scholarly journals The origin of Mo promotion during H2 pretreatment on an Fe catalyst for Fischer–Tropsch synthesis

RSC Advances ◽  
2017 ◽  
Vol 7 (70) ◽  
pp. 44474-44481 ◽  
Author(s):  
Liping Li ◽  
Caixia Hu ◽  
Wen Liu ◽  
Peng Fei ◽  
Xiaojing Cui ◽  
...  
Keyword(s):  
Tropsch Synthesis ◽  
Intrinsic Activity ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Fe Catalyst ◽  
H2 Pretreatment ◽  
Fe Catalysts ◽  
Fe Sites

The Mo promotion on Fischer–Tropsch Fe catalysts is related to Mo dispersion on Fe surface during H2 pretreatment. The resulting strong Fe–Mo interaction disfavors the activation of CO molecules on active Fe sites and consequently reduced the intrinsic activity.

scholarly journals Effects of Structure and Particle Size of Iron, Cobalt and Ruthenium Catalysts on Fischer–Tropsch Synthesis

Reactions ◽  
2021 ◽  
Vol 2 (1) ◽  
pp. 62-77
Author(s):  
Wenping Ma ◽  
Ajay K. Dalai
Keyword(s):  
Particle Size ◽  
Ruthenium Catalysts ◽  
Tropsch Synthesis ◽  
Intrinsic Activity ◽  
Fischer Tropsch ◽  
Iron Cobalt ◽  
Ru Catalysts ◽  
Fischer Tropsch Synthesis ◽  
Fe Catalyst ◽  
Size Threshold

This review emphasizes the importance of the catalytic conversion techniques in the production of clean liquid and hydrogen fuels (XTF) and chemicals (XTC) from the carbonaceous materials including coal, natural gas, biomass, organic wastes, biogas and CO2. Dependence of the performance of Fischer–Tropsch Synthesis (FTS), a key reaction of the XTF/XTC process, on catalyst structure (crystal and size) is comparatively examined and reviewed. The contribution illustrates the very complicated crystal structure effect, which indicates that not only the particle type, but also the particle shape, facets and orientation that have been evidenced recently, strongly influence the catalyst performance. In addition, the particle size effects over iron, cobalt and ruthenium catalysts were carefully compared and analyzed. For all Fe, Co and Ru catalysts, the metal turnover frequency (TOF) for CO hydrogenation increased with increasing metal particle size in the small size region i.e., less than the size threshold 7–8 nm, but was found to be independent of particle size for the catalysts with large particle sizes greater than the size threshold. There are some inconsistencies in the small particle size region for Fe and Ru catalysts, i.e., an opposite activity trend and an abnormal peak TOF value were observed on a Fe catalyst and a Ru catalyst (2 nm), respectively. Further study from the literature provides deeper insights into the catalyst behaviors. The intrinsic activity of Fe catalysts (10 nm) at 260–300 °C is estimated in the range of 0.046–0.20 s−1, while that of the Co and Ru catalysts (7–70 nm) at 220 °C are 0.1 s−1 and 0.4 s−1, respectively.

Fischer–Tropsch synthesis on mono- and bimetallic Co and Fe catalysts supported on carbon nanotubes

2009 ◽  
Vol 90 (12) ◽  
pp. 1486-1494 ◽  
Author(s):  
Ahmad Tavasoli ◽  
Mariane Trépanier ◽  
Reza M. Malek Abbaslou ◽  
Ajay K. Dalai ◽  
Nicolas Abatzoglou
Keyword(s):  
Carbon Nanotubes ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Fe Catalysts

Fischer–Tropsch Synthesis: Effect of Potassium on Activity and Selectivity for Oxide and Carbide Fe Catalysts

2013 ◽  
Vol 143 (11) ◽  
pp. 1123-1131 ◽  
Author(s):  
Muthu Kumaran Gnanamani ◽  
Hussein H. Hamdeh ◽  
Wilson D. Shafer ◽  
Dennis E. Sparks ◽  
Burtron H. Davis
Keyword(s):  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Fe Catalysts

Fischer–Tropsch synthesis: Effect of CO2 containing syngas over Pt promoted Co/γ-Al2O3 and K-promoted Fe catalysts

2011 ◽  
Vol 12 (11) ◽  
pp. 936-939 ◽  
Author(s):  
Muthu Kumaran Gnanamani ◽  
Wilson D. Shafer ◽  
Dennis E. Sparks ◽  
Burtron H. Davis
Keyword(s):  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Fe Catalysts

Effect of the activation atmosphere on the activity of Fe catalysts supported on SBA-15 in the Fischer–Tropsch Synthesis

2011 ◽  
Vol 278 (2) ◽  
pp. 310-320 ◽  
Author(s):  
Leonardo A. Cano ◽  
María V. Cagnoli ◽  
José F. Bengoa ◽  
Ana M. Alvarez ◽  
Sergio G. Marchetti
Keyword(s):  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Fe Catalysts

Effect of Mo addition on precipitated Fe catalysts for Fischer–Tropsch synthesis

2009 ◽  
Vol 304 (1-2) ◽  
pp. 128-134 ◽  
Author(s):  
Shaodong Qin ◽  
Chenghua Zhang ◽  
Jian Xu ◽  
Baoshao Wu ◽  
Hongwei Xiang ◽  
...  
Keyword(s):  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Fe Catalysts

Carbon nanofibers and nanospheres-supported bimetallic (Co and Fe) catalysts for the Fischer–Tropsch synthesis

2015 ◽  
Vol 138 ◽  
pp. 455-462 ◽  
Author(s):  
José Antonio Díaz ◽  
Amaya Romero ◽  
Alba María García-Minguillán ◽  
Anne Giroir-Fendler ◽  
Jose Luis Valverde
Keyword(s):  
Carbon Nanofibers ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Fe Catalysts

Effect of the support and promoters in Fischer-Tropsch synthesis using supported Fe catalysts

2017 ◽  
Vol 282 ◽  
pp. 204-213 ◽  
Author(s):  
L.A. Cano ◽  
A.A. Garcia Blanco ◽  
G. Lener ◽  
S.G. Marchetti ◽  
K. Sapag
Keyword(s):  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Fe Catalysts ◽  
Effect Of The Support
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