scholarly journals Conversion of methane to C2 and C3 hydrocarbons over TiO2/ZSM-5 core–shell particles in an electric field

RSC Advances ◽  
2019 ◽  
Vol 9 (60) ◽  
pp. 34793-34803 ◽  
Author(s):  
Qiao Han ◽  
Atsuhiro Tanaka ◽  
Masayuki Matsumoto ◽  
Akira Endo ◽  
Yoshihiro Kubota ◽  
...  
Keyword(s):  
Electric Field ◽  
Oxidative Coupling ◽  
Oxidative Coupling Of Methane ◽  
Composite Catalyst ◽  
Core Shell ◽  
Conversion Of Methane ◽  
Shell Particles

A TiO2/ZSM-5 composite catalyst efficiently works for the oxidative coupling of methane and the subsequent ethylene-to-propylene reactions in an electric field.

Oxidative coupling of methane using carbon dioxide in an electric field over La–ZrO 2 catalyst at low external temperature

Fuel ◽  
2013 ◽  
Vol 107 ◽  
pp. 879-881 ◽  
Author(s):  
Kazumasa Oshima ◽  
Keisuke Tanaka ◽  
Tomohiro Yabe ◽  
Eiichi Kikuchi ◽  
Yasushi Sekine
Keyword(s):  
Carbon Dioxide ◽  
Electric Field ◽  
Oxidative Coupling ◽  
Oxidative Coupling Of Methane ◽  
External Temperature

scholarly journals Influence of Co2 on the Catalytic Performance Of La2O3/CeO2 and CaO/CeO2 Catalysts in the Oxidative Coupling of Methane

2013 ◽  
Vol 15 (1) ◽  
pp. 22-26 ◽  
Author(s):  
Barbara Litawa ◽  
Piotr Michorczyk ◽  
Jan Ogonowski
Keyword(s):  
Oxidative Coupling ◽  
Methane Conversion ◽  
Catalytic Properties ◽  
Catalytic Performance ◽  
Negative Influence ◽  
Oxidative Coupling Of Methane ◽  
Oxygen Mixture ◽  
Impregnation Method ◽  
Promoting Effect ◽  
Conversion Of Methane

In this work the La2O3/CeO2 (33 mol % of La) and CaO/CeO2 (33 mol % of Ca) catalysts were prepared by the impregnation method and characterized by XRD and CO2-TPD. The catalytic properties of the catalysts were tested in the OCM process at 1073 K using the methane/oxygen mixture of the mole ratio 3.7 or 2.5 additionally containing CO2 and helium balance. It was found that in the presence of both catalysts an addition of CO2 enhances the selectivity to the ethylene and ethane and it does not have any negative influence on methane conversion. In the case of the CaO/CeO2 catalyst the promoting effect of CO2 was the highest. When the partial pressure of CO2 equals to 39 kPa the increase in selectivity from 36 to 41% was noted while the conversion of methane equal to 19.4-19.7 %.

scholarly journals Selective electrochemical oxidative coupling of methane mediated by Sr2Fe1.5Mo0.5O6-δ and its chemical stability

2021 ◽  
Vol 4 (1) ◽  
Author(s):  
Kannan P. Ramaiyan ◽  
Luke H. Denoyer ◽  
Angelica Benavidez ◽  
Fernando H. Garzon
Keyword(s):  
Chemical Stability ◽  
Oxidative Coupling ◽  
Earth Metal ◽  
Value Added ◽  
Oxidative Coupling Of Methane ◽  
Oxidation Products ◽  
Oxidation Of Methane ◽  
Conversion Rates ◽  
Conversion Of Methane ◽  
Set Up

AbstractEfficient conversion of methane to value-added products such as olefins and aromatics has been in pursuit for the past few decades. The demand has increased further due to the recent discoveries of shale gas reserves. Oxidative and non-oxidative coupling of methane (OCM and NOCM) have been actively researched, although catalysts with commercially viable conversion rates are not yet available. Recently, $${{{{{{{\mathrm{Sr}}}}}}}}_2Fe_{1.5 + 0.075}Mo_{0.5}O_{6 - \delta }$$ Sr 2 F e 1.5 + 0.075 M o 0.5 O 6 − δ (SFMO-075Fe) has been reported to activate methane in an electrochemical OCM (EC-OCM) set up with a C2 selectivity of 82.2%1. However, alkaline earth metal-based materials are known to suffer chemical instability in carbon-rich environments. Hence, here we evaluated the chemical stability of SFMO in carbon-rich conditions with varying oxygen concentrations at temperatures relevant for EC-OCM. SFMO-075Fe showed good methane activation properties especially at low overpotentials but suffered poor chemical stability as observed via thermogravimetric, powder XRD, and XPS measurements where SrCO3 was observed to be a major decomposition product along with SrMoO3 and MoC. Nevertheless, our study demonstrates that electrochemical methods could be used to selectively activate methane towards partial oxidation products such as ethylene at low overpotentials while higher applied biases result in the complete oxidation of methane to carbon dioxide and water.

Ambient-temperature oxidative coupling of methane in an electric field by a cerium phosphate nanorod catalyst

2019 ◽  
Vol 55 (28) ◽  
pp. 4019-4022 ◽  
Author(s):  
Ayaka Sato ◽  
Shuhei Ogo ◽  
Keigo Kamata ◽  
Yuna Takeno ◽  
Tomohiro Yabe ◽  
...  
Keyword(s):  
Electric Field ◽  
Ambient Temperature ◽  
Oxidative Coupling ◽  
Oxidative Coupling Of Methane ◽  
Cerium Phosphate

The application of an electric field to a CePO4 nanorod catalyst enabled ambient-temperature oxidative coupling of methane to C2 hydrocarbons.

Oxidative Coupling of Methane over Mo-Sn Catalyst

2021 ◽  
Author(s):  
Lina Yan ◽  
Junfeng Zhang ◽  
Xiujuan Gao ◽  
Faen Song ◽  
Xiaoxing Wang ◽  
...  
Keyword(s):  
Hydrothermal Method ◽  
Oxidative Coupling ◽  
Oxidative Coupling Of Methane ◽  
Conversion Of Methane ◽  
C2 Hydrocarbons

A novel Mo-Sn catalyst for oxidative coupling of methane was designed by a hydrothermal method. At 650 °C, the conversion of methane was 8.6% and the selectivity of C2 hydrocarbons...

scholarly journals Nanorattles with tailored electric field enhancement

Nanoscale ◽  
2017 ◽  
Vol 9 (27) ◽  
pp. 9376-9385 ◽  
Author(s):  
Max J. Schnepf ◽  
Martin Mayer ◽  
Christian Kuttner ◽  
Moritz Tebbe ◽  
Daniel Wolf ◽  
...  
Keyword(s):  
Electric Field ◽  
Field Enhancement ◽  
Core Shell ◽  
Electric Field Enhancement ◽  
Metallic Core ◽  
Dielectric Spacer ◽  
Shell Particles

Nanorattles are metallic core–shell particles with core and shell separated by a dielectric spacer.

scholarly journals Electric Field and Mobile Oxygen Promote Low-Temperature Oxidative Coupling of Methane over La1–xCaxAlO3−δ Perovskite Catalysts

ACS Omega ◽  
2019 ◽  
Vol 4 (6) ◽  
pp. 10438-10443 ◽  
Author(s):  
Ayaka Sato ◽  
Shuhei Ogo ◽  
Yuna Takeno ◽  
Kent Takise ◽  
Jeong Gil Seo ◽  
...  
Keyword(s):  
Low Temperature ◽  
Electric Field ◽  
Oxidative Coupling ◽  
Oxidative Coupling Of Methane ◽  
Perovskite Catalysts ◽  
Mobile Oxygen
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