Prussian blue derived Ca-Fe bifunctional materials for chemical looping CO2 capture and in-situ conversion

In Situ Capture and Conversion of CO2 to CO Using CaZrO3 Promoted Fe–CaO Dual-Functional Material

“…, as reported by Jin et al 11 Hence, CaZrO 3 functions as a physical barrier, which effectively delays the agglomeration and sintering of CaO in DFMs. This enhances surface basicity, dispersion, and reducibility and delays the agglomeration and sintering of CaO.…”

“…In the RWGS reaction, various heterogeneous catalysts based on transition metals (Ni, Cu, Fe, Co, and Mo) and metal oxides as supports (ZrO 2 , MgO, Al 2 O 3 , CeO 2 , etc.) have been investigated at temperatures ranging from 200 to 650 °C. − RWGS allows to match the high temperature of calcium looping (CaL) for CO 2 capture in many studies. Combining CaL with RWGS processes allows for the generation of CO, which can be converted into chemicals and fuels with the aid of well-established technologies, including the Fischer–Tropsch process .…”

Probing the Performance of a Ni–Ca–Ce Dual-Functional Material for Integrated CO2 Capture and Utilization from a Synthetic Flue Gas Approximating Industrial Composition

“…In contrast, reducible oxides such as CeO 2 are well-known to be redox-active and applicable for CL-mediated rWGS (CL-rWGS) . Moreover, experimental results from other researchers have also reported CO production during the CO 2 capture step when the DFM comprised reducible oxides such as ceria or iron oxides. , Based on the above reasoning, it is assumed that CO production in the CO 2 capture step can be solely attributed to ceria in the DFM acting as the solid mediator for CL-rWGS. The absence of CO in Figure d, which shows the first experiment of the campaign (Table S1), corroborates this hypothesis.…”

“…This material was found to achieve a CO 2 conversion of 90% and a CO selectivity close to 100% when operated at 650 °C in an ICCU-rWGS cycle, using 10% CO 2 in the CO 2 capture step and pure H 2 in the CO 2 utilization step. Jin et al proposed a Prussian blue-derived Ca–Fe/Zr bifunctional material for a variant of the ICCU-rWGS cycle in which the bulk of the CO is formed during the CO 2 capture step over reduced Fe . Within their set of sample compositions, they observed that the space-time yield of CO during the CO 2 releasing step increases with the CaO loading, whereas an optimum Fe 2 O 3 loading exists for maximizing the space-time yield of CO during the CO 2 capture step.…”

“…Jin et al proposed a Prussian blue-derived Ca−Fe/Zr bifunctional material for a variant of the ICCU-rWGS cycle in which the bulk of the CO is formed during the CO 2 capture step over reduced Fe. 15 Within their set of sample compositions, they observed that the space-time yield of CO during the CO 2 releasing step increases with the CaO loading, whereas an optimum Fe 2 O 3 loading exists for maximizing the space-time yield of CO during the CO 2 capture step. In another alternative approach, Sun and co-workers studied the application of industrially supplied CaO powder directly as functional material for ICCU-rWGS under 15% CO 2 during carbonation and pure H 2 during the rWGS step of the cycle.…”