Fe3O4/ZrO2 Composite as a Robust Chemical Looping Oxygen Carrier: A Kinetics Study on the Reduction Process

• DOI: 10.1021/acsaem.1c01152
• Publication Date: 2021-07-15T21:11:31Z
• Authors: Qiming Tang; Yuxi Ma; Kevin Huang
• Keywords: Chemical-Looping Combustion; Isothermal process

FeOx is the most popular choice of oxygen carriers for chemical looping hydrogen (CLH) reactor and solid oxide iron–air redox battery (SOIARB) due to its earth abundance, low cost, high content. However, performance an Fe/FeOx cycle critically limited by reduction kinetics FeOx. Aimed at understanding ultimately improving reduction, we here report a study on isothermal H2 Fe3O4/ZrO2 composite (derived from Fe2O3/ZrO2) pure Fe3O4 Fe2O3) as carrier in CLH SOIARB environment. We observe that prevailing form, which carried out, under 10% H2O–Ar 600–800 °C, Fe3O4. show Fe follows two consecutive steps can be reasonably described phenomenological chemical-controlled diffusion-controlled kinetic models. also demonstrate presence ZrO2 critical preventing particles sintering, obtaining reliable data, stable operation overall cycles. The obtained parameters provide firsthand data engineering design practical reactors SOIARBs.