Investigation of perovskite supported composite oxides for chemical looping conversion of syngas

A‐ and B‐site Codoped SrFeO3 Oxygen Sorbents for Enhanced Chemical Looping Air Separation

“…Mixed conductive supports, such as perovskites, were shown to enhance the redox kinetics of these oxides. However, the reaction rates are nevertheless limited, requiring more than 800 °C to demonstrate appreciable oxygen storage capacity …”

Reduction kinetics of lanthanum ferrite perovskite for the production of synthesis gas by chemical-looping methane reforming

“…However, iron oxide based redox catalysts are not particularly active for methane oxidation (Cabello et al, 2014a;Shafiefarhood et al, 2014), and tend to have low selectivity toward methane partial oxidation. Notably, the reactivity and selectivity in CLMR process can be improved by combining different materials to bring synergetic effect or form solid solution (spinel, perovskite, et al) (Cabello et al, 2014a;Neal et al, 2014Neal et al, , 2015Bhavsar and Veser, 2013;Zhu et al, 2014;Chen et al, 2014). As mentioned above, although many work to increase the reactivity and syngas selectivity have been carried out for a long time, the reduction kinetics of oxygen carriers using methane as fuel at representative conditions of CLMR system has been seldom investigated (Dueso et al, 2012;Rashidi et al, 2013aRashidi et al, , 2013b).…”

Coal chemical-looping gasification of Ca-based oxygen carriers decorated by CaO

“…However, the consumption of gaseous products (primarily H 2 , CO and CH 4 ) could improve reaction R2 to increase the carbon conversion rate. In addition, due to the higher reaction rate of H 2 with the oxygen carrier than with CO as fuel, the relative reduction in the volume gas flow rate of H 2 was larger than that of CO [24]. Simultaneously, due to the improvement of reaction R2 by the oxygen carrier, the maximum volume gas flow rate of H 2 during CLG was slightly lower than that in coal gasification, whereas the maximum volume gas flow rate of CO during CLG was slightly higher than that in coal gasification.…”