scholarly journals Cyclic oxygen exchange capacity of Ce-doped V2O5 materials for syngas production via high-temperature thermochemical-looping reforming of methane

RSC Advances ◽  
2021 ◽  
Vol 11 (37) ◽  
pp. 23095-23104
Asim Riaz ◽  
Wojciech Lipiński ◽  
Adrian Lowe

Cerium doping into the V2O5 lattice forms a reversible V2O3/VO redox pair after sequential methane partial oxidation and CO2/H2O splitting reactions and produces syngas (H2, CO) with fast rates and high oxygen exchange capacity.

Research ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-12 ◽  
Asim Riaz ◽  
Muhammad Umair Ali ◽  
T. Gabriel Enge ◽  
Takuya Tsuzuki ◽  
Adrian Lowe ◽  

The effects of V and Ce concentrations (each varying in the 0–100% range) in vanadia–ceria multiphase systems are investigated for synthesis gas production via thermochemical redox cycles of CO2 and H2O splitting coupled to methane partial oxidation reactions. The oxidation of prepared oxygen carriers is performed by separate and sequential CO2 and H2O splitting reactions. Structural and chemical analyses of the mixed-metal oxides revealed important information about the Ce and V interactions affecting their crystal phases and redox characteristics. Pure CeO2 and pure V2O5 are found to offer the lowest and highest oxygen exchange capacities and syngas production performance, respectively. The mixed-oxide systems provide a balanced performance: their oxygen exchange capacity is up to 5 times higher than that of pure CeO2 while decreasing the extent of methane cracking. The addition of 25% V to CeO2 results in an optimum mixture of CeO2 and CeVO4 for enhanced CO2 and H2O splitting. At higher V concentrations, cyclic carbide formation and oxidation result in a syngas yield higher than that for pure CeO2.

2018 ◽  
Vol 565 ◽  
pp. 119-126 ◽  
Zhitao Wang ◽  
Yi Cheng ◽  
Xin Shao ◽  
Jean-Pierre Veder ◽  
Xun Hu ◽  

2007 ◽  
Vol 46 (4) ◽  
pp. 1114-1119 ◽  
Steven F. Rice ◽  
Anthony H. McDaniel ◽  
Ethan S. Hecht ◽  
Alicia J. J. Hardy

2007 ◽  
Vol 73 (1-2) ◽  
pp. 84-97 ◽  
T. Montini ◽  
A.M. Condò ◽  
N. Hickey ◽  
F.C. Lovey ◽  
L. De Rogatis ◽  

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