Study of Novel Catalysts for Methane Conversion

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Catalysis in Organic and Polymer Chemistry".

Deadline for manuscript submissions: 31 May 2024 | Viewed by 1340

Special Issue Editors

Ames Laboratory, Iowa State University, Ames, IA, USA
Interests: heterogeneous catalysis; C-H activation; zeolite; methane conversion; catalyst synthesis
Ames Laboratory, Iowa State University, Ames, IA, USA
Interests: homogeneous catalysis; small molecule activation; electrochemistry

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Guest Editor
Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore, Singapore
Interests: catalysis; CO2 conversion; hydrogen production

Special Issue Information

Dear Colleagues,

Methane, as the main component of natural gas/shale gas, is one of the most important energy sources and carbon feedstocks. An essential approach to methane utilization is the efficient conversion of methane to produce value-added chemicals, such as methanol, olefins, carboxylic acids and other materials, that are broadly used in industrial applications.

Recently, different types of novel catalysts have been designed and developed to achieve the high catalytic performance of methane activation/functionalization through various reactions. By conducting fundamental studies, theoretical calculations and in situ/operando characterization, the structure of catalysts could be investigated, and the mechanism of the reactions could be explored.

This Special Issue aims to provide insights into applications of methane transformation by collecting papers that are related to the critical understanding and efficient application of catalysts for methane transformation.

Dr. Yuting Li
Dr. Lun An
Dr. Nikita Dewangan 
Guest Editors

Manuscript Submission Information

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Keywords

  • methane conversion
  • value-added products
  • C-H activation
  • C-H functionalization
  • catalysis
  • heterogeneous
  • homogeneous

Published Papers (1 paper)

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Research

19 pages, 5500 KiB  
Article
Catalytic Decomposition of CH4 to Hydrogen and Carbon Nanotubes Using the Pt(1)-Fe(30)/MCM-41 Catalyst
by Ho Joon Seo
Catalysts 2024, 14(4), 282; https://doi.org/10.3390/catal14040282 - 20 Apr 2024
Viewed by 886
Abstract
The catalytic decomposition of CH4 to H2 and carbon nanotubes (CNTs) was investigated regarding Pt(1)-Fe(30)/MCM-41 and Fe(30)/MCM-41 using a fixed-bed flow reactor under an atmosphere. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission [...] Read more.
The catalytic decomposition of CH4 to H2 and carbon nanotubes (CNTs) was investigated regarding Pt(1)-Fe(30)/MCM-41 and Fe(30)/MCM-41 using a fixed-bed flow reactor under an atmosphere. X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS), transmission electron microscope (TEM), and Raman spectroscopy were used to characterize the behavior of Pt(1)-Fe(30)/MCM-41 and Fe(30)/MCM-41. The hydrogen yield of Pt(1)-Fe(30)/MCM-41 was 3.2 times higher than that of Fe(30)/MCM-41. When 1 wt% of Pt was added to Fe(30)/MCM-41(Mobil Composition of Matter No. 41), the atomic percentage of Fe2p increased from 13.39% to 16.14% and the core Fe2p1/2 electron levels of Fe0 and Fe2+ chemically shifted to lower energies (0.2 eV and 0.1 eV, respectively) than those of Fe(30)/MCM-41. The Fe, Pt, Si, and O nanoparticles were uniformly distributed on the catalyst surface, and the average iron particle sizes of the Pt(1)-Fe(30)/MCM-41 and Fe(30)/MCM-41 were about 33.4 nm and 58.5 nm, respectively. This is attributed to the uniform distribution of the nano-sized iron particles on the MCM-41 surface, which was due to the suitable metal-carrier interaction (SMCI) between Fe, Pt, and MCM-41 and the high reduction degree of Fe due to the spillover effect of H2 from Pt to Fe. Pt(1)-Fe(30)/MCM-41 produced multiwalled CNTs and bamboo-shaped CNTs with high crystallinity and graphitization degree using the tip-growth mechanism, with an ID/IG ratio of 0.93 and a C(101)/C(002) ratio of 0.64. Full article
(This article belongs to the Special Issue Study of Novel Catalysts for Methane Conversion)
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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: Non-oxidative coupling of methane catalyzed by heterogeneous catalysts containing singly dispersed metal sites
Authors: Yuting Li; Lun An; Jie Zhang
Affiliation: US DOE Ames National Laboratory, Iowa State University, Ames IA
Abstract: Direct upgrading of methane into value-added products is one of the most significant technologies for the effective transformation of hydrocarbon feedstocks in the chemical industry. Both oxidative and non-oxidative methane conversion are broadly useful approaches, though the two reaction pathways are quite distinguished. Oxidative coupling of methane (OCM) has been widely studied but suffers from the low selectivity to C2 hydrocarbons because of the overoxidation leading to undesired byproducts. Recently, heterogeneous catalysts comprising singly dispersed metal sites, such as single-atom catalysts (SAC) and surface organometallic catalysts (SOMCat), have been proved to be effectively active for direct coupling methane to product hydrogen and C2 products. In this context, this review summarizes recent discoveries of these novel catalysts and provide a perspective of promising catalytic processes for methane transformation via non-oxidative coupling.

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