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Catalysts for Stable Molecules (CO2, CO, CH4...
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Catalysts for Stable Molecules (CO2, CO, CH4, NH3) Conversion

A special issue of Catalysts (ISSN 2073-4344).

Deadline for manuscript submissions: closed (30 June 2020) | Viewed by 12960

Special Issue Editor

Prof. Dr. Eun Duck Park

E-Mail Website
Guest Editor
1. Department of Chemical Engineering, Ajou University, Suwon 16499, Republic of Korea
2. Department of Energy Systems Research, Ajou University, Suwon 16499, Republic of Korea
Interests: C1 chemistry; methane activation; biomass conversion; CO oxidation; methanation
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

C1 gas including CO, CO2, and CH4 can be a starting material for the synthesis of value-added chemicals via a number of catalytic pathways. Besides C1 gas, ammonia is also an important building block for the N-containing chemicals. In this Special Issue of Catalysts, a number of recently updated research works on the activation and catalytic conversion of these stable molecules will be disclosed. The scope of this Special Issue of Catalysts encompasses all aspects of catalyst research on these stable molecules from the theoretical calculation to the catalyst screening for the homogeneous and/or heterogeneous catalysts.

Dr. Eun Duck Park
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

  • CO2 activation
  • CO2 conversion
  • CO2 reforming
  • CO2 hydrogenation
  • Dry reforming of methane, Methane activation
  • Methane conversion
  • Amination
  • Ammonia decomposition
  • Carbonylation
  • Hydroformylation
  • CO hydrogenation

Published Papers (3 papers)

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Research

9 pages, 1049 KiB  
Article
Selective Oxidation of Methane over Fe-Zeolites by In Situ Generated H2O2
by Jongkyu Kang and Eun Duck Park
Catalysts 2020, 10(3), 299; https://doi.org/10.3390/catal10030299 - 05 Mar 2020
Cited by 19 | Viewed by 3698
Abstract
Liquid-phase selective oxidation of methane into methane oxygenates, including methanol and formic acid, with molecular oxygen was investigated using Fe-zeolites and Pd/activated carbon in the presence of molecular hydrogen as a reducing agent. Various Fe-zeolites such as Fe-ZSM-5, Fe-mordenite, Fe-β, Fe-Y, and Fe-ferrierite [...] Read more.
Liquid-phase selective oxidation of methane into methane oxygenates, including methanol and formic acid, with molecular oxygen was investigated using Fe-zeolites and Pd/activated carbon in the presence of molecular hydrogen as a reducing agent. Various Fe-zeolites such as Fe-ZSM-5, Fe-mordenite, Fe-β, Fe-Y, and Fe-ferrierite were prepared by ion-exchange and compared for this reaction. Among them, Fe-ZSM-5 was selected for further study because this catalyst showed high activity in the selective oxidation of methane with relatively less leaching. Further, the effect of reaction temperature, pH, and the amount of catalyst was examined, and detailed investigations revealed that the leached Fe species, which were facilitated in the presence of acid, were mainly responsible for methane oxidation under the given reaction conditions. Full article
(This article belongs to the Special Issue Catalysts for Stable Molecules (CO2, CO, CH4, NH3) Conversion)
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11 pages, 4631 KiB  
Article
Oxidative Coupling of Methane over Mn2O3-Na2WO4/SiC Catalysts
by Jieun Kim, La-Hee Park, Jeong-Myeong Ha and Eun Duck Park
Catalysts 2019, 9(4), 363; https://doi.org/10.3390/catal9040363 - 15 Apr 2019
Cited by 17 | Viewed by 4899
Abstract
The oxidative coupling of methane (OCM) is operated at high temperatures and is a highly exothermic reaction; thus, hotspots form on the catalyst surface during reaction unless the produced heat is removed. It is crucial to control the heat formed because surface hotspots [...] Read more.
The oxidative coupling of methane (OCM) is operated at high temperatures and is a highly exothermic reaction; thus, hotspots form on the catalyst surface during reaction unless the produced heat is removed. It is crucial to control the heat formed because surface hotspots can degrade catalytic performance. Herein, we report the preparation of Mn2O3-Na2WO4/SiC catalysts using SiC, which has high thermal conductivity and good stability at high temperatures, and the catalyst was applied to the OCM. Two Mn2O3-Na2WO4/SiC catalysts were prepared by wet-impregnation on SiC supports having different particle sizes. For comparison, the Mn2O3-Na2WO4/SiO2 catalyst was also prepared by the same method. The catalysts were analyzed by nitrogen adsorption–desorption, X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. The transformation of SiC into α-cristobalite was observed for the Mn2O3-Na2WO4/SiC catalysts. Because SiC was completely converted into α-cristobalite for the nano-sized SiC-supported Mn2O3-Na2WO4 catalyst, the catalytic performance for the OCM reaction of Mn2O3-Na2WO4/n-SiC was similar to that of Mn2O3-Na2WO4/SiO2. However, only the surface layer of SiC was transformed into α-cristobalite for the micro-sized SiC (m-SiC) in Mn2O3-Na2WO4/m-SiC, resulting in a SiC@α-cristobalite core–shell structure. The Mn2O3-Na2WO4/m-SiC showed higher methane conversion and C2+ yield at 800 and 850 °C than Mn2O3-Na2WO4/SiO2. Full article
(This article belongs to the Special Issue Catalysts for Stable Molecules (CO2, CO, CH4, NH3) Conversion)
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14 pages, 5161 KiB  
Article
Defect-Rich Nickel Nanoparticles Supported on SiC Derived from Silica Fume with Enhanced Catalytic Performance for CO Methanation
by Qi Song, Xingwu Zhai, Feng Yu, Jiangbing Li, Xin Ren, Haiyang Zhang, Mingyuan Zhu, Bin Dai, Guixian Ge and Jinli Zhang
Catalysts 2019, 9(3), 295; https://doi.org/10.3390/catal9030295 - 24 Mar 2019
Cited by 7 | Viewed by 3910
Abstract
With the increased demands of environmental protection, recycling/utilization of industrial byproducts has attracted much attention from both industry and academic communities. In this work, silicon carbide (SiC) was successfully synthesized from industrial waste silica fume (SF) during metallic silicon production. Following this, Ni [...] Read more.
With the increased demands of environmental protection, recycling/utilization of industrial byproducts has attracted much attention from both industry and academic communities. In this work, silicon carbide (SiC) was successfully synthesized from industrial waste silica fume (SF) during metallic silicon production. Following this, Ni nanoparticles with many defects were supported on the as-obtained SiC by conventional impregnation method. The results showed that defect-rich Ni nanoparticles were dispersed onto the surface of SiC. The as-obtained Ni/SF-SiC exhibited an enhanced metal-support interaction between Ni and SiC. Furthermore, the density functional theory (DFT) calculations showed that the H2 and CO adsorption energy on Ni vacancy (VNi) sites of Ni/SF-SiC were 1.84 and 4.88 eV, respectively. Finally, the Ni/SF-SiC performed high catalytic activity with CO conversion of 99.1% and CH4 selectivity of 85.7% at 350 °C, 0.1 MPa and a gas hourly space velocity (GHSV) of 18,000 mL·g−1·h−1. Moreover, Ni/SF-SiC processed good catalytic stability in the 50 h continuous reaction. Full article
(This article belongs to the Special Issue Catalysts for Stable Molecules (CO2, CO, CH4, NH3) Conversion)
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