scholarly journals Novel cobalt zinc oxide Fischer–Tropsch catalysts synthesised using supercritical anti-solvent precipitation

2014 ◽  
Vol 4 (7) ◽  
pp. 1970-1978 ◽  
Author(s):  
Raimon P. Marin ◽  
Simon A. Kondrat ◽  
Thomas E. Davies ◽  
David J. Morgan ◽  
Dan I. Enache ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Co Hydrogenation ◽  
Oxide Catalysts ◽  
Fischer Tropsch

Cobalt zinc oxide catalysts have been prepared by anti-solvent precipitation in supercritical CO2 and investigated for CO hydrogenation.

scholarly journals Activation of Cobalt Foil Catalysts for CO Hydrogenation

Catalysts ◽  
2022 ◽  
Vol 12 (1) ◽  
pp. 65
Author(s):  
Erling Rytter ◽  
Christian Aaserud ◽  
Anne-Mette Hilmen ◽  
Edvard Bergene ◽  
Anders Holmen
Keyword(s):  
Produced Water ◽  
Co Hydrogenation ◽  
Fischer Tropsch ◽  
Olefin Hydrogenation ◽  
Reduction Time ◽  
Site Density ◽  
Ft Synthesis ◽  
Structure Sensitive ◽  
Turn Over Frequency ◽  
Turn Over

CO hydrogenation has been studied on cobalt foils as model catalysts for Fischer–Tropsch (FT) synthesis. The effect of pretreatment (number of calcinations and different reduction times) for cobalt foil catalysts at 220 °C, 1 bar, and H2/CO = 3 has been studied in a microreactor. The foils were examined by scanning electron microscopy (SEM). It was found that the catalytic activity of the cobalt foil increases with the number of pretreatments. The mechanism is likely an increase in the available cobalt surface area from progressively deeper oxidation of the foil, supported by surface roughness detected by SEM. The highest FT activity was obtained using a reduction time of only 5 min (compared to 1 and 30 min). Prolonged reduction caused the sintering of cobalt crystallites, while too short of a reduction time led to incomplete reduction and small crystallites susceptible to low turn-over frequency from structure sensitivity. Larger crystals from longer reduction times gave increased selectivity to heavier components. The paraffin/olefin ratio increased with the increasing number of pretreatments due to olefin hydrogenation favored by enhanced cobalt site density. From the results, it is suggested that olefin hydrogenation is not structure sensitive, and that mass transfer limitations may occur depending on the pretreatment procedure. Produced water did not influence the results for the low conversions experienced in the present study (<6%).

Kinetics of Methanol Synthesis from Carbon Dioxide Hydrogenation over Copper–Zinc Oxide Catalysts

2017 ◽  
Vol 56 (45) ◽  
pp. 13133-13145 ◽  
Author(s):  
Jean-François Portha ◽  
Ksenia Parkhomenko ◽  
Kilian Kobl ◽  
Anne-Cécile Roger ◽  
Sofiane Arab ◽  
...  
Keyword(s):  
Carbon Dioxide ◽  
Zinc Oxide ◽  
Methanol Synthesis ◽  
Oxide Catalysts ◽  
Carbon Dioxide Hydrogenation ◽  
Copper Zinc ◽  
Copper Zinc Oxide ◽  
Kinetics Of

Fischer−Tropsch Kinetic Studies with Cobalt−Manganese Oxide Catalysts

2000 ◽  
Vol 39 (1) ◽  
pp. 48-54 ◽  
Author(s):  
Martin J. Keyser ◽  
Raymond C. Everson ◽  
Rafael L. Espinoza
Keyword(s):  
Manganese Oxide ◽  
Kinetic Studies ◽  
Oxide Catalysts ◽  
Fischer Tropsch ◽  
Manganese Oxide Catalysts

CO Hydrogenation on Pd(111): Competition between Fischer–Tropsch and Oxygenate Synthesis Pathways

2013 ◽  
Vol 117 (28) ◽  
pp. 14667-14676 ◽  
Author(s):  
Sen Lin ◽  
Jianyi Ma ◽  
Xinxin Ye ◽  
Daiqian Xie ◽  
Hua Guo
Keyword(s):  
Co Hydrogenation ◽  
Fischer Tropsch ◽  
Oxygenate Synthesis

scholarly journals Acid Properties of Zinc Oxide Catalysts Prepared by Several Methods.

1993 ◽  
pp. 1029-1033 ◽  
Author(s):  
Tsuyoshi NAKAJIMA ◽  
Shoji NAKAGAMA ◽  
Shozi MISHIMA ◽  
Isao MATSUZAKI
Keyword(s):  
Zinc Oxide ◽  
Oxide Catalysts ◽  
Acid Properties

ChemInform Abstract: Acid Properties of Zinc Oxide Catalysts Prepared by Several Methods.

ChemInform ◽  
2010 ◽  
Vol 25 (12) ◽  
pp. no-no
Author(s):  
T. NAKAJIMA ◽  
S. NAKAGAMA ◽  
S. MISHIMA ◽  
I. MATSUZAKI
Keyword(s):  
Zinc Oxide ◽  
Oxide Catalysts ◽  
Acid Properties
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