Oxidative coupling of methane at elevated pressures: reactor concept and its validation

2018 ◽  
Vol 3 (2) ◽  
pp. 151-154 ◽  
Author(s):  
M. Albrecht ◽  
U. Rodemerck ◽  
D. Linke ◽  
E. V. Kondratenko
Keyword(s):  
Oxidative Coupling ◽  
High Pressures ◽  
Oxidative Coupling Of Methane ◽  
Elevated Pressures ◽  
High Pressures And Temperatures

A novel quartz reactor has been developed for heterogeneously catalysed reactions at high pressures and temperatures.

The accelerating effect of NH4Cl on gas phase reaction of oxidative coupling of methane at elevated pressures

1999 ◽  
Vol 179 (1-2) ◽  
pp. L1-L4 ◽  
Author(s):  
Yu Liu ◽  
Xuxia Liu ◽  
Ruiling Hou ◽  
Jinzhen Xue ◽  
Shuben Li ◽  
...  
Keyword(s):  
Gas Phase ◽  
Oxidative Coupling ◽  
Oxidative Coupling Of Methane ◽  
Phase Reaction ◽  
Gas Phase Reaction ◽  
Elevated Pressures

scholarly journals On the crystallisation temperature of very high-density amorphous ice

2018 ◽  
Vol 20 (18) ◽  
pp. 12589-12598 ◽  
Author(s):  
Josef N. Stern ◽  
Thomas Loerting
Keyword(s):  
Low Temperature ◽  
High Pressures ◽  
Solid Phase ◽  
Amorphous Solid ◽  
Amorphous Ice ◽  
Elevated Pressures ◽  
Temperature Boundary ◽  
Crystallisation Temperature ◽  
High Pressures And Temperatures ◽  
Very High

VHDA prepared at high pressures and temperatures appears to be mainly free of (nano)crystallinity. It is the thermally most stable amorphous solid phase of water at elevated pressures reported so far. Water's no man's land's low temperature boundary is thus shifted to higher temperatures by up to 4 K.

Wide-range equations of state for organic liquids

2007 ◽  
Vol 5 ◽  
pp. 113-120 ◽  
Author(s):  
R.Kh. Bolotnova
Keyword(s):  
High Pressures ◽  
Equations Of State ◽  
Organic Liquids ◽  
Liquid Phases ◽  
Wide Range ◽  
High Pressures And Temperatures

The method of construction the wide-range equations of state for organic liquids, describing the gas and liquid phases including dissociation and ionization which occurs during an intense collapse of steam bubbles and accompanied by ultra-high pressures and temperatures, is proposed.

scholarly journals Identification of the structure of the Bi promoted Pt non-oxidative coupling of methane catalyst: a nanoscale Pt3Bi intermetallic alloy

2019 ◽  
Vol 9 (6) ◽  
pp. 1349-1356 ◽  
Author(s):  
Johnny Zhu Chen ◽  
Zhenwei Wu ◽  
Xiaoben Zhang ◽  
Slgi Choi ◽  
Yang Xiao ◽  
...  
Keyword(s):  
Oxidative Coupling ◽  
Oxidative Coupling Of Methane ◽  
Intermetallic Alloy ◽  
Alloy Catalyst

Identification of a Pt3Bi nanoscale, surface intermetallic alloy catalyst for non-oxidative coupling of methane (NOCM).

Catalytic performance of Na-Mn2O3-based catalysts towards oxidative coupling of methane

2021 ◽  
Author(s):  
P. Saychu ◽  
M. Thanasiriruk ◽  
C. Khajonvittayakul ◽  
R. Viratikul ◽  
V. Tongnan ◽  
...  
Keyword(s):  
Oxidative Coupling ◽  
Catalytic Performance ◽  
Oxidative Coupling Of Methane

scholarly journals Nanosheet-Like Ho2O3 and Sr-Ho2O3 Catalysts for Oxidative Coupling of Methane

Catalysts ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 388
Author(s):  
Yuqiao Fan ◽  
Changxi Miao ◽  
Yinghong Yue ◽  
Weiming Hua ◽  
Zi Gao
Keyword(s):  
Oxidative Coupling ◽  
Temperature Programmed Desorption ◽  
Oxidative Coupling Of Methane ◽  
Molar Ratio ◽  
Impregnation Method ◽  
Oxygen Species ◽  
N2 Adsorption ◽  
Basic Sites ◽  
Chemisorbed Oxygen ◽  
Temperature Programmed

In this work, Ho2O3 nanosheets were synthesized by a hydrothermal method. A series of Sr-modified Ho2O3 nanosheets (Sr-Ho2O3-NS) with a Sr/Ho molar ratio between 0.02 and 0.06 were prepared via an impregnation method. These catalysts were characterized by several techniques such as XRD, N2 adsorption, SEM, TEM, XPS, O2-TPD (temperature-programmed desorption), and CO2-TPD, and they were studied with respect to their performances in the oxidative coupling of methane (OCM). In contrast to Ho2O3 nanoparticles, Ho2O3 nanosheets display greater CH4 conversion and C2-C3 selectivity, which could be related to the preferentially exposed (222) facet on the surface of the latter catalyst. The incorporation of small amounts of Sr into Ho2O3 nanosheets leads to a higher ratio of (O− + O2−)/O2− as well as an enhanced amount of chemisorbed oxygen species and moderate basic sites, which in turn improves the OCM performance. The optimal catalytic behavior is achievable on the 0.04Sr-Ho2O3-NS catalyst with a Sr/Ho molar ratio of 0.04, which gives a 24.0% conversion of CH4 with 56.7% selectivity to C2-C3 at 650 °C. The C2-C3 yield is well correlated with the amount of moderate basic sites present on the catalysts.

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