Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7706948 | International Journal of Hydrogen Energy | 2018 | 15 Pages |
Abstract
Thermal reduction of the partial oxidation of CH4NiFe2O4 followed by oxidation with H2O and CO2 was numerically investigated for H2 and CO production. P1 radiation model was used to account for radiative heat transfer. The synergistic effect of the reactivity of Fe/Ni exhibited a very promising strategy for producing 45% of syngas with 2.54 ratios of H2:CO at the first step and 55% of syngas with 2.34 ratios of H2:CO at the second step. The increase in incident radiation heat flux to 437.69Â kW/m2 resulted in higher reduction kinetics of species conversion until the formation of oxygen carriers consisting of 65% of FeO, 35% of NiFe and 2.6% of carbon deposition. However, during the reduction process, the decrease in total pressure to 0.05Â MPa enhanced the species reactivity and the production of H2 and CO while minimizing carbon deposition. Moreover, the oxidation temperature, operating pressure and the concentration of oxidizing species have strong impacts on the oxidation kinetics. Unlike high thermal reduction process, increasing the total pressure to 1Â MPa has favorable effects on syngas production at oxidation step.
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Electrochemistry
Authors
Bachirou Guene Lougou, Yong Shuai, Zhang Guohua, Gédéon Chaffa, Clément Ahouannou, Heping Tan,