chemicals. A wide range of platform molecules can be derived from biomass, such as four-carbon diacids (malic, fumaric and succinic acid) 5-(hydroxymethyl) furfural (HMF), furans and ethanol, to mention few, which can be catalytically converted into fuels, chemicals and materials such as biobased polymers, lubricants, solvents and fuels.

This Special Issue is dedicated to the use of heterogeneous catalysis for the transformation of materials classified as pollutant or waste into high-added-value, sustainable products. High-quality research in the field utilizing experimental, theoretical and economical analysis and focusing on the development of new catalysts are welcome.

Dr. Adriana Maria da Silva
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. Catalysts is an international peer-reviewed open access monthly 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 2200 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

  • catalytic CO2 hydrogenation
  • Fisher–Tropsch
  • biomass valorization
  • platform molecules
  • green fuels

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Published Papers (3 papers)

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Research

14 pages, 1620 KiB  
Article
Research on Deoxygenation Pyrolysis of Larch Based on Microwave Heating
by Shuang Xue, Xin Wang, Biao Zhang, Bin Xiao and Yongyi Song
Catalysts 2024, 14(11), 808; https://doi.org/10.3390/catal14110808 - 10 Nov 2024
Viewed by 459
Abstract
Aiming at problems such as low energy utilization efficiency and the high oxygen content of liquid products in the process of conventional biomass conversion to prepare liquid fuels, the deoxygenation pyrolysis technology route of larch based on microwave heating was proposed in this [...] Read more.
Aiming at problems such as low energy utilization efficiency and the high oxygen content of liquid products in the process of conventional biomass conversion to prepare liquid fuels, the deoxygenation pyrolysis technology route of larch based on microwave heating was proposed in this paper. Two kinds of calcium–iron composite oxygen carriers, including Ca2Fe2O5 with iron ore structure and CaFe2O4 with spinel structure, were successfully synthesized. The results showed that the selectivity of ideal products was improved under the action of single iron-based oxygen carriers; however, the deoxygenation effect was undesirable. Under the action of CaFe2O4, the selectivity of aromatics was increased to 27.17% and the selectivity of phenols was decreased to 36.46%, which mainly existed in the form of O1P with low oxygen content. The oxygen content of bio-oil was reduced to 27.70% and the calorific value was increased to 29.05 MJ/kg, thus leading to a great improvement in the quality of liquid products. After the pyrolysis reaction, the Fe2P3/2 XPS peak of CaFe2O4 shifted to a higher binding energy and was characterized as higher valence of iron oxide, which proved its “oxygen grabbing” capacity in microwave pyrolysis. The deoxygenation conversion of larch without an external hydrogen supply was achieved. Full article
(This article belongs to the Special Issue Sustainable Catalytic Routes for the Production of Green Synthetic Fuels and Other Value-Added Products)
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20 pages, 8018 KiB  
Article
Highly Efficient PtSn/Al2O3 and PtSnZnCa/Al2O3 Catalysts for Ethane Dehydrogenation: Influence of Catalyst Pretreatment Atmosphere
by Seetharamulu Podila, Abdulrahim A. Al-Zahrani, Muhammad A. Daous and Hesham Alhumade
Catalysts 2024, 14(5), 312; https://doi.org/10.3390/catal14050312 - 9 May 2024
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Abstract
Increased demand for ethylene has motivated direct ethane dehydrogenation over Pt-based catalysts. PtSn/γ-Al2O3 and PtSnZnCa/γ-Al2O3 catalysts were investigated with the aim of understanding the effect of the pretreatment environment on the state of dispersed Pt for ethane [...] Read more.
Increased demand for ethylene has motivated direct ethane dehydrogenation over Pt-based catalysts. PtSn/γ-Al2O3 and PtSnZnCa/γ-Al2O3 catalysts were investigated with the aim of understanding the effect of the pretreatment environment on the state of dispersed Pt for ethane dehydrogenation. The catalysts were prepared by the impregnation method and pretreated in different environments like static air (SA), flowing air (FA), and nitrogen (N2) atmospheres. A comprehensive characterization of the catalysts was performed using Brunauer–Emmett–Teller (BET), X-ray diffraction (XRD), Temperature-Programmed Reduction (TPR), NH3 Temperature-Programmed Desorption (NH3-TPD), X-ray photoelectron spectroscopy (XPS), and Transmission Electron Microscopy (TEM) techniques. The results reveal that the PtSn on Al2O3 catalyst pretreated in the static air environment (PtSn-SA) exhibits 21% ethylene yield with 95% selectivity at 625 °C. XPS analysis found more platinum and tin on the catalyst surface after static air treatment. The overall acidity of the catalysts decreased after thermal treatment in static air. Elemental mapping demonstrated that Pt agglomeration was pronounced in catalysts calcined under flowing air and nitrogen. These factors are responsible for the enhanced activity of the PtSn-SA catalyst compared to the other catalysts. The addition of Zn and Ca to the PtSn catalysts increases the yield of the catalyst calcined in static air (PtSnZnCa-SA). The PtSnZnCa-SA catalyst showed the highest ethylene yield of 27% with 99% selectivity and highly stable activity at 625 °C for 10 h. Full article
(This article belongs to the Special Issue Sustainable Catalytic Routes for the Production of Green Synthetic Fuels and Other Value-Added Products)
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20 pages, 5292 KiB  
Article
One-Step Production of Highly Selective Ethylbenzene and Propylbenzene from Benzene and Carbon Dioxide via Coupling Reaction
by Tianyun Wang, Yingjie Guan, Haidan Wu, Zhaojie Su, Jianguo Zhuang, Siyan Yan, Xuedong Zhu and Fan Yang
Catalysts 2024, 14(5), 288; https://doi.org/10.3390/catal14050288 - 24 Apr 2024
Viewed by 1333
Abstract
Utilizing carbon dioxide as a carbon source for the synthesis of olefins and aromatics has emerged as one of the most practical methods for CO2 reduction. In this study, an improved selectivity of 85% for targeting products (ethylbenzene and propylbenzene) is achieved [...] Read more.
Utilizing carbon dioxide as a carbon source for the synthesis of olefins and aromatics has emerged as one of the most practical methods for CO2 reduction. In this study, an improved selectivity of 85% for targeting products (ethylbenzene and propylbenzene) is achieved with a benzene conversion of 16.8% by coupling the hydrogenation of carbon dioxide to olefins over the bifunctional catalyst “Oxide-Zeolite” (OX-ZEO) and the alkylation of benzene with olefins over ZSM-5. In addition to investigating the influence of SAPO-34 and ZSM-5 zeolite acidity on product distribution, catalyst deactivation due to coke formation is addressed by modifying both molecular sieves to be hierarchical to extend the catalyst lifespan. Even after 100 h of operation at 400 °C, the catalysts maintained over 80% selectivity towards the target products, with benzene conversion over 14.2%. Furthermore, the pathway of propylbenzene formation is demonstrated through simple experimental design, revealing that the surface Brønsted acid sites of SAPO-34 serve as its primary formation sites. This provides a novel perspective for further investigation of the reaction network. Full article
(This article belongs to the Special Issue Sustainable Catalytic Routes for the Production of Green Synthetic Fuels and Other Value-Added Products)
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: From pollutant to added-value products and green fuel – the power of CO2 catalytic Conversion
Authors: João L. M. Barros, Ricardo J. Chimentão, João O. dos Santos, Carlos A. Franchini, José M. C. Bueno, Adriana M. Silva
Affiliation: Instituto Nacional de Metrologia, Qualidade e Tecnologia (INMETRO), Duque de Caxias, RJ, Brazil

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