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Catalysts
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Recent Advances in Heterogeneous Catalysis for Low-Carbon Fuels
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Recent Advances in Heterogeneous Catalysis for Low-Carbon Fuels

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

Deadline for manuscript submissions: closed (31 January 2024) | Viewed by 2634

Special Issue Editors

Dr. Qingchun Yuan

E-Mail Website
Guest Editor
Aston Institute of Materials Research, Aston University, Birmingham B4 7ET, UK
Interests: nanomaterials; catalysis; green conversion; processing
Dr. Qingwei Meng

E-Mail Website
Guest Editor
School of Chemical Engineering and Light Industry, Guangdong University of Technology, Guangzhou 510006, China
Interests: heterogeneous catalysis; biomass conversion; synthesis of polymer monomers; hydrogen energy

Special Issue Information

Dear Colleagues,

At present, reducing carbon usage is the most popular way of addressing global warming and environmental issues. Low-level carbon or carbon-neutral energy replacing fossil fuel-based energy has been at the center of technological and industrial developments in the past few decades. The production of carbon-neutral fuels, for example, from biomass and/or carbon dioxide as sustainable energy, is highly desirable for the replacement of fossil fuel-based fuels to use the infrastructure developed so far, while effective heterogeneous catalysis can be used to efficiently convert biomass/carbon dioxide into desired green fuels to drive the progression of carbon-neutral fuel development.

This Special Issue on “Recent Advances in Heterogeneous Catalysis for Low-Carbon Fuels” aims to showcase the most recent discoveries and significant developments in the production and utilization of fuels derived from renewable sources and captured carbon dioxide. All original research papers, short reviews, and case studies encompassing the subject lines are welcome for the submission.

If you would like to submit papers to this Special Issue or have any questions, please contact the editor, Mr. Ives Liu ([email protected]).

Dr. Qingchun Yuan
Dr. Qingwei Meng
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. 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 2700 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

  • heterogeneous catalysis
  • biomass conversion
  • carbon neutral fuels
  • CO2 to fuels
  • low-carbon fuels

Published Papers (2 papers)

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Research

17 pages, 4089 KiB  
Article
Assessment of Reaction Kinetics for the Dehydrogenation of Perhydro-Dibenzyltoluene Using Mg- and Zn-Modified Pt/Al2O3 Catalysts
by Rudaviro Garidzirai, Phillimon Modisha and Dmitri Bessarabov
Catalysts 2024, 14(1), 32; https://doi.org/10.3390/catal14010032 - 29 Dec 2023
Viewed by 1131
Abstract
The catalysts utilized for the dehydrogenation of dibenzyltoluene-based liquid organic hydrogen carriers (LOHCs) remain crucial. The state-of-the-art catalyst for dehydrogenation of dibenzyltoluene-based LOHC still suffers from deactivation and by-product formation. This is crucial in terms of the efficiency of the industrial dehydrogenation plant [...] Read more.
The catalysts utilized for the dehydrogenation of dibenzyltoluene-based liquid organic hydrogen carriers (LOHCs) remain crucial. The state-of-the-art catalyst for dehydrogenation of dibenzyltoluene-based LOHC still suffers from deactivation and by-product formation. This is crucial in terms of the efficiency of the industrial dehydrogenation plant for hydrogen production, cyclability as well as the cost of replacing the catalyst. The development of catalysts with optimum performance, minimum deactivation and low by-product formation is required to attain the full benefits of the LOHC technology. Therefore, in this study, the effect of Mg and Zn modification on Pt/Al2O3 catalyst is investigated for the catalytic dehydrogenation of perhydro-dibenzyltoluene (H18-DBT). In addition, an assessment of reaction kinetics is also conducted. High dehydrogenation performance was obtained for Mg-doped Pt/Al2O3 using a batch reactor at 300 °C and 6 h reaction time. In this case, the degree of dehydrogenation (dod), productivity and conversion obtained are 100%, 1.84 gH2/gPt/min and 99.9%, respectively. Moreover, the Mg-doped catalyst has resulted in a high turnover frequency (TOF) of 586 min−1 compared to the Zn-doped catalyst (269 min−1) and the undoped catalyst (202 min−1) at the reaction temperature of 300 °C. The amount of by-products increased with an increase in the catalytic activity, with the Pt/Mg-Al2O3 catalyst possessing the highest amount of by-products. The dehydrogenation of H18-DBT followed first-order reaction kinetics. In addition, the activation energy obtained using the Arrhenius model is 102, 130 and 151 kJ/mol for Pt/Al2O3, Pt/Zn-Al2O3 and Pt/Mg-Al2O3, respectively. Although the Mg-doped Pt/Al2O3 shows high activation energy, the higher performance of the catalyst suggests that mass transfer limitations have no major effect on the dehydrogenation reaction under the conditions used. Full article
(This article belongs to the Special Issue Recent Advances in Heterogeneous Catalysis for Low-Carbon Fuels)
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15 pages, 5264 KiB  
Article
Efficient Hydrogen Production from the Aqueous-Phase Reforming of Biomass-Derived Oxygenated Hydrocarbons over an Ultrafine Pt Nanocatalyst
by Ze Xiao, Xi Lin, Wenhua Feng, Binyi Chen, Qingwei Meng and Tiejun Wang
Catalysts 2023, 13(11), 1428; https://doi.org/10.3390/catal13111428 - 12 Nov 2023
Viewed by 1187
Abstract
Hydrogen from biomass, as a promising alternative fuel, is becoming considerably attractive due to its high energy density and clean emissions. The aqueous phase reforming (APR) of biomass-derived oxygenated hydrocarbons and water is a renewable and efficient pathway for hydrogen production and shows [...] Read more.
Hydrogen from biomass, as a promising alternative fuel, is becoming considerably attractive due to its high energy density and clean emissions. The aqueous phase reforming (APR) of biomass-derived oxygenated hydrocarbons and water is a renewable and efficient pathway for hydrogen production and shows great potential. However, the key to the application of this technique is to develop catalysts with high hydrogen productivity. In this work, we first synthesized polyaniline–platinum (PANI-Pt) organo-metallic hybrid precursors and then obtained a high-loaded (~32 wt.% Pt) and highly dispersed (~3 nm Pt particles) Pt@NC−400 catalyst after pyrolysis at 400 °C, and the nanoparticles were embedded in a nitrogen-doped carbon (NC) support. The Pt@NC−400 catalyst showed an almost three times higher hydrogen production rate (1013.4 μmolH2/gcat./s) than the commercial 20% Pt/C catalyst (357.3 μmolH2/gcat./s) for catalyzing methanol–water reforming at 210 °C. The hydrogen production rate of 1,2-propanediol APR even reached 1766.5 μmolH2/gcat./s over the Pt@NC−400 catalyst at 210 °C. In addition, Pt@NC−400 also exhibited better hydrothermal stability than 20% Pt/C. A series of characterizations, including ICP, XRD, TEM, SEM, XPS, N2 physisorption, and CO chemisorption, were conducted to explore the physiochemical properties of these catalysts and found that Pt@NC−400, although with higher loading than 20% Pt/C (~23 wt.% Pt, ~4.5 nm Pt particle), possessed a smaller particle size, a more uniform particle distribution, a better pore structure, and more Pt metal active sites. This study provides a strategy for preparing high-loaded and highly dispersed nanoparticle catalysts with high hydrogen productivity and sheds light on the design of stable and efficient APR catalysts. Full article
(This article belongs to the Special Issue Recent Advances in Heterogeneous Catalysis for Low-Carbon Fuels)
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