Genesis of Highly Active Cobalt Sulfide Catalyst for Hydrogenation and Isomerization: Effect of the Calcination Temperature of Precursor Cobalt Oxide upon the Catalytic Properties of Cobalt Sulfide

1992 ◽  
Vol 65 (5) ◽  
pp. 1331-1341 ◽  
Author(s):  
Yasuaki Okamoto ◽  
Kozo Nagata ◽  
Toshinobu Imanaka ◽  
Kazuhiro Inamura ◽  
Toshiyuki Takyu
Keyword(s):  
Cobalt Oxide ◽  
Calcination Temperature ◽  
Catalytic Properties ◽  
Cobalt Sulfide ◽  
Sulfide Catalyst ◽  
Highly Active

scholarly journals The Importance of Thermal Treatment on Wet-Kneaded Silica–Magnesia Catalyst and Lebedev Ethanol-to-Butadiene Process

Nanomaterials ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 579
Author(s):  
Sang-Ho Chung ◽  
Adrian Ramirez ◽  
Tuiana Shoinkhorova ◽  
Ildar Mukhambetov ◽  
Edy Abou-Hamad ◽  
...  
Keyword(s):  
Thermal Treatment ◽  
Calcination Temperature ◽  
Catalytic Properties ◽  
Catalyst Preparation ◽  
Preparation Methods ◽  
Calcination Temperatures ◽  
Alternative Process ◽  
Magnesium Silicates

The Lebedev process, in which ethanol is catalytically converted into 1,3-butadiene, is an alternative process for the production of this commodity chemical. Silica–magnesia (SiO2–MgO) is a benchmark catalyst for the Lebedev process. Among the different preparation methods, the SiO2–MgO catalysts prepared by wet-kneading typically perform best owing to the surface magnesium silicates formed during wet-kneading. Although the thermal treatment is of pivotal importance as a last step in the catalyst preparation, the effect of the calcination temperature of the wet-kneaded SiO2–MgO on the Lebedev process has not been clarified yet. Here, we prepared and characterized in detail a series of wet-kneaded SiO2–MgO catalysts using varying calcination temperatures. We find that the thermal treatment largely influences the type of magnesium silicates, which have different catalytic properties. Our results suggest that the structurally ill-defined amorphous magnesium silicates and lizardite are responsible for the production of ethylene. Further, we argue that forsterite, which has been conventionally considered detrimental for the formation of ethylene, favors the formation of butadiene, especially when combined with stevensite.

Effect of calcination temperature on the morphology and catalytic properties of ZnO nanostructures fabricated from a chiral precursor for photodegradation of both cationic and anionic dyes

2022 ◽  
Author(s):  
Shradha Gandhi ◽  
Rupinder Kaur ◽  
Vandana Sharma ◽  
Sanjay Mandal
Keyword(s):  
Calcination Temperature ◽  
Catalytic Properties ◽  
Zno Nanostructures ◽  
Anionic Dyes ◽  
Different Temperatures

Diverse ZnO nanostructures (ZnO_1 to ZnO_3) were synthesized by direct calcination of a chiral MOF precursor {[Zn4(µ3-OH)2(D-2,4-cbs)2(H2O)4].5H2O}n (Zn-CBS) at three different temperatures 600, 700 and 800 oC, respectively. On the...

So-called ·CoMoS“ phase observed in carbon-supported cobalt sulfide catalyst by mössbauer emission spectroscopy

1988 ◽  
Vol 39 ◽  
pp. L7-L10 ◽  
Author(s):  
A.M. Van Der Kraan ◽  
M.W.J. Crajé ◽  
E. Gerkema ◽  
W.L.T.M. Ramselaar ◽  
V.H.J. De Beer
Keyword(s):  
Emission Spectroscopy ◽  
Cobalt Sulfide ◽  
Sulfide Catalyst

scholarly journals Enhanced photoelectrochemical hydrogen generation in neutral electrolyte using non-vacuum processed CIGS photocathodes with an earth-abundant cobalt sulfide catalyst

2019 ◽  
Vol 55 (17) ◽  
pp. 2465-2468 ◽  
Author(s):  
Mingqing Wang ◽  
Yung-Shan Chang ◽  
Chun-Wen Tsao ◽  
Mei-Jing Fang ◽  
Yung-Jung Hsu ◽  
...  
Keyword(s):  
Hydrogen Generation ◽  
Cobalt Sulfide ◽  
Sulfide Catalyst ◽  
Earth Abundant ◽  
Neutral Electrolyte

A CIGS-based photocathode combined with an earth abundant Co–S catalyst has demonstrated remarkable photoelectrochemical hydrogen generation in neutral electrolyte.

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