Quantitative Analysis of HAADF-STEM Images of MoVTeTaO M1 Phase Catalyst for Propane Ammoxidation to Acrylonitrile

ChemCatChem ◽  
2015 ◽  
Vol 7 (22) ◽  
pp. 3731-3737 ◽  
Author(s):  
Jungwon Woo ◽  
Albina Borisevich ◽  
Christoph Koch ◽  
Vadim V. Guliants
Keyword(s):  
Quantitative Analysis ◽  
M1 Phase ◽  
Propane Ammoxidation

Propane Ammoxidation Over the Mo–V–Te–Nb–O M1 Phase: Reactivity of Surface Cations in Hydrogen Abstraction Steps

2011 ◽  
Vol 54 (10-12) ◽  
pp. 605-613 ◽  
Author(s):  
Kaliappan Muthukumar ◽  
Junjun Yu ◽  
Ye Xu ◽  
Vadim V. Guliants
Keyword(s):  
Hydrogen Abstraction ◽  
M1 Phase ◽  
Propane Ammoxidation

Ruthenium and gold-doped M1 phase MoVNbTeO catalysts for propane ammoxidation to acrylonitrile

2010 ◽  
Vol 12 (1) ◽  
pp. 58-63 ◽  
Author(s):  
Prakash Biswas ◽  
Jungwon Woo ◽  
Vadim V. Guliants
Keyword(s):  
M1 Phase ◽  
Propane Ammoxidation

scholarly journals Reaction Networks in Propane Ammoxidation to Acrylonitrile Over Orthorhombic Mo-V-Nb-Te-O Catalyst

2018 ◽  
Author(s):  
Salil Bhatt ◽  
Soon-Jai Khang ◽  
Vadim Guliants
Keyword(s):  
Reaction Kinetics ◽  
Reaction Network ◽  
Impurity Phase ◽  
Reaction Networks ◽  
Propane Conversion ◽  
Residence Times ◽  
M1 Phase ◽  
Propane Ammoxidation ◽  
Catalytic Behavior ◽  
Propylene Ammoxidation

We investigated propane ammoxidation to acrylonitrile over hydrothermal Mo-V-Nb-TeO catalyst containing the dominant M1 phase, recently proposed as active and selective in this selective ammoxidation reaction. The reaction kinetics was studied in a tubular quartz reactor at 600-700K operated in both differential and integral regimes at 5-60% propane conversion. The results obtained in this study were examined on the basis of two reaction networks involving propane transformation via (1) parallel routes to propylene, acrylonitrile and carbon oxides and (2) propylene as the reaction intermediate for acrylonitrile. The results obtained indicated only a slight preference for the reaction network involving the propylene intermediate, which may be explained on the basis of catalytic behavior of the M1 and M2 phases present in the hydrothermal Mo-V-Nb-Te-O catalyst. The dominant M1 phase was capable of catalyzing all of the above transformation steps, whereas the M2 impurity phase was only active in propylene ammoxidation to acrylonitrile. The contribution of the M2 phase to propylene ammoxidation is expected to be less significant at industrially relevant high propane conversions because of the improved ability of the M1 phase to covert propylene into acrylonitrile at longer residence times.

13C Isotope Labeling Study of Propane Ammoxidation over M1 Phase Mo−V−Te−Nb−O Mixed Oxide Catalyst

2007 ◽  
Vol 111 (49) ◽  
pp. 18001-18003 ◽  
Author(s):  
N. Raveendran Shiju ◽  
Ramesh R. Kale ◽  
Suri S. Iyer ◽  
Vadim V. Guliants
Keyword(s):  
Mixed Oxide ◽  
Oxide Catalyst ◽  
Isotope Labeling ◽  
M1 Phase ◽  
Propane Ammoxidation ◽  
13C Isotope ◽  
Mixed Oxide Catalyst

Reaction Networks in Propane Ammoxidation to Acrylonitrile Over Orthorhombic Mo-V-Nb-Te-O Catalyst

2018 ◽  
Author(s):  
Salil Bhatt ◽  
Soon-Jai Khang ◽  
Vadim Guliants
Keyword(s):  
Reaction Kinetics ◽  
Reaction Network ◽  
Impurity Phase ◽  
Reaction Networks ◽  
Propane Conversion ◽  
Residence Times ◽  
M1 Phase ◽  
Propane Ammoxidation ◽  
Catalytic Behavior ◽  
Propylene Ammoxidation

We investigated propane ammoxidation to acrylonitrile over hydrothermal Mo-V-Nb-TeO catalyst containing the dominant M1 phase, recently proposed as active and selective in this selective ammoxidation reaction. The reaction kinetics was studied in a tubular quartz reactor at 600-700K operated in both differential and integral regimes at 5-60% propane conversion. The results obtained in this study were examined on the basis of two reaction networks involving propane transformation via (1) parallel routes to propylene, acrylonitrile and carbon oxides and (2) propylene as the reaction intermediate for acrylonitrile. The results obtained indicated only a slight preference for the reaction network involving the propylene intermediate, which may be explained on the basis of catalytic behavior of the M1 and M2 phases present in the hydrothermal Mo-V-Nb-Te-O catalyst. The dominant M1 phase was capable of catalyzing all of the above transformation steps, whereas the M2 impurity phase was only active in propylene ammoxidation to acrylonitrile. The contribution of the M2 phase to propylene ammoxidation is expected to be less significant at industrially relevant high propane conversions because of the improved ability of the M1 phase to covert propylene into acrylonitrile at longer residence times.

Sign in / Sign up

Export Citation Format

Share Document