Carbon Nanofibers as Macroscopic Catalyst Support for Fischer-Tropsch Synthesis

2013 ◽  
Vol 1 (3) ◽  
pp. 317-320
Author(s):  
Jomar Livramento Barros Furtado ◽  
André Carvalho ◽  
Ricardo Vieira
Keyword(s):  
Carbon Nanofibers ◽  
Catalyst Support ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis

scholarly journals Fischer–Tropsch Synthesis: Computational Sensitivity Modeling for Series of Cobalt Catalysts

Catalysts ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 857 ◽  
Author(s):  
Harrison Williams ◽  
Muthu K. Gnanamani ◽  
Gary Jacobs ◽  
Wilson D. Shafer ◽  
David Coulliette
Keyword(s):  
Catalyst Support ◽  
Tropsch Synthesis ◽  
Cobalt Catalysts ◽  
Polymerization Process ◽  
Co2 Production ◽  
Continuous Stirred Tank Reactor ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Or Groups ◽  
Significant Difference

Nearly a century ago, Fischer and Tropsch discovered a means of synthesizing organic compounds ranging from C1 to C70 by reacting carbon monoxide and hydrogen on a catalyst. Fischer–Tropsch synthesis (FTS) is now known as a pseudo-polymerization process taking a mixture of CO as H2 (also known as syngas) to produce a vast array of hydrocarbons, along with various small amounts of oxygenated materials. Despite the decades spent studying this process, it is still considered a black-box reaction with a mechanism that is still under debate. This investigation sought to improve our understanding by taking data from a series of experimental Fischer–Tropsch synthesis runs to build a computational model. The experimental runs were completed in an isothermal continuous stirred-tank reactor, allowing for comparison across a series of completed catalyst tests. Similar catalytic recipes were chosen so that conditional comparisons of pressure, temperature, SV, and CO/H2 could be made. Further, results from the output of the reactor that included the deviations in product selectivity, especially that of methane and CO2, were considered. Cobalt was chosen for these exams for its industrial relevance and respectfully clean process as it does not intrinsically undergo the water–gas shift (WGS). The primary focus of this manuscript was to compare runs using cobalt-based catalysts that varied in two oxide catalyst supports. The results were obtained by creating two differential equations, one for H2 and one for CO, in terms of products or groups of products. These were analyzed using sensitivity analysis (SA) to determine the products or groups that impact the model the most. The results revealed a significant difference in sensitivity between the two catalyst–support combinations. When the model equations for H2 and CO were split, the results indicated that the CO equation was significantly more sensitive to CO2 production than the H2 equation.

scholarly journals Hydrophobic catalyst support surfaces by silylation of γ-alumina for Co/Re Fischer-Tropsch synthesis

2018 ◽  
Vol 299 ◽  
pp. 20-27 ◽  
Author(s):  
Erling Rytter ◽  
Ata ul Rauf Salman ◽  
Nikolaos E. Tsakoumis ◽  
Rune Myrstad ◽  
Jia Yang ◽  
...  
Keyword(s):  
Catalyst Support ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Support Surfaces ◽  
Hydrophobic Catalyst

Cobalt and iron supported on carbon nanofibers as catalysts for Fischer–Tropsch synthesis

2014 ◽  
Vol 128 ◽  
pp. 417-424 ◽  
Author(s):  
José Antonio Díaz ◽  
Hasti Akhavan ◽  
Amaya Romero ◽  
Alba María Garcia-Minguillan ◽  
Rubí Romero ◽  
...  
Keyword(s):  
Carbon Nanofibers ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis

scholarly journals Intrinsic Kinetics of Fischer–Tropsch Synthesis over Co/CNTs Catalysts: Effects of Support Interaction

2018 ◽  
Vol 43 (3-4) ◽  
pp. 262-273
Author(s):  
Behnam Hatami ◽  
Ahmad Tavasoli ◽  
Alireza Asghari ◽  
Yahya Zamani ◽  
Akbar Zamaniyan
Keyword(s):  
Carbon Nanotubes ◽  
Hydrogen Adsorption ◽  
Catalyst Support ◽  
Spillover Effect ◽  
Tropsch Synthesis ◽  
Cobalt Catalysts ◽  
High Dispersion ◽  
Impregnation Method ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis

The activities of cobalt catalysts prepared by the microemulsion impregnation method on carbon nanotubes (CNTs) and functionalised carbon nanotubes (FCNTs) supports were evaluated in the Fischer–Tropsch synthesis (FTS). The catalysts were characterised by transmission electron microscopy, X-ray diffraction and Brunauer–Emmett–Teller surface area methods. The results show that the cobalt particles in the FCNTs support are mostly located inside the tubes of the CNTs and show a narrower particle size distribution. The experimental results show that the cobalt catalyst supported on FCNTs leads to a higher CO conversion and FTS activity compared to that supported on normal CNTs. Calculated kinetic results show that the activation energies fall within the narrow range of 101.1–107.1 kJ mol−1 and the heat of hydrogen adsorption was calculated to be −40.2 and −26.2 kJ mol−1 for Co/CNTs and Co/FCNTs catalysts respectively. FCNTs, as a catalyst support of Co nanoparticles, maintain high dispersion which can be attributed to a hydrogen spillover effect of functional groups on the CNT surface.

β-silicon carbide as a catalyst support in the Fischer–Tropsch synthesis: Influence of the modification of the support by a pore agent and acidic treatment

2014 ◽  
Vol 475 ◽  
pp. 82-89 ◽  
Author(s):  
José Antonio Díaz ◽  
María Calvo-Serrano ◽  
Ana Raquel de la Osa ◽  
Alba María García-Minguillán ◽  
Amaya Romero ◽  
...  
Keyword(s):  
Silicon Carbide ◽  
Catalyst Support ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis

Lignin-Derived Graphene-Like Carbon Nanosheets as an Efficient Catalyst Support for Fischer-Tropsch Synthesis

2020 ◽  
Vol 20 (10) ◽  
pp. 6512-6517
Author(s):  
Kaijin Sun ◽  
Yue Zhou ◽  
Xueer Xu ◽  
Yan Li ◽  
Yaxin Hu ◽  
...  
Keyword(s):  
Catalyst Support ◽  
Chemical Characterization ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Efficient Catalyst ◽  
Fischer Tropsch Synthesis ◽  
Carbon Nanosheets ◽  
One Step ◽  
Hierarchical Pore ◽  
Physical And Chemical

Bio-renewable lignin has been used as a precursor for the preparation of various carbon materials, such as carbon fibers, ordered mesoporous carbon and graphite carbon cages. Nevertheless, up to now, there are few studies about prepare graphene-like carbon nanosheets derived from lignin. In this study, we synthesized graphene-like carbon nanosheets, using lignin as the precursor, via one-step pyrolysis route. Fortunately, physical and chemical characterization results indicate that it has high pore volume and hierarchical pore with wrinkled sheet graphene structure. Furthermore, the capability of graphene-like carbon nanosheets was investigated as a catalyst support in Fischer-Tropsch synthesis. The results of catalytic evaluation show that Fe2O3/GCNs has excellent catalytic activity and the selectivity of lower olefins, compared with Fe2O3/AC.

Investigating the feasibility of valorizing residual char from biomass gasification as catalyst support in Fischer-Tropsch synthesis

2020 ◽  
Vol 147 ◽  
pp. 884-894 ◽  
Author(s):  
Vittoria Benedetti ◽  
Snehesh Shivananda Ail ◽  
Francesco Patuzzi ◽  
Davide Cristofori ◽  
Reinhard Rauch ◽  
...  
Keyword(s):  
Catalyst Support ◽  
Biomass Gasification ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis
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