Two-step thermochemical looping using modified ceria-based materials for splitting CO2
Source abstract
Abstract
This work presents an investigation of CeO2, Ce0.5Zr0.5O2 (CZ), and La, Pr-doped CeO2–ZrO2 (LP-CZ) for thermochemical two-step splitting of CO2. The materials are synthesized by coprecipitation method and characterized by X-ray diffraction, scanning electron microscopy, Raman spectroscopy, and H2 temperature-programmed reduction. The cyclic CO2 splitting performance of the samples is measured using thermogravimetric analysis. The results reveal that CZ and LP-CZ show comparable splitting efficiency with the average CO productions of 272 and 288 μmol g−1, respectively, which are much larger than those of CeO2. CZ and LP-CZ benefit from the Zr modification on their structure (t″ phase) and numerous oxygen vacancies which apparently facilitates oxygen migration. LP-CZ exhibits more rapid recovery post-splitting compared to the other two samples, as a result of its better thermal stability and favorable “vacancy-rich” structure for oxygen exchange and migration. This has potential to be driven for further developments in various applications.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Chemical Looping and Thermochemical Processes · Catalytic Processes in Materials Science · Catalysis and Oxidation Reactions
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (39)
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