Heterogeneous Catalysis of First Row Transition Metals and Oxides: Kinetic and Experimental Studies

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

Deadline for manuscript submissions: closed (30 April 2025) | Viewed by 2054

Special Issue Editors


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Guest Editor
Chemical Engineering Department, Brigham Young University, Provo, UT 84602, USA
Interests: heterogeneous catalysis; energy engineering; plasma reactions; coal gasification; carbon dioxide capture and storage
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Guest Editor
Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA
Interests: oxidative dehydrogenation; CO2 hydrogenation; nickel; copper; metal-organic frameworks

Special Issue Information

Dear Colleagues,

Production and conversion of light alkanes are fundamental research areas in heterogeneous catalysis in which first-row transition metals and their oxides play important roles, due to their effectiveness, low cost, and abundance. Examples like vanadium, iron, cobalt, and nickel are used in reactions as varied as oxidative dehydrogenation of light alkanes, Fischer–Tropsch synthesis, methanation, and many others that either produce light alkanes or convert them to more valuable compounds. These metals and metal oxides with 3D electrons have the potential for multiple oxidation states as well as defect sites and vacancies that influence the production or conversion of light hydrocarbons. Papers examining surface chemistry, stoichiometric/non-stoichiometric surface oxides, and other surface science investigations of their effect on catalysis are especially invited. Further, submissions discussing micro-kinetics, elementary step analysis, and rate laws are welcome and encouraged.

Dr. Morris D. Argyle
Dr. Kara J. Stowers
Guest Editors

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Keywords

  • first-row transition metals and oxides
  • heterogeneous catalysis
  • light alkane conversion and formation
  • elementary steps
  • rate laws
  • oxidative dehydrogenation
  • Fischer–Tropsch

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Published Papers (1 paper)

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Research

21 pages, 6075 KiB  
Article
Surface Chemical Effects on Fischer–Tropsch Iron Oxide Catalysts Caused by Alkali Ion (Li, Na, K, Cs) Doping
by Mirtha Z. Leguizamón León Ribeiro, Joice C. Souza, Igor Ferreira Gomes, Muthu Kumaran Gnanamani, Michela Martinelli, Gary Jacobs and Mauro Celso Ribeiro
Catalysts 2024, 14(10), 682; https://doi.org/10.3390/catal14100682 - 2 Oct 2024
Viewed by 1523
Abstract
Among the alkali metals, potassium is known to significantly shift selectivity toward value-added, heavier alkanes and olefins in iron-based Fischer–Tropsch synthesis catalysts. The aim of the present contribution is to shed light on the mechanism of action of alkaline promoters through a systematic [...] Read more.
Among the alkali metals, potassium is known to significantly shift selectivity toward value-added, heavier alkanes and olefins in iron-based Fischer–Tropsch synthesis catalysts. The aim of the present contribution is to shed light on the mechanism of action of alkaline promoters through a systematic study of the structure–reactivity relationships of a series of Fe oxide FTS catalysts promoted with Group I (Li, Na, K, Cs) alkali elements. Reactivity data are compared to structural data based on in situ, synchrotron-based XRD and XPS, as well as temperature-programmed studies (TPR-H2, TPC-CO, TPD-CO2, and TPD-H). It has been observed that the alkali elements induced higher carburization rates, higher basicities, and lower adsorbed hydrogen coverages. Catalyst stability followed the trend Na-Fe > unpromoted > Li-Fe > K-Fe > Cs-Fe, being consistent with the ability of the alkali (Na) to prevent active site loss by catalyst reoxidation. Potassium was the most active in promoting high α hydrocarbon formation. It is active enough to promote CO dissociative adsorption (and the formation of FeCx active phases) and decrease the surface coverage of H-adsorbed species, but it is not so active as to cause premature catalyst deactivation by the formation of a carbon layer resulting in the blocking active sites. Full article
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