scholarly journals Research Trends in Development of Highly Active Single Metal Oxide Catalyst for Oxidative Coupling of Methane

Ceramist ◽  
2021 ◽  
Vol 24 (4) ◽  
pp. 438-445
Author(s):  
Goune Choi ◽  
Bonjae Koo
Keyword(s):  
Metal Oxide ◽  
Metal Oxides ◽  
Oxidative Coupling ◽  
Earth Metal ◽  
Value Added ◽  
Oxidative Coupling Of Methane ◽  
Highly Active ◽  
Surface Basicity ◽  
Alkaline Earth Metal Oxides ◽  
Single Metal Oxide

The conversion of methane to a value-added chemical is important for methane utilization and industrial demand for primary chemicals. Oxidative coupling of methane (OCM) to C2 hydrocarbons is one of the most attractive ways to use natural gas. However, it is difficult to obtain higher C2 yield in classic OCM reaction due to a favorable COx formation. Regarding this, various catalysts for OCM have been studied to fulfill desirable C2 yields. In this review, we briefly overview the single metal oxide types of OCM catalysts (alkaline-earth metal oxides and rare-earth metal oxides) and highlight the characteristics of catalysts in OCM reaction such as methane activation, surface basicity and lattice oxygen.

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.

Investigation of metal oxide additives onto Na2WO4-Ti/SiO2 catalysts for oxidative coupling of methane to value-added chemicals

2020 ◽  
Vol 358 ◽  
pp. 263-269
Author(s):  
Sarannuch Sringam ◽  
Phattaradit Kidamorn ◽  
Thanaphat Chukeaw ◽  
Metta Chareonpanich ◽  
Anusorn Seubsai
Keyword(s):  
Metal Oxide ◽  
Oxidative Coupling ◽  
Value Added ◽  
Oxidative Coupling Of Methane

Catalytic oxidative coupling of methane over alkali, alkaline earth and rare earth metal oxides

1988 ◽  
Vol 39 ◽  
pp. 185-190 ◽  
Author(s):  
Bi Yingli ◽  
Zhen Kaiji ◽  
Jiang Yutao ◽  
Teng Chiwen ◽  
Yang Xiangguong
Keyword(s):  
Rare Earth ◽  
Metal Oxides ◽  
Rare Earth Metal ◽  
Oxidative Coupling ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Oxidative Coupling Of Methane ◽  
Rare Earth Metal Oxides

scholarly journals Oxidative Coupling of Methane: Perspective for High-Value C2 Chemicals

Crystals ◽  
2021 ◽  
Vol 11 (9) ◽  
pp. 1011
Author(s):  
Palle Ramana Murthy ◽  
Yang Liu ◽  
Guohao Wu ◽  
Yanan Diao ◽  
Chuan Shi
Keyword(s):  
Metal Oxide ◽  
Oxidative Coupling ◽  
Supported Catalysts ◽  
Active Oxygen Species ◽  
Earth Metal ◽  
Oxidative Coupling Of Methane ◽  
Oxide Catalysts ◽  
Metal Oxide Catalysts ◽  
Metal Doped ◽  
C2 Hydrocarbons

The oxidative coupling of methane (OCM) to C2 hydrocarbons (C2H4 and C2H6) has aroused worldwide interest over the past decade due to the rise of vast new shale gas resources. However, obtaining higher C2 selectivity can be very challenging in a typical OCM process in the presence of easily oxidized products such as C2H4 and C2H6. Regarding this, different types of catalysts have been studied to achieve desirable C2 yields. In this review, we briefly presented three typical types of catalysts such as alkali/alkaline earth metal doped/supported on metal oxide catalysts (mainly for Li doped/supported catalysts), modified transition metal oxide catalysts, and pyrochlore catalysts for OCM and highlighted the features that play key roles in the OCM reactions such as active oxygen species, the mobility of the lattice oxygen and surface alkalinity of the catalysts. In particular, we focused on the pyrochlore (A2B2O7) materials because of their promising properties such as high melting points, thermal stability, surface alkalinity and tunable M-O bonding for OCM reaction.

Low-temperature oxidative coupling of methane using alkaline earth metal oxide-supported perovskites

2020 ◽  
Vol 352 ◽  
pp. 127-133 ◽  
Author(s):  
Seoyeon Lim ◽  
Jae-Wook Choi ◽  
Dong Jin Suh ◽  
Ung Lee ◽  
Kwang Ho Song ◽  
...  
Keyword(s):  
Low Temperature ◽  
Metal Oxide ◽  
Oxidative Coupling ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Oxidative Coupling Of Methane ◽  
Alkaline Earth Metal ◽  
Alkaline Earth Metal Oxide

Basicities of alumina-supported alkaline earth metal oxides

1998 ◽  
Vol 65 (1) ◽  
pp. 83-86 ◽  
Author(s):  
Yu-Wen Chen ◽  
Hsueh-Ying Chen ◽  
Wen-Fa Lin
Keyword(s):  
Metal Oxides ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Alkaline Earth Metal ◽  
Alkaline Earth Metal Oxides

scholarly journals Increased hole mobility in anti-ThCr2Si2-type La2O2Bi co-sintered with alkaline earth metal oxides for oxygen intercalation and hole carrier doping

2021 ◽  
Author(s):  
Kota Matsumoto ◽  
Hideyuki Kawasoko ◽  
Noriaki Kimura ◽  
Tomoteru Fukumura
Keyword(s):  
Rare Earth ◽  
Metal Oxides ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Hole Mobility ◽  
Alkaline Earth Metal ◽  
Alkaline Earth Metal Oxides ◽  
Oxygen Intercalation ◽  
Axis Length ◽  
Carrier Doping

Metallic anti-ThCr2Si2-type RE2O2Bi (RE = rare earth) with Bi square nets show superconductivity while insulating La2O2Bi shows high hole mobility, by expanding the c-axis length through oxygen intercalation. In this...

Heats of Formation of Alkali Metal and Alkaline Earth Metal Oxides and Hydroxides:  Surprisingly Demanding Targets for High-Level ab Initio Procedures

2003 ◽  
Vol 107 (29) ◽  
pp. 5617-5630 ◽  
Author(s):  
Michael B. Sullivan ◽  
Mark A. Iron ◽  
Paul C. Redfern ◽  
Jan M. L. Martin ◽  
Larry A. Curtiss ◽  
...  
Keyword(s):  
Alkali Metal ◽  
Metal Oxides ◽  
Ab Initio ◽  
Alkaline Earth ◽  
Earth Metal ◽  
Heats Of Formation ◽  
Alkaline Earth Metal ◽  
Alkaline Earth Metal Oxides ◽  
High Level
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