Methane Activation by Heterogeneous Catalysis
Raimund Horn,Robert Schlögl +1 more
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TLDR
In this article, the authors present a review of recent results and developments in heterogeneous catalytic methane conversion to synthesis gas, hydrogen cyanide, ethylene, methanol, formaldehyde, methyl chloride, methyl bromide and aromatics.Abstract:
Methane activation by heterogeneous catalysis will play a key role to secure the supply of energy, chemicals and fuels in the future. Methane is the main constituent of natural gas and biogas and it is also found in crystalline hydrates at the continental slopes of many oceans and in permafrost areas. In view of this vast reserves and resources, the use of methane as chemical feedstock has to be intensified. The present review presents recent results and developments in heterogeneous catalytic methane conversion to synthesis gas, hydrogen cyanide, ethylene, methanol, formaldehyde, methyl chloride, methyl bromide and aromatics. After presenting recent estimates of methane reserves and resources the physico-chemical challenges of methane activation are discussed. Subsequent to this recent results in methane conversion to synthesis gas by steam reforming, dry reforming, autothermal reforming and catalytic partial oxidation are presented. The high temperature methane conversion to hydrogen cyanide via the BMA-process and the Andrussow-process is considered as well. The second part of this review focuses on one-step conversion of methane into chemicals. This includes the oxidative coupling of methane to ethylene mediated by oxygen and sulfur, the direct oxidation of methane to formaldehyde and methanol, the halogenation and oxy-halogenation of methane to methyl chloride and methyl bromide and finally the non-oxidative methane aromatization to benzene and related aromates. Opportunities and limits of the various activation strategies are discussed. .read more
Citations
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Direct Conversion of Methane to Value-Added Chemicals over Heterogeneous Catalysts: Challenges and Prospects
TL;DR: This work focuses mainly on the fundamentals of C-H activation and analyzes the reaction pathways toward selective routes of OCM, MDA, and MTOAH to provide some insights into their reaction mechanisms and implications for future development of highly selective catalysts for direct conversion of methane to high value-added chemicals.
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Strategies for the direct catalytic valorization of methane using heterogeneous catalysis:challenges and opportunities
Alma I. Olivos-Suarez,Ágnes Szécsényi,Ágnes Szécsényi,Emiel Emiel Hensen,Javier Ruiz-Martínez,Javier Ruiz-Martínez,Evgeny A. Pidko,Jorge Gascon +7 more
TL;DR: In this paper, the main challenges to be addressed in the development of heterogeneous catalysts for the direct functionalization of methane are highlighted and highlighted possible paths to overcome these problems.
Journal ArticleDOI
Understanding trends in C-H bond activation in heterogeneous catalysis
Allegra A. Latimer,Ambarish Kulkarni,Hassan Aljama,Joseph Montoya,Jong Suk Yoo,Charlie Tsai,Frank Abild-Pedersen,Frank Abild-Pedersen,Felix Studt,Felix Studt,Jens K. Nørskov,Jens K. Nørskov +11 more
TL;DR: It is shown that, for the wide range of catalysts that proceed via a radical intermediate, a unifying framework for predicting C-H activation barriers using a single universal descriptor can be established.
Journal ArticleDOI
Direct Conversion of Methane to Methanol under Mild Conditions over Cu-Zeolites and beyond
Patrick Tomkins,Patrick Tomkins,Marco Ranocchiari,Jeroen A. van Bokhoven,Jeroen A. van Bokhoven +4 more
TL;DR: The isothermal and the high temperature activated processes have different properties and should be treated independently, from both an experimental and a mechanistic point of view.
Journal ArticleDOI
Ceria-based model catalysts: fundamental studies on the importance of the metal–ceria interface in CO oxidation, the water–gas shift, CO2 hydrogenation, and methane and alcohol reforming
José A. Rodriguez,José A. Rodriguez,David C. Grinter,Zongyuan Liu,Robert M. Palomino,Sanjaya D. Senanayake +5 more
TL;DR: Several studies with model ceria catalysts have shown the importance of strong metal-support interactions and a substantial body of knowledge has been acquired and concepts have been developed for a more rational approach to the design of novel technical catalysts containing ceria.
References
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