Nanocasted Fe2O3-La0.75Sr0.25FeO3 composite materials for CO2 conversion by reverse water gas shift chemical looping
Journal
Chemical Engineering Communications
ISSN
00986445
Date Issued
2026
Author(s)
Abstract
The design of reverse water-gas shift by chemical looping (RWGS-CL) involves separating the reaction into two steps, oxidation and reduction. The CO yield is not limited by the thermodynamic equilibrium of RWGS. In addition, no separation of H2 is required. Composites of iron oxide and La0.75Sr0.25FeO3 (LSF) perovskite were synthesized using the nanocasting method as high-performance oxygen storage materials to convert CO2 into CO by the RWGS-CL process. The textural properties, CO2 reduction reactivity, and stability of LSF were investigated. The mesoporous silica template, SBA-15, was partially removed to maintain the mesoporous structure of the LSF and achieve a high specific surface area of 314 m2/g. Composite LSF with high Fe2O3 achieved outstanding performance, and experiment with 10-cycle RWGS-CL at 600 °C showed an average CO yield of 8.6 mmol/g/cycle, which was 5.4-fold higher than that of the pure LSF under the same experiment conditions, maintaining a near 98% productivity retention rate.
Subjects
Chemical looping
CO2 conversion
nanocasting
oxygen storage material
reverse water-gas shift
Publisher
Taylor and Francis Ltd.
Type
journal article