The effect of copper on the redox behaviour of iron oxide for chemical-looping hydrogen production probed by in situ X-ray absorption spectroscopy

2018 ◽  
Vol 20 (18) ◽  
pp. 12736-12745 ◽  
Author(s):  
Nur Sena Yüzbasi ◽  
Paula M. Abdala ◽  
Qasim Imtiaz ◽  
Sung Min Kim ◽  
Agnieszka M. Kierzkowska ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Hydrogen Production ◽  
Reduction Rate ◽  
Production Cycle ◽  
Chemical Looping ◽  
Oxygen Carriers ◽  
X Ray ◽  
Effect Of Copper ◽  
X Ray Absorption

We report the influence of copper on the reduction rate and pathways of iron oxide based oxygen carriers for a chemical looping based H2 production cycle.

The Effect of Water on the Stability of Iron Oxide and Iron Carbide Nanoparticles in Hydrogen and Syngas Followed by in Situ X-ray Absorption Spectroscopy

2012 ◽  
Vol 116 (13) ◽  
pp. 7367-7373 ◽  
Author(s):  
Peter Thüne ◽  
Prabashini Moodley ◽  
Freek Scheijen ◽  
Hans Fredriksson ◽  
Remco Lancee ◽  
...  
Keyword(s):  
Iron Oxide ◽  
Absorption Spectroscopy ◽  
Iron Carbide ◽  
X Ray ◽  
Effect Of Water ◽  
The Stability ◽  
X Ray Absorption

In Situ X‐Ray Absorption Near‐Edge Spectroscopic Study of the Cathodic Reduction of Artificial Iron Oxide Passive Films

1996 ◽  
Vol 143 (2) ◽  
pp. 574-582 ◽  
Author(s):  
Patrik Schmuki ◽  
Sannakaisa Virtanen ◽  
Alison J. Davenport ◽  
Carissima M. Vitus
Keyword(s):  
Iron Oxide ◽  
Spectroscopic Study ◽  
Cathodic Reduction ◽  
Passive Films ◽  
X Ray ◽  
X Ray Absorption

Mechanistic studies of chemical looping desulfurization of Mn-based oxides using in situ X-ray absorption spectroscopy

2014 ◽  
Vol 113 ◽  
pp. 1895-1901 ◽  
Author(s):  
C.F.J. König ◽  
M. Nachtegaal ◽  
M. Seemann ◽  
F. Clemens ◽  
N. van Garderen ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Chemical Looping ◽  
Mechanistic Studies ◽  
X Ray ◽  
X Ray Absorption

Dissolution of Thin Iron Oxide Films Used as Models for Iron Passive Films Studied by In Situ X‐Ray Absorption Near‐Edge Spectroscopy

1997 ◽  
Vol 144 (1) ◽  
pp. 198-204 ◽  
Author(s):  
Sannakaisa Virtanen ◽  
Patrik Schmuki ◽  
Alison J. Davenport ◽  
Carissima M. Vitus
Keyword(s):  
Iron Oxide ◽  
Oxide Films ◽  
Passive Films ◽  
X Ray ◽  
Iron Oxide Films ◽  
X Ray Absorption

In Situ X-Ray Absorption Studies of the Electrochemical Reduction of Hydroxocobalamin

1997 ◽  
Vol 7 (C2) ◽  
pp. C2-619-C2-620 ◽  
Author(s):  
M. Giorgett ◽  
I. Ascone ◽  
M. Berrettoni ◽  
S. Zamponi ◽  
R. Marassi
Keyword(s):  
Electrochemical Reduction ◽  
X Ray ◽  
Absorption Studies ◽  
X Ray Absorption

Application of In Situ X-ray Absorption Spectroscopy to Study Dilute Chromium Ions in a Molten Chloride Salt

2019 ◽  
Author(s):  
Jisue Moon ◽  
Carter Abney ◽  
Dmitriy Dolzhnikov ◽  
James M. Kurley ◽  
Kevin A. Beyer ◽  
...  
Keyword(s):  
Absorption Spectroscopy ◽  
Local Structure ◽  
Chloride Salt ◽  
X Ray ◽  
Molten Chloride ◽  
Stable Species ◽  
Higher Temperature ◽  
Cr Concentration ◽  
X Ray Absorption

The local structure of dilute CrCl<sub>3</sub> in a molten MgCl<sub>2</sub>:KCl salt was investigated by <i>in situ</i> x-ray absorption spectroscopy (XAS) at temperatures from room temperature to 800<sup>o</sup>C. This constitutes the first experiment where dilute Cr speciation is explored in a molten chloride salt, ostensibly due to the compounding challenges arising from a low Cr concentration in a matrix of heavy absorbers at extreme temperatures. CrCl<sub>3</sub> was confirmed to be the stable species between 200 and 500<sup>o</sup>C, while mobility of metal ions at higher temperature (>700<sup>o</sup>C) prevented confirmation of the local structure.

Kinetic analysis of Ag particle redispersion into ZSM-5 in the presence of coke using in situ XAFS

2021 ◽  
Author(s):  
Kazumasa Murata ◽  
Junya Ohyama ◽  
Atsushi Satsuma
Keyword(s):  
Fine Structure ◽  
Kinetic Analysis ◽  
X Ray ◽  
Xafs Spectroscopy ◽  
Absorption Fine ◽  
Ag Particles ◽  
In Situ Xafs ◽  
Ag Particle ◽  
X Ray Absorption

In the present study, the redispersion behavior of Ag particles on ZSM-5 in the presence of coke was observed using in situ X-ray absorption fine structure (XAFS) spectroscopy.

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