scholarly journals Chemical looping oxidative dehydrogenation of propane: A comparative study of Ga-based, Mo-based, V-based oxygen carriers

2020 ◽  
Vol 157 ◽  
pp. 108137
Author(s):  
Tianwei Wu ◽  
Qingbo Yu ◽  
Ivo Roghair ◽  
Kun Wang ◽  
Martin van Sint Annaland
Keyword(s):  
Comparative Study ◽  
Oxidative Dehydrogenation ◽  
Chemical Looping ◽  
Oxygen Carriers ◽  
Oxidative Dehydrogenation Of Propane

scholarly journals Development of V-Based Oxygen Carriers for Chemical Looping Oxidative Dehydrogenation of Propane

Catalysts ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 119
Author(s):  
Tianwei Wu ◽  
Qingbo Yu ◽  
Kun Wang ◽  
Martin van Sint Annaland
Keyword(s):  
Oxidative Dehydrogenation ◽  
Oxygen Transport ◽  
Propane Conversion ◽  
Chemical Looping ◽  
Impregnation Method ◽  
Oxygen Carriers ◽  
Oxidative Dehydrogenation Of Propane ◽  
Transport Capacity ◽  
Mechanical Mixing ◽  
Oxygen Transport Capacity

Two different preparation methods, viz. incipient impregnation and mechanical mixing, have been used to prepare V-based oxygen carriers with different V loadings for chemical looping oxidative dehydrogenation of propane. The effect of the preparation method, V loading, and reaction temperature on the performance of these oxygen carriers have been measured and discussed. It was found that the VOx species can be well distributed on the support when the V loading is low (5 wt.% and 10 wt.%), but they may become aggregated at higher loadings. For oxygen carriers with a higher V loading, the oxygen transport capacity of the oxygen carrier, propane conversion and COx selectivities increase, while the propylene selectivity decreases. With a V-loading of 10 wt.%, the maximum propylene yield was achieved. The VOx species were better distributed over the support when applying the impregnation method; however, at higher V loadings the V-based oxygen carriers prepared by mechanical mixing showed a larger oxygen transport capacity. The oxygen carriers prepared by impregnation showed a better performance for the oxidative dehydrogenation of propane (ODHP) and re-oxidation reactions compared to oxygen carriers prepared by mechanical mixing. Higher reaction temperatures are favorable for the re-oxidation reaction, but unfavorable for the propylene production.

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