Journal ArticleDOI
Dehydrogenation and aromatization of methane under non-oxidizing conditions
Reads0
Chats0
TLDR
In this paper, a modified ZSM-5 zeolite catalysts with a fixed bed continuous-flow reactor and with a temperature programmed reactor were used for the de-hydrogenation and aromatization of methane.Abstract:
The dehydrogenation and aromatization of methane on modified ZSM-5 zeolite catalysts has been studied under non-oxidizing conditions with a fixed bed continuous-flow reactor and with a temperature programmed reactor. The results show that benzene is the only hydrocarbon product of the catalytic conversion of methane at high temperature (973 K). The catalytic activity of ZSM-5 is greatly improved by incorporating a metal cation (Mo or Zn). H2 and ethene have been directly detected in the products with a mass spectrometer during TPAR. A carbenium ion mechanism for the activation of methane is suggested.read more
Citations
More filters
Journal ArticleDOI
Catalytic dehydrogenation of light alkanes on metals and metal oxides.
TL;DR: The study compares different catalysts in terms of the reaction mechanism and deactivation pathways and catalytic performance, as dehydrogenation for the production of light olefins has become extremely relevant.
Journal ArticleDOI
CATALYTIC CONVERSION OF METHANE TO MORE USEFUL CHEMICALS AND FUELS: A CHALLENGE FOR THE 21st CENTURY
TL;DR: The potential for the production of ethylene or liquid hydrocarbon fuels has not been fully realized as mentioned in this paper, and a number of strategies are being explored at levels that range from fundamental science to engineering technology.
Journal ArticleDOI
Large Scale CVD Synthesis of Single-Walled Carbon Nanotubes
TL;DR: In this article, the synthesis of high quality single-walled carbon nanotubes (SWNTs) is accomplished by optimizing the chemical compositions and textural properties of the catalyst material used in the chemical vapor deposition (CVD) of methane.
Journal ArticleDOI
Direct, Nonoxidative Conversion of Methane to Ethylene, Aromatics, and Hydrogen
Xiaoguang Guo,Fang Guangzong,Gang Li,Gang Li,Hao Ma,Hongjun Fan,Liang Yu,Chao Ma,Xing Wu,Dehui Deng,Mingming Wei,Dali Tan,Rui Si,Shuo Zhang,Jianqi Li,Litao Sun,Zichao Tang,Xiulian Pan,Xinhe Bao +18 more
TL;DR: It is reported that single iron sites embedded in a silica matrix enable direct, nonoxidative conversion of methane, exclusively to ethylene and aromatics, representing an atom-economical transformation process of methane.
Journal ArticleDOI
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.
References
More filters
Journal ArticleDOI
The reaction of propane over ZSM-5-H and ZSM-5-Zn zeolite catalysts
T. Mole,J.R. Anderson,G. Creer +2 more
TL;DR: In this article, the zinc-exchanged (ZSM-5-Zn) and proton exchange (Proton exchange 5-H) forms of ZSM 5 zeolite have been studied for the conversion of propane to aromatic hydrocarbons at temperatures in the range 730-820 K.
Journal ArticleDOI
Prospects for the direct conversion of light alkanes to petrochemicalfeedstocks and liquid fuels - a review
TL;DR: In this paper, a review of recent progress in effecting the catalytic conversion of small alkanes, especially methane, into higher hydrocarbons such as alkenes or aromatics is reviewed.
Journal ArticleDOI
Oxidation of methane over H-ZSM5 and other catalysts
J.R. Anderson,P. Tsai +1 more
TL;DR: In this article, a flow system over an H-ZSM5 catalyst, using dioxygen and nitrous oxide as oxidants, was studied, and it was concluded that methanol is a primary oxidation product which may undergo further oxidation to formaldehyde and to carbon oxides, but which may also undergo conversion over the acidic catalyst to olefins and aromatics.
Journal ArticleDOI
Physicochemical characterization of MoO3-NaY zeolite catalysts
TL;DR: In this paper, a series of Mo-impregnated NaY zeolite catalysts, with a Mo loading in the range 1-15 wt%, MoO3, have been studied by X-ray diffraction, transmission electron microscopy, ir and diffuse reflectance spectroscopy, temperature-programmed reduction, specific surface area, water content, and extraction measurements, in order to characterize them structurally.
Journal ArticleDOI
Preparation of aromatic hydrocarbons from methane in the presence of O2
S. S. Shepelev,K. G. Ione +1 more
TL;DR: In this article, a dependence of the selectivity of this process on the chemical composition and structure of the zeolites and the pressure of the reaction mixture has been studied and a reaction mechanism for this process is suggested.