13C MAS NMR Mechanistic Study of the Initial Stages of Propane Activation over Zn/H-MFI Catalyst

2005 ◽  
pp. 333-338
Author(s):  
Yu.G. Kolyagin ◽  
J. Quartararo ◽  
E.G. Derouane ◽  
F. Fajula ◽  
I.I. Ivanova
Keyword(s):  
Mas Nmr ◽  
Mechanistic Study ◽  
13C Mas Nmr ◽  
Propane Activation

13C MAS NMR mechanistic study of n-hexane conversion over Pt supported on ceria and alumina

1999 ◽  
Vol 158 (1-2) ◽  
pp. 3-11 ◽  
Author(s):  
I.I Ivanova ◽  
I.A Chernova-Kharaeva ◽  
L Filotti ◽  
F Bozon-Verduraz ◽  
G.A Shafeev ◽  
...  
Keyword(s):  
Mas Nmr ◽  
Mechanistic Study ◽  
13C Mas Nmr

The analyses of electrolyte and solvent of EDLC by 13C-MAS-NMR after higher temperature charge/discharge load

2013 ◽  
Vol 94 ◽  
pp. 30-33 ◽  
Author(s):  
Satoshi Mitani ◽  
Chihiro Murakami ◽  
Yozo Korai ◽  
Yoshihiro Minato ◽  
Shuichi Ishimoto ◽  
...  
Keyword(s):  
Mas Nmr ◽  
13C Mas Nmr ◽  
Higher Temperature ◽  
Charge Discharge

1H, 13C MAS NMR and GIAO-CPHF calculations of chloramphenicol, thiamphenicol and their pyrrole analogues

2003 ◽  
Vol 646 (1-3) ◽  
pp. 141-149 ◽  
Author(s):  
Teresa Żołek ◽  
Katarzyna Paradowska ◽  
Dorota Krajewska ◽  
Andrzej Różański ◽  
Iwona Wawer
Keyword(s):  
Mas Nmr ◽  
13C Mas Nmr

Cumene transformations over mordenite catalysts: a 13C MAS NMR study

2003 ◽  
Vol 57 (3) ◽  
pp. 297-308 ◽  
Author(s):  
I Irina Ivanova ◽  
Valérie Montouillout ◽  
Christian Fernandez ◽  
Olivier Marie ◽  
Jean-Pierre Gilson
Keyword(s):  
Mas Nmr ◽  
13C Mas Nmr ◽  
Nmr Study

3D 13C MAS NMR Experiment Correlating Order and Dynamics

1990 ◽  
pp. 327-328
Author(s):  
Y. Yang ◽  
A. Hagemeyer ◽  
K. Zemke ◽  
H. W. Spiess
Keyword(s):  
Mas Nmr ◽  
13C Mas Nmr

scholarly journals Probing Pore Size and Connectivity in Porous Silicas Using 13C MAS NMR Spectroscopy of Supercritical Methane

2020 ◽  
Vol 124 (21) ◽  
pp. 11536-11543
Author(s):  
Geoffrey M. Bowers ◽  
Eric D. Walter ◽  
Sarah D. Burton ◽  
Kaitlynn C. Schwarz ◽  
David W. Hoyt ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Pore Size ◽  
Mas Nmr ◽  
13C Mas Nmr

A MAS NMR and DRIFT study of the Ga species in Ga/H-ZSM5 catalysts and their effect on propane ammoxidation

2005 ◽  
Vol 83 (6-7) ◽  
pp. 574-580 ◽  
Author(s):  
Prem Pal ◽  
Juliette Quartararo ◽  
Sharifah B Abd Hamid ◽  
Eric G Derouane ◽  
Jacques C Védrine ◽  
...  
Keyword(s):  
Main Product ◽  
External Surface ◽  
Catalytic Performance ◽  
Mas Nmr ◽  
Propane Ammoxidation ◽  
Bifunctional Mechanism ◽  
Propane Activation ◽  
Cationic Exchange ◽  
Zeolite Crystals

71Ga, 27Al, and 29Si MAS NMR and DRIFT spectroscopies were used to characterize the state of gallium in Ga/H-ZSM5 catalysts tested for their ability to catalyse the ammoxidation of propane. Ga species were observed in two different possible environments: octahedrally coordinated gallium in small Ga2O3 particles at the external surface of the zeolite crystals, octahedrally coordinated gallium in GaO(OH) or related species, and tetrahedrally coordinated gallium in cationic-exchange positions inside the zeolite. Redox (H2–O2) cycles promote the migration of gallium from the GaO(OH) or Ga2O3 species at the external surface of the zeolite crystals to cationic-exchange sites within the zeolite channels. The redox treatment definitely had a beneficial effect on its catalytic performance for the ammoxidation of propane, which is known to occur via a bifunctional mechanism. The main product was acetonitrile at high Ga and Al contents while acrylonitrile was also observed as a side product at high Ga and low Al contents.Key words: ZSM5, MFI, in situ studies, MAS NMR, DRIFT, propane activation, ammoxidation.

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