scholarly journals Combined In Situ X-ray Powder Diffractometry/Raman Spectroscopy of Iron Carbide and Carbon Species Evolution in Fe(−Na–S)/α-Al2O3 Catalysts during Fischer–Tropsch Synthesis

ACS Catalysis ◽  
2020 ◽  
Vol 10 (17) ◽  
pp. 9837-9855 ◽  
Author(s):  
Pasi P. Paalanen ◽  
Sophie H. van Vreeswijk ◽  
Bert M. Weckhuysen
Keyword(s):  
Raman Spectroscopy ◽  
Iron Carbide ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
X Ray ◽  
Carbon Species ◽  
Species Evolution ◽  
Α Al2o3

scholarly journals Use of in situ Mossbauer Spectroscopy and X-Ray Diffraction Techniques for the Characterization of Activated Fe-Ce Catalysts Employed in Fischer-Tropsch Synthesis

2008 ◽  
Vol 1 (1) ◽  
pp. 64-70 ◽  
Author(s):  
F. J. Perez-Alonso ◽  
M. Ojeda ◽  
T. Herranz ◽  
J. M. Gonzalez-Carballo ◽  
J. L.G. Fierro ◽  
...  
Keyword(s):  
Mössbauer Spectroscopy ◽  
Mossbauer Spectroscopy ◽  
Tropsch Synthesis ◽  
X Ray Diffraction ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
X Ray ◽  
Mößbauer Spectroscopy

scholarly journals In Situ X-ray Raman Scattering Spectroscopy of the Formation of Cobalt Carbides in a Co/TiO2 Fischer–Tropsch Synthesis Catalyst

ACS Catalysis ◽  
2021 ◽  
pp. 809-819
Author(s):  
José G. Moya-Cancino ◽  
Ari-Pekka Honkanen ◽  
Ad M. J. van der Eerden ◽  
Ramon Oord ◽  
Matteo Monai ◽  
...  
Keyword(s):  
Raman Scattering ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Raman Scattering Spectroscopy ◽  
X Ray

scholarly journals Fischer–Tropsch Synthesis: Effect of the Promoter’s Ionic Charge and Valence Level Energy on Activity

Reactions ◽  
2021 ◽  
Vol 2 (4) ◽  
pp. 408-426
Author(s):  
Mirtha Z. Leguizamón León Ribeiro ◽  
Joice C. Souza ◽  
Muthu Kumaran Gnanamani ◽  
Michela Martinelli ◽  
Gabriel F. Upton ◽  
...  
Keyword(s):  
Tropsch Synthesis ◽  
Orbital Energy ◽  
Level Energy ◽  
Ionic Charge ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
X Ray ◽  
Temperature Programmed ◽  
Similar Ionic Radius

In this contribution, we examine the effect of the promoter´s ionic charge and valence orbital energy on the catalytic activity of Fe-based catalysts, based on in situ synchrotron X-ray powder diffraction (SXRPD), temperature-programmed-based techniques (TPR, TPD, CO-TP carburization), and Fischer–Tropsch synthesis catalytic testing studies. We compared the promoting effects of K (a known promoter for longer-chained products) with Ba, which has a similar ionic radius but has double the ionic charge. Despite being partially “buried” in a crystalline BaCO3 phase, the carburization of the Ba-promoted catalyst was more effective than that of K; this was primarily due to its higher (2+) ionic charge. With Ba2+, higher selectivity to methane and lighter products were obtained compared to the K-promoted catalysts; this is likely due to Ba´s lesser capability of suppressing H adsorption on the catalyst surface. An explanation is provided in terms of a more limited mixing between electron-filled Ba2+ 5p and partially filled Fe 3d orbitals, which are expected to be important for the chemical promotion, as they are further apart in energy compared to the K+ 3p and Fe 3d orbitals.

Elucidation of The Influence of Cu Promoter on Carburization Prior to Iron-Based Fischer-Tropsch Synthesis: an In situ X-Ray Diffraction Study

ChemCatChem ◽  
2018 ◽  
Vol 11 (2) ◽  
pp. 715-723 ◽  
Author(s):  
Xiaodong Sun ◽  
Xingwu Liu ◽  
Jinjia Liu ◽  
Yurong He ◽  
Junqing Yin ◽  
...  
Keyword(s):  
Diffraction Study ◽  
Tropsch Synthesis ◽  
X Ray Diffraction ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
X Ray ◽  
Iron Based

scholarly journals In situ X-Ray Absorption of Co/Mn/TiO2 Catalysts for Fischer—Tropsch Synthesis.

ChemInform ◽  
2004 ◽  
Vol 35 (50) ◽  
Author(s):  
Fernando Morales ◽  
Frank M. F. de Groot ◽  
Pieter Glatzel ◽  
Evgueni Kleimenov ◽  
Hendrik Bluhm ◽  
...  
Keyword(s):  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
X Ray ◽  
X Ray Absorption

scholarly journals In Situ X-ray Absorption of Co/Mn/TiO2Catalysts for Fischer−Tropsch Synthesis

2004 ◽  
Vol 108 (41) ◽  
pp. 16201-16207 ◽  
Author(s):  
Fernando Morales ◽  
Frank M. F. de Groot ◽  
Pieter Glatzel ◽  
Evgueni Kleimenov ◽  
Hendrik Bluhm ◽  
...  
Keyword(s):  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
X Ray ◽  
X Ray Absorption

scholarly journals Identification of Iron Carbides in Fe(−Na−S)/α‐Al 2 O 3 Fischer‐Tropsch Synthesis Catalysts with X‐ray Powder Diffractometry and Mössbauer Absorption Spectroscopy

ChemCatChem ◽  
2020 ◽  
Vol 12 (20) ◽  
pp. 5121-5139 ◽  
Author(s):  
Pasi P. Paalanen ◽  
Sophie H. Vreeswijk ◽  
A. Iulian Dugulan ◽  
Bert M. Weckhuysen
Keyword(s):  
Absorption Spectroscopy ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Iron Carbides ◽  
Fischer Tropsch Synthesis ◽  
X Ray ◽  
Synthesis Catalysts

scholarly journals Back Cover: Selective Formation of Hägg Iron Carbide with g-C3 N4 as a Sacrificial Support for Highly Active Fischer-Tropsch Synthesis (ChemCatChem 21/2015)

ChemCatChem ◽  
2015 ◽  
Vol 7 (21) ◽  
pp. 3594-3594
Author(s):  
Hunmin Park ◽  
Duck Hyun Youn ◽  
Jae Young Kim ◽  
Won Yong Kim ◽  
Yo Han Choi ◽  
...  
Keyword(s):  
Iron Carbide ◽  
Tropsch Synthesis ◽  
Fischer Tropsch ◽  
Fischer Tropsch Synthesis ◽  
Back Cover ◽  
Highly Active ◽  
Selective Formation
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