Mechanistic Study of Low-Temperature CO2 Hydrogenation over Modified Rh/Al2O3 Catalysts

ACS Catalysis ◽  
2016 ◽  
Vol 6 (9) ◽  
pp. 6275-6284 ◽  
Author(s):  
Denise Heyl ◽  
Uwe Rodemerck ◽  
Ursula Bentrup
Keyword(s):  
Low Temperature ◽  
Co2 Hydrogenation ◽  
Mechanistic Study

Highly Efficient Ru/CeO2 Catalyst for Formaldehyde Oxidation at Low Temperature and Mechanistic Study

2021 ◽  
Author(s):  
Xiaoxiao Qin ◽  
Xueyan Chen ◽  
Min Chen ◽  
Jiangho Zhang ◽  
Hong He ◽  
...  
Keyword(s):  
Low Temperature ◽  
Indoor Air ◽  
Air Purification ◽  
Mechanistic Study ◽  
Highly Efficient ◽  
Formaldehyde Oxidation ◽  
Indoor Air Purification

Formaldehyde (HCHO) elimination at low temperature is of great interest for indoor air purification. In this work, 1 wt. % Ru supported on CeO2 and Al2O3 catalysts were prepared by...

CO2 hydrogenation into CH4 over Ni–Fe catalysts

2018 ◽  
Vol 11 (03) ◽  
pp. 1850057 ◽  
Author(s):  
Reza Meshkini Far ◽  
Olena V. Ischenko ◽  
Alla G. Dyachenko ◽  
Oleksandr Bieda ◽  
Snezhana V. Gaidai ◽  
...  
Keyword(s):  
Low Temperature ◽  
Synergistic Effect ◽  
Atmospheric Pressure ◽  
High Efficiency ◽  
Co2 Hydrogenation ◽  
Hydrogenation Catalysts ◽  
Fe Catalysts ◽  
First Time ◽  
Supported Ni ◽  
Hydrogenation Of Co

Here, we report, for the first time, on the catalytic hydrogenation of CO2 to methane at atmospheric pressure. For the preparation of hydrogenation catalysts based on Ni and Fe metals, a convenient method is developed. According to this method, low-temperature reduction of the co-precipitated Ni and Fe oxides with hydrogen gives the effective and selective bimetallic Ni[Formula: see text]Fe[Formula: see text], Ni[Formula: see text]Fe[Formula: see text] and Ni[Formula: see text]Fe[Formula: see text] catalysts. At the temperature range of 300–400[Formula: see text]C, they exhibit a high efficiency of CH4 production with respect to monometallic Ni and Fe catalysts. The results imply a synergistic effect between Ni and Fe which caused the superior activity of the Ni[Formula: see text]Fe[Formula: see text] catalyst conversing [Formula: see text]% of CO2 into CH4 at 350[Formula: see text]C. To adapt the Ni–Fe catalysts in the industry, the effect of two different carriers on the efficiency of the alumina-supported Ni[Formula: see text]Fe[Formula: see text] catalyst was investigated. It is found that the Ni[Formula: see text]Fe[Formula: see text]/[Formula: see text]-Al2O3 catalyst effectively conversed CO2 giving 100% methane yield already at 275[Formula: see text]C.

scholarly journals Petrological implications for the production of methane and hydrogen in hyperalkaline springs from the Othrys ophiolite, Greece.

2013 ◽  
Vol 47 (1) ◽  
pp. 449
Author(s):  
B. Tsikouras ◽  
G. Etiope ◽  
E. Ifandi ◽  
S. Kordella ◽  
G. Papatheodorou ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co2 Hydrogenation ◽  
Ultramafic Rocks ◽  
Mafic Rocks ◽  
Silica Activity ◽  
High Silica ◽  
Greenhouse Gas Budget ◽  
The Origin Of Life ◽  
Life On Earth ◽  
Shed Light

Altered mafic and ultramafic rocks were studied in correspondence with hyperalkaline, CH4-bearing and very low-hydrogen spring waters in the Othrys ophiolite, whose chemical features are typical of present day serpentinisation. The H2 paucity is interpreted as the result of the incorporation of high-silica, aqueous fluids, probably derived from mafic rocks. The vein assemblage of serpentine + magnetite is related to circulation of low-silica fluids whereas serpentine + talc, tremolite after garnet and Fe-rich serpentine in the interior of serpentine veins reflect a late circulation of low-temperature (likely below 120 °C), high silica activity fluids. The highsilica conditions might have limited or interrupted the production of H2, which was subsequently consumed by CO2 hydrogenation to produce CH4. The lack of H2 could also be due to peridotite alteration by CO2-rich fluids. This would imply that the Othrys peridotites, among similar methane-bearing peridotites, may be considered as terrestrial analogues of Martian ultramafic rocks, which are thought to contribute to methane emission in the atmosphere of Mars. Understanding the mechanism of methane abiotic production will likely shed light to the details of some crucial aspects as the greenhouse-gas budget, the production of hydrocarbons and the origin of life on Earth.

Mechanistic Study of Pd–Cu Bimetallic Catalysts for Methanol Synthesis from CO2 Hydrogenation

2017 ◽  
Vol 121 (47) ◽  
pp. 26287-26299 ◽  
Author(s):  
Lingna Liu ◽  
Fei Fan ◽  
Zhao Jiang ◽  
Xiufeng Gao ◽  
Jinjia Wei ◽  
...  
Keyword(s):  
Methanol Synthesis ◽  
Bimetallic Catalysts ◽  
Co2 Hydrogenation ◽  
Mechanistic Study

Mechanistic Study of the Role of Primary Amines in Precursor Conversions to Semiconductor Nanocrystals at Low Temperature

2014 ◽  
Vol 53 (27) ◽  
pp. 6898-6904 ◽  
Author(s):  
Kui Yu ◽  
Xiangyang Liu ◽  
Queena Y. Chen ◽  
Huaqing Yang ◽  
Mingli Yang ◽  
...  
Keyword(s):  
Low Temperature ◽  
Semiconductor Nanocrystals ◽  
Primary Amines ◽  
Mechanistic Study

Mechanistic study of methanol synthesis from CO2 hydrogenation on Rh-doped Cu(111) surfaces

2019 ◽  
Vol 466 ◽  
pp. 26-36 ◽  
Author(s):  
Lingna Liu ◽  
Fei Fan ◽  
Miaomiao Bai ◽  
Fan Xue ◽  
Xiangrong Ma ◽  
...  
Keyword(s):  
Methanol Synthesis ◽  
Co2 Hydrogenation ◽  
Mechanistic Study

Low-temperature CO2 hydrogenation overcoming equilibrium limitations with polyimide hollow fiber membrane reactor

2021 ◽  
Vol 403 ◽  
pp. 126457
Author(s):  
Jongmyeong Lee ◽  
Hae-Gu Park ◽  
Myeong-Hun Hyeon ◽  
Bo-Gyeong Kim ◽  
Seok Ki Kim ◽  
...  
Keyword(s):  
Low Temperature ◽  
Hollow Fiber ◽  
Membrane Reactor ◽  
Hollow Fiber Membrane ◽  
Co2 Hydrogenation ◽  
Fiber Membrane
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