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Metal Dispersed on Porous Supports as Catalysts for Methane-Related Reactions
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Metal Dispersed on Porous Supports as Catalysts for Methane-Related Reactions

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

Deadline for manuscript submissions: closed (31 July 2021) | Viewed by 8246

Special Issue Editors

Prof. Dr. Nissrine El Hassan

E-Mail Website
Guest Editor
Petroleum Engineering Program, School of Engineering, Lebanese American University, Byblos P.O. Box 36, Lebanon
Interests: catalysis; mesoporous materials; nanomaterials; chemical engineering
Prof. Dr. Pascale Massiani

E-Mail Website
Guest Editor
UMR CNRS 7197 – UPMC, Sorbonne Universite, Paris, France
Interests: Microporous and mesoporous materials; nanomaterials; heterogeneous catalysis for environment and energy

Special Issue Information

Dear Colleagues,

This Special Issue of “Metal Dispersed on Porous Supports for Catalytic Methane-Related Reactions” is devoted to the search for new catalysts based on porous supports for reactions targeting the valorization of both methane and carbon dioxide. This includes such processes as the dry or steam reforming of methane (respectively DRM and SRM), methane decomposition (CMD), and CO2 methanation.

Submissions to this Special Issue in the form of original research papers and/or short reviews that reflect the current state of research in the fields of methane transformation—from catalyst syntheses to characterization and catalytic performance testing—are all welcome.

These reactions have gained significant importance in the last decade. Present efforts target the use of active phases based on metals other than noble metals, which are rare and expensive, but that are able to face carbon deposition and metal sintering phenomena at the high temperatures required by the reaction. Several strategies are used to overcome these drawbacks: 1) addition of a basic promoter that can facilitate carbon gasification; 2) confinement of the active phase in the porosity of the support to prevent metal nanoparticle growth and carbon nanotube formation; 3) enhancement of the interaction of the metal with its support to stabilize the formation of reduced metal nanoparticles after activation of the catalysts.

The focus of this Special Issue will be the stabilization of active phase in or on porous supports, since such a strategy enables, at the same time, stabilization against sintering and minimization of deactivating carbon derivatives deposition.

This Special Issue will be attractive to researchers whose activities belong to the areas of physical chemistry, materials science, or applied catalysis and are focused on the studies of catalysts for methane and/or carbon dioxide valorization. Contributions dedicated to the development of the catalysts are also welcome.

Prof. Dr. Nissrine El Hassan
Prof. Dr. Pascale Massiani
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

  • metal nanoparticles
  • porous supports
  • reforming of methane
  • methane decomposition
  • methanation
  • heterogeneous catalysis
  • active phase stabilization
  • CO2 valorization
  • resistance to sintering
  • carbon nanotube formation

Published Papers (3 papers)

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Research

10 pages, 3033 KiB  
Article
Preparation of Eggshell-Type Ru/Al2O3 Catalysts for Hydrogen Production Using Steam-Methane Reforming on PEMFC
by Jong-Heon Lee, Seongbin Jo, Tae-Young Kim, Jin-Hyeok Woo, Yeji Lee, Min-Seok Kim, Hye-Ok Park, Soo-Chool Lee and Jae-Chang Kim
Catalysts 2021, 11(8), 951; https://doi.org/10.3390/catal11080951 - 09 Aug 2021
Cited by 2 | Viewed by 2127
Abstract
Ru-based eggshell-type catalysts, in which Ru is located at the outer region of the pellet, were prepared by the impregnation method, using spherically shaped γ-Al2O3 pellets for steam-methane reforming (SMR). Ru was only supported on the external region of the [...] Read more.
Ru-based eggshell-type catalysts, in which Ru is located at the outer region of the pellet, were prepared by the impregnation method, using spherically shaped γ-Al2O3 pellets for steam-methane reforming (SMR). Ru was only supported on the external region of the pellet because of the strong interaction between its precursor and the alumina pellet. The Ru precursor penetrated the inside of the pellet by adding nitric acid to the impregnation solution. The distribution and thickness of the Ru layer in the catalyst can be controlled using the HNO3/Ru molar ratio and contact time at the impregnation step. Among the catalysts, the graded eggshell-type catalyst showed the highest activity and long-term stability in the SMR reaction. In addition, in the daily startup and shutdown (DSS) operation, similar to the hydrogen production environment for domestic polymer electrolyte membrane fuel cells (PEMFC), the graded eggshell-type catalyst showed high activity and stability after multiple cycles. Based on the experimental studies, it was confirmed that Ru-based catalysts are suitable for steam-methane reforming for PEMFC. Full article
(This article belongs to the Special Issue Metal Dispersed on Porous Supports as Catalysts for Methane-Related Reactions)
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17 pages, 4586 KiB  
Article
Optimization of Synthesis Conditions of Ni/SBA-15 Catalysts: Confined Nanoparticles and Improved Stability in Dry Reforming of Methane
by Marie-Nour Kaydouh, Nissrine El Hassan, Anne Davidson and Pascale Massiani
Catalysts 2021, 11(1), 44; https://doi.org/10.3390/catal11010044 - 31 Dec 2020
Cited by 12 | Viewed by 2775
Abstract
Despite its economic and environmental advantages, the dry reforming of methane using supported Ni-based catalysts remains challenging due to problems of metal particle sintering and carbon deposition, which lead to loss in catalytic activity. In this study, different silica supports, containing 5 wt% [...] Read more.
Despite its economic and environmental advantages, the dry reforming of methane using supported Ni-based catalysts remains challenging due to problems of metal particle sintering and carbon deposition, which lead to loss in catalytic activity. In this study, different silica supports, containing 5 wt% nickel, were prepared and characterized by N2 sorption, XRD, TPR, and TEM/SEM, in addition to Raman and TGA/MS for the spent catalysts. Different synthesis conditions were thus varied, like nickel deposition method, nature of nickel precursor salt, conditions for thermal activation, and nature of support. The results showed that enhanced metal dispersion, good confinement, and efficient stabilization of the active phase inside the pores can be achieved by using a well-structured mesoporous support. Moreover, it was demonstrated that carbon resistance can be improved when small nickel particles are well confined inside the pores. The strategies that affect the final dispersion of nickel particles, their consequent confinement inside (or deposition outside) the mesopores and the resulting catalytic activity and stability include mainly the application of hydrothermal treatment to the support, the variation of the nature of nickel precursor salt, and the conditions for thermal activation. General guidelines for the preparation of suitable Ni-based catalysts highly active and stable for dry reforming of methane (DRM) are thus presented in this work. Full article
(This article belongs to the Special Issue Metal Dispersed on Porous Supports as Catalysts for Methane-Related Reactions)
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14 pages, 2498 KiB  
Article
H2 Production from Catalytic Methane Decomposition Using Fe/x-ZrO2 and Fe-Ni/(x-ZrO2) (x = 0, La2O3, WO3) Catalysts
by Fahad Al-Mubaddel, Samsudeen Kasim, Ahmed A. Ibrahim, Abdulrhman S. Al-Awadi, Anis H. Fakeeha and Ahmed S. Al-Fatesh
Catalysts 2020, 10(7), 793; https://doi.org/10.3390/catal10070793 - 16 Jul 2020
Cited by 17 | Viewed by 2649
Abstract
An environmentally-benign way of producing hydrogen is methane decomposition. This study focused on methane decomposition using Fe and Fe-Ni catalysts, which were dispersed over different supports by the wet-impregnation method. We observed the effect of modifying ZrO2 with La2O3 [...] Read more.
An environmentally-benign way of producing hydrogen is methane decomposition. This study focused on methane decomposition using Fe and Fe-Ni catalysts, which were dispersed over different supports by the wet-impregnation method. We observed the effect of modifying ZrO2 with La2O3 and WO3 in terms of H2 yield and carbon deposits. The modification led to a higher H2 yield in all cases and WO3-modified support gave the highest yield of about 90% and was stable throughout the reaction period. The reaction conditions were at 1 atm, 800 °C, and 4000 mL(hgcat)−1 space velocity. Adding Ni to Fe/x-ZrO2 gave a higher H2 yield and stability for ZrO2 and La2O3 + ZrO2-supported catalysts whose prior performances and stabilities were very poor. Catalyst samples were analyzed by characterization techniques like X-ray diffraction (XRD), nitrogen physisorption, temperature-programmed reduction (TPR), thermo-gravimetric analysis (TGA), and Raman spectroscopy. The phases of iron and the supports were identified using XRD while the BET revealed a significant decrease in the specific surface areas of fresh catalysts relative to supports. A progressive change in Fe’s oxidation state from Fe3+ to Fe0 was observed from the H2-TPR results. The carbon deposits on Fe/ZrO2 and Fe/La2O3 + ZrO2 are mainly amorphous, while Fe/WO3 + ZrO2 and Fe-Ni/x-ZrO2 are characterized by graphitic carbon. Full article
(This article belongs to the Special Issue Metal Dispersed on Porous Supports as Catalysts for Methane-Related Reactions)
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