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Catalysts
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Catalysis for Environmentally Benign Production of Alternative Fuels
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Catalysis for Environmentally Benign Production of Alternative Fuels

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

Deadline for manuscript submissions: closed (31 December 2022) | Viewed by 5817

Special Issue Editor

Prof. Dr. Jong Wook Bae

E-Mail Website
Guest Editor
School of Chemical Engineering, Sungkyunkwan University (SKKU), Jongno-gu, Korea
Interests: heterogeneous catalysis; C1 chemistry; alternative feedstock; clean fuels; COx hydrogenation; chemical looping; natural gas; chemical intermediates

Special Issue Information

Dear Colleagues,

Environmentally benign productions of chemical intermediates and clean fuels from alternative feedstock haven been getting attractive recently due to a fast depletion of oil reservoirs. Among them, syngas conversions into a broad range of fuel-grade hydrocarbons such as gasoline, diesel, jet fuel, oxygenates including dimethyl ether and alcohols, and chemical intermediates sch as light olefins and aromatics are more interested as core technologies of C1 chemistry. Those productions from various hydrocarbon feeds can also replace the existing petroleum-derived products. The syngas can be transformed to various value-added chemicals and fuels by COx hydrogenation mainly, which is an interesting alternative technology in order to solve environmental issues as well. The COx activations are well related with the surface natures such as electronic natures of metals with their crystallite sizes by altering the adsorption characteristics of the surface COx. Most of the research based on C1 chemistry has focused on the developments of more efficient and stable transition metal-based catalysts for syngas conversions with a higher selectivity to the desired chemicals.

The present Special Issue focuses on the fundamental investigations to develop novel heterogeneous catalysts for the productions of chemical intermediates as well as clean fuels based on C1 chemistry from alternative feedstock such as natural gas and COx. Both fundamental and applied research in terms of novel catalytic systems and gas-phases reactions by environmentally benign processes are sincerely invited, especially in the fields of C1 chemistry-based heterogeneous catalysis.

Prof. Jong Wook Bae
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 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

  • Hydrogenation of COx
  • Syngas conversion
  • Clean Fuels
  • Chemical Intermediates
  • Heterogeneous Catalysis
  • C1 chemistry

Published Papers (3 papers)

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Research

12 pages, 1837 KiB  
Article
Effects of Sn Promoter on the Ordered Mesoporous Co3O4-Al2O3 Mixed Metal Oxide for Fischer–Tropsch Synthesis Reaction
by Dongming Shen, Sang Beom Han, Xu Wang, Mansoor Ali and Jong Wook Bae
Catalysts 2022, 12(11), 1447; https://doi.org/10.3390/catal12111447 - 15 Nov 2022
Cited by 2 | Viewed by 1233
Abstract
The highly ordered mesoporous Co3O4-Al2O3 bimetal oxide, prepared by a nano-casting method, was modified with Sn promoter (denoted as Sn/m-CoAlOx) to enhance selectivity to liquid-hydrocarbons as well as to suppress CO2 formation formed by a [...] Read more.
The highly ordered mesoporous Co3O4-Al2O3 bimetal oxide, prepared by a nano-casting method, was modified with Sn promoter (denoted as Sn/m-CoAlOx) to enhance selectivity to liquid-hydrocarbons as well as to suppress CO2 formation formed by a water gas-shift (WGS) reaction activity during CO hydrogenation to hydrocarbons (Fischer–Tropsch Synthesis (FTS) reaction). Based on the surface properties of the Sn/m-CoAlOx in the range of 0.25–0.65 wt%Sn, the Sn promoter generally decreased CO conversion and increased C5+ selectivity through its non-selective blockages of the active metallic cobalt sites, which were responsible for more difficult reducibility of cobalt nanoparticles with an increase of Sn content as well. In addition to those contributions of Sn promoter, the decreased CO2 and CH4 selectivity was clearly observed on the optimal Sn(2)/m-CoAlOx with only small decrease of CO conversion with 79.1% from 81.5% for the reference m-CoAlOx. Those phenomena were mainly attributed to the suppressed WGS reaction activity as well as the decreased hydrogenation activity to form CH4 due to the suppressed H2 adsorption capacity on the less reduced surface Co sites on the Sn(2)/m-CoAlOx. Full article
(This article belongs to the Special Issue Catalysis for Environmentally Benign Production of Alternative Fuels)
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15 pages, 5681 KiB  
Article
Efficient Cross-Coupling of Acetone with Linear Aliphatic Alcohols over Supported Copper on a Fluorite-Type Pr2Zr2O7
by Suhyun Lim, Minseok Kim, Sang Hyeok Ko, Jae-Hong Lee, Joon Hyun Baik and Young-Woong Suh
Catalysts 2022, 12(10), 1279; https://doi.org/10.3390/catal12101279 - 20 Oct 2022
Viewed by 1391
Abstract
In cross-coupling of biomass-derived acetone and alcohols contributing to the production of carbon-elongated chemicals and fuels, the essential catalyst components are metal dispersion for alcohol dehydrogenation and, more importantly, basicity for carbon–carbon coupling. Herein, we report the potential of co-precipitated praseodymia–zirconia solid solution [...] Read more.
In cross-coupling of biomass-derived acetone and alcohols contributing to the production of carbon-elongated chemicals and fuels, the essential catalyst components are metal dispersion for alcohol dehydrogenation and, more importantly, basicity for carbon–carbon coupling. Herein, we report the potential of co-precipitated praseodymia–zirconia solid solution (Pr2Zr2O7) as a support of Cu catalyst for the conversion of acetone and butanol into C7 and C11 products. Cu/Pr2Zr2O7 exhibits a high yield of C7 and C11 (ca. 84%) compared to Cu/ZrO2 and Cu/PrO1.83. Moreover, it is robust under the employed solvent-free conditions owing to a solid solution of Pr2Zr2O7 compared to PrO1.83 showing phase transition to PrOHCO3. It is also tolerant to up to 5 wt % water of the reactant mixture, recyclable once adequate post-treatment is employed after the reaction, and can convert the acetone–butanol–ethanol mixture into C5–C11 products at the nearly equivalent yield (82%) to the acetone–butanol mixture. Therefore, the Cu/Pr2Zr2O7 reported herein is an efficient catalyst for the coupling of acetone with linear aliphatic alcohols into biofuel precursors. Full article
(This article belongs to the Special Issue Catalysis for Environmentally Benign Production of Alternative Fuels)
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15 pages, 3953 KiB  
Article
CO2 Hydrogenation on NixMg1−xAl2O4: A Comparative Study of MgAl2O4 and NiAl2O4
by Boseok Seo, Eun Hee Ko, Jinho Boo, Minkyu Kim, Dohyung Kang and No-Kuk Park
Catalysts 2021, 11(9), 1026; https://doi.org/10.3390/catal11091026 - 24 Aug 2021
Cited by 7 | Viewed by 2339
Abstract
Due to the increasing attention focused on global warming, many studies on reducing CO2 emissions and developing sustainable energy strategies have recently been performed. One of the approaches is CO2 methanation, transforming CO2 into methane. Such transformation (CO2 + [...] Read more.
Due to the increasing attention focused on global warming, many studies on reducing CO2 emissions and developing sustainable energy strategies have recently been performed. One of the approaches is CO2 methanation, transforming CO2 into methane. Such transformation (CO2 + 4H2 → CH4 + 2H2O) provides advantages of carbon liquification, storage, etc. In this study, we investigated CO2 methanation on nickel–magnesium–alumina catalysts both experimentally and computationally. We synthesized the catalysts using a precipitation method, and performed X-ray diffraction, temperature-programmed reduction, and N2 adsorption–desorption tests to characterize their physical and chemical properties. NiAl2O4 and MgAl2O4 phases were clearly observed in the catalysts. In addition, we conducted CO2 hydrogenation experiments by varying with temperatures to understand the reaction. Our results showed that CO2 conversion increases with Ni concentration and that MgAl2O4 exhibits high selectivity for CO. Density functional theory calculations explained the origin of this selectivity. Simulations predicted that adsorbed CO on MgAl2O4(100) weakly binds to the surface and prefers to desorb from the surface than undergoing further hydrogenation. Electronic structure analysis showed that the absence of a d orbital in MgAl2O4(100) is responsible for the weak binding of CO to MgAl2O4. We believe that this finding regarding the origin of the CO selectivity of MgAl2O4 provides fundamental insight for the design methanation catalysts. Full article
(This article belongs to the Special Issue Catalysis for Environmentally Benign Production of Alternative Fuels)
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