Sr, Mg co-doped LaGaO3-δ supported Fe2O3 improved the water gas shift reaction with chemical looping

Effect of Supports on the Performance of La-Modified CoFe2O4 Oxygen Carriers in Chemical Looping Hydrogen Generation from Hydrogen-Rich Syngas

“…The Fe 2p spectrum exhibits two contributions, Fe 2p 3/2 and Fe 2p 1/2 , located at approximately 710.5 and 724.2 eV, respectively, accompanied by the satellite peaks at about 718.0 and 733.1 eV. ,, Furthermore, the Fe 2p 3/2 spectra can be divided into the peaks at around 710.0 and 712.1 eV, corresponding to the Fe 2+ 2p 3/2 and Fe 3+ 2p 3/2 , respectively. Similarly, the peaks at around 723.7 and 725.8 eV can be ascribed to Fe 2+ 2p 1/2 and Fe 3+ 2p 1/2 , respectively, in the Fe 2p 1/2 spectra .…”

“…Fresh OC activity tests reveal that LCF 6 YZ 4 has the best initial activity while LCF 6 T 4 performs the worst. However, the stability of OCs as intermediates for heat mass exchange in CL process under continuous high-temperature redox cycles is also an essential criterion to assess their performance. , This section therefore assesses the evolution of the reactivity of different OCs over 6 redox cycles and compares their performance stability. The mass of each OC in the fixed-bed experiments remains the same, as in Section .…”

“…Chemical looping (CL) is a novel alternative technology that uses oxygen carriers (OCs) to break down chemical reactions into multiple sub-reactions, optimizing material and energy distribution to achieve low cost and low emissions. − CL hydrogen generation (CLHG) is an energy-efficient, safe, and low-cost route. , The oxygen transfer between the fuel reactor (FR), steam reactor (SR), and air reactor (AR) through OCs achieves the synergistic production of high-purity hydrogen with the internal separation of CO 2 . , In the previous study, we proposed a novel CL cascade-coupled hydrogen generation (CL-CCHG) process to achieve efficient conversion and purification of hydrogen-rich syngas obtained from an auto-thermal CL reforming (CLRa) or CL gasification (CLG) process at the front end (Figure S1). This process avoids the use of water gas shift catalysts and CO 2 adsorbents, significantly reducing the energy consumption and cost of the post-treatment step.…”

“…6−9 CL hydrogen generation (CLHG) is an energy-efficient, safe, and low-cost route. 10,11 The oxygen transfer between the fuel reactor (FR), steam reactor (SR), and air reactor (AR) through OCs achieves the synergistic production of high-purity hydrogen with the internal separation of CO 2 . 12,13 In the previous study, 14 we proposed a novel CL cascade-coupled hydrogen generation (CL-CCHG) process to achieve efficient conversion and purification of hydrogen-rich syngas obtained from an auto-thermal CL reforming (CLRa) or CL gasification (CLG) process at the front end (Figure S1).…”