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

Highly active carbon nanotube–promoted Rh-Mn-Li/SiO2 catalysts for the synthesis of C2+ oxygenates from syngas

2021 ◽  
pp. 174751982098472
Author(s):  
Jun Yu ◽  
Ying Han ◽  
Guoqing Chen ◽  
Xiuzhen Xiao ◽  
Haifang Mao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Photoelectron Spectroscopy ◽  
Co Hydrogenation ◽  
X Ray ◽  
Highly Active ◽  
Transmission Electron ◽  
Co Insertion ◽  
Temperature Programmed Surface Reaction ◽  
Temperature Programmed ◽  
Oxygenate Synthesis

The effect of carbon nanotubes on the catalytic properties of Rh-Mn-Li/SiO2 catalysts was investigated for CO hydrogenation. The catalysts were comprehensively characterized by means of X-ray power diffraction, N2 sorption, transmission electron microscope, H2–temperature-programmed reduction, CO–temperature-programmed desorption, temperature-programmed surface reaction, and X-ray photoelectron spectroscopy. The results showed that an appropriate amount of carbon nanotubes can be attached to the surface of the SiO2 sphere and can improve the Rh dispersion. Moderate Rh-Mn interaction can be obtained by doping with the appropriate amount of carbon nanotubes, which promotes the formation of strongly adsorbed CO and facilitates the progress of CO insertion, resulting in the increase in the selectivity of C2+ oxygenate synthesis.

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%).

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 Influence of the addition of Pd and Cu to cobalt catalysts prepared by SMAI for F-T synthesis

2007 ◽  
Vol 5 (1) ◽  
pp. 144-155 ◽  
Author(s):  
Li-hua Yu ◽  
Shou-min Zhang ◽  
Xianzhi Guo ◽  
Da Wang ◽  
Shu-rong Wang ◽  
...  
Keyword(s):  
Metal Atom ◽  
Co Hydrogenation ◽  
Magnetic Measurements ◽  
Weight Ratio ◽  
Cobalt Catalysts ◽  
Metallic State ◽  
Fischer Tropsch ◽  
Superparamagnetic Behavior ◽  
Highly Dispersed ◽  
Ft Ir

AbstractThe Co-Pd/SiO2 and Co-Cu/SiO2 catalysts were prepared via solvated metal atom impregnation (SMAI) method and investigated for the Fischer-Tropsch (F-T) synthesis. The catalysts contained 5wt.% Co and a weight ratio of Pd (or Cu) to Co of 1/30. XPS indicated that Co, Pd and Cu were in metallic state. The results of XPS and magnetic measurements showed that Co and Pd (Cu) were alloyed. The Co particles on the catalysts were very highly dispersed and they displayed superparamagnetic behavior. FT-IR indicated that the electrons shifted from Cu and Pd to Co. Catalytic tests showed that CO hydrogenation rates followed the order Pd-Co &gt; Cu-Co &gt; Co.

Fischer-Tropsch CO-Hydrogenation on SiO2-supported Osmium Complexes

2008 ◽  
Vol 63 (3) ◽  
pp. 289-292 ◽  
Author(s):  
Ntombovuyo Bungane ◽  
Cathrin Welker ◽  
Eric van Steen ◽  
Michael Claeys
Keyword(s):  
Carbon Monoxide ◽  
Co Hydrogenation ◽  
Bond Formation ◽  
Organometallic Complexes ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
High Olefin ◽  
Osmium Complexes ◽  
Very High

The conversion of carbon monoxide with hydrogen was studied on a standard Os on SiO2 catalyst at different reaction temperatures, in the range between 200 and 300 °C. Additionally, supported di- and triatomic organometallic Os complexes were tested for their activity in the Fischer-Tropsch synthesis at 220 °C. All compounds showed formation of hydrocarbons, indicating that the organoosmium complexes are indeed active for C─C bond formation. Osmium as Fischer-Tropsch catalyst, however, is approximately 100 times less active compared to ruthenium. Very high methane selectivities (> 90 C-%) were obtained as well as high olefin to paraffin ratios, in particular with the organometallic complexes tested.

Two-dimensional-related catalytic materials for solar-driven conversion of COx into valuable chemical feedstocks

2019 ◽  
Vol 48 (7) ◽  
pp. 1972-2010 ◽  
Author(s):  
Yufei Zhao ◽  
Geoffrey I. N. Waterhouse ◽  
Guangbo Chen ◽  
Xuyang Xiong ◽  
Li-Zhu Wu ◽  
...  
Keyword(s):  
Co Hydrogenation ◽  
2D Materials ◽  
Water Gas Shift ◽  
Two Dimensional ◽  
Water Gas Shift Reaction ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Catalytic Materials ◽  
Shift Reaction ◽  
Water Gas

This review summarizes recent development relating to 2D materials and their derivatives for solar-driven CO2 reduction by H2O or H2, as well as CO hydrogenation (via the water gas shift reaction or Fischer–Tropsch synthesis) to produce valuable products (especially hydrocarbons, alcohols and aromatics).

Effects of CO2 on the deactivation behaviors of Co/Al2O3 and Co/SiO2 in CO hydrogenation to hydrocarbons

2017 ◽  
Vol 7 (18) ◽  
pp. 4079-4091 ◽  
Author(s):  
Kyung Soo Park ◽  
K. Saravanan ◽  
Seon-Ju Park ◽  
Yun-Jo Lee ◽  
Ki-Won Jeon ◽  
...  
Keyword(s):  
Co Hydrogenation ◽  
Surface Oxidation ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis

Different deactivation behaviors of the prototype Co/γ-Al2O3 (CoAl) and Co/SiO2 (CoSi) catalysts under an excess CO2 environment were investigated in terms of the surface oxidation and aggregation of cobalt crystallites for the Fischer–Tropsch Synthesis (FTS) reaction.

scholarly journals Catalytic Activity of Thermolyzed [Co(NH3)6][Fe(CN)6] in CO Hydrogenation Reaction

Molecules ◽  
2021 ◽  
Vol 26 (13) ◽  
pp. 3782
Author(s):  
Alevtina N. Gosteva ◽  
Mayya V. Kulikova ◽  
Yulya P. Semushina ◽  
Mariya V. Chudakova ◽  
Nikita S. Tsvetov ◽  
...  
Keyword(s):  
Thermal Destruction ◽  
Co Hydrogenation ◽  
Hydrogenation Reaction ◽  
Tropsch Synthesis ◽  
Reaction Products ◽  
X Ray Diffraction ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Catalyst Composition ◽  
Synthetic Liquid Hydrocarbons

Currently, the processes of obtaining synthetic liquid hydrocarbons and oxygenates are very relevant. Fischer-Tropsch synthesis (FTS) is the most important step in these processes. The products of thermal destruction in argon of the mixture [Co(NH3)6][Fe(CN)6] and Al(OH)3 were used as catalysts for CO hydrogenation. The resulting compositions were studied using powder X-ray diffraction, IR spectroscopy, elemental analysis, SEM micrographs. The specific surface area, pore and particle size distributions were determined. It was determined that the DCS-based catalysts were active in the high-temperature Fischer-Tropsch synthesis. The effect of aluminum in the catalyst composition on the distribution of reaction products was revealed.

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