Using a hierarchically-structured CuO@TiO2-Al2O3 oxygen carrier for chemical looping air separation in a paralleled fluidized bed reactor

摘要: Abstract Chemical looping air separation (CLAS) provides a novel route for O2 production, which can be coupled with integrated gasification combined cycle (IGCC) or oxy-fuel combustion to address the source issue. The development of regenerable and robust oxygen carrier, should able release gaseous in O2-deficient atmosphere (usually CO2/H2O) regenerate itself by oxidizing air, is critical successful deployment CLAS systems. In this work, CuO@TiO2-Al2O3 carrier hierarchical structure (i.e., CuO-rich, TiO2-stabilized Al2O3-supported), was prepared self-assembly template synthesis (SATCS) method, adopted continuous production paralleled fluidized bed reactor. Before which, isothermal experiments thermogravimetric analyzer (TGA) were first conducted analyze effect temperature on OC decoupling regeneration characteristics. influence inlet gas flow rate then investigated batch Appropriate reaction as well reactor ultimately attained. During consecutive operation 10 h, stream O2/CO2 relatively stable high concentration (19.7–27.6 vol, steam free basis) obtained. superior reactivity stability achieved during indicate that it could promising candidate process.