Chemical looping technology – a manifestation of a novel fluidization and fluid-particle system for CO2 capture and clean energy conversions

Wang, Dawei; Joshi, Anuj; Fan, Liang‐Shih

doi:10.1016/j.powtec.2022.117814

Cited by 21 publications

(15 citation statements)

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“…Resulting from three decades of research, a wealth of knowledge has been created for the chemical looping technology in terms of the oxygen carrier selection and performance, reactor design and operation, and the overall technological feasibility, primarily in the context of CO 2 capture from fossil fuel combustion via chemical looping combustion (CLC). 13–51 Shown in Fig. 2a, CLC technologies generally involves two cyclic steps: (1) the use of metal oxide(s) oxygen carrier as the oxidant to fully combust fossil fuels such as coal or methane; (2) the regeneration of the reduced metal oxide(s) in step 1 with air.…”

Section: Introductionmentioning

confidence: 99%

Mixed oxides as multi-functional reaction media for chemical looping catalysis

Liu

2023

Chem. Commun.

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Section: Introductionmentioning

confidence: 99%

Mixed oxides as multi-functional reaction media for chemical looping catalysis

Liu

2023

Chem. Commun.

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“…Although the goals can be achieved by switching from fossil fuels to renewable energy in the future, renewable energy alone cannot meet the large demand for energy in recent years . Therefore, the utilization of fossil energy conversion technologies with CO 2 capture becomes necessary. − …”

Section: Introductionmentioning

confidence: 99%

Investigations on Kinetics and Mechanisms of CaCO₃ Calcination in Calcium Looping

Guo

Xue

et al. 2023

Ind. Eng. Chem. Res.

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Calcium looping-based CO2 capture is generally considered more efficient than conventional postcombustion CO2 capture. Calcium carriers’ calcination in the regenerator is crucial because proper operating parameters can provide regenerated carriers suitable for the gasifier and prevent sintering. This work focuses on the calcination behavior of CaCO3 in calcium looping systems. In this study, the calcination kinetic parameters under various conditions were investigated using a model-free isoconversional method based on nonisothermal thermogravimetric analysis in a macroscope, in combination with X-ray diffraction tests of the samples in a microscope. Results in the macroscope showed that the apparent activation energy ranges from 121.8 to 163.0 kJ/mol under a conversion range of 0.3–0.9, and the CaCO3 calcination mechanism involves transient nucleation and two-dimensional growth. Results observed from the microscope demonstrated that CaCO3 tends to be calcined on a plane, consistent with the macroscope model with two-dimensional nucleation. Since the microscopic mechanism is reflected, the kinetic model can be widely adopted, and calcium-based carrier modification strategies can also be proposed to prevent sintering of the carrier perpendicular to the (1̅04) plane.

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“…In particular, recent research efforts have shown that this technique can be relevant for producing various chemicals, including hydrogen. 2,5,6 While there exist several different variants of CLC, this study has exclusively focused on chemical looping oxygen uncoupling (CLOU), which distinguishing feature is that the metal oxide spontaneously decomposes, thereby releasing oxygen to the gas phase, under the high temperature and reducing conditions in the fuel reactor. [2][3][4]7 As a result, there are no direct interactions between the OC and the fuel.…”

Section: ■ Introductionmentioning

confidence: 99%

“…Since it is challenging to enhance the efficiency of existing OCs, there is a strong need for finding new materials. 5,19 Fortunately, high-throughput screening that utilizes the efficiency of modern computers and the ever-increasing volume of data stored in publicly available databases provides a viable route for achieving this goal.…”

Section: ■ Introductionmentioning

confidence: 99%

“…A key issue related to the development of CLC is the identification of suitable OCs, since the latter must generally satisfy a variety of different criteria. − , This includes favorable thermodynamics and kinetics, with respect to oxidation and reduction, as well as a significant oxygen storage capacity. Various practical aspects such as high chemical and mechanical stability to prevent breakage, agglomeration, attrition, and fouling together with low cost, toxicity, and environmental impact are, however, equally important.…”

Section: Introductionmentioning

confidence: 99%

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Discovery of Oxygen Carriers by Mining a First-Principle Database

et al. 2023

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Chemical looping is an innovative technique that relies, to a large extent, on the possibility of finding new oxygen carriers. Until now, these materials have primarily been identified via experimental techniques and therefrom derived insights. However, this is both costly and time-consuming. To speed-up this process, we have applied a computational screening approach based on energetic data retrieved from the Open Quantum Materials Database. In particular, we have considered combinations of all mono-, bi-, and trimetallic alloys and mixed oxides with up to three distinctive phases. Here, we specifically focus on a technique referred to as chemical looping oxygen uncoupling, which is especially suitable for solid fuels, e.g., combustion of biomass for negative CO 2 emissions. The formation energies obtained for the materials of interest were used to identify phase transitions that are likely to occur under conditions relevant for chemical looping oxygen uncoupling. Given these criteria, the initial list of 300000 materials is reduced by a factor of 20, and after filtering out rare, radioactive, toxic, or harmful elements only 1000 remain. When considering the abundance of elements in the ranking criteria, most of the highest ranking phases include Cu, Mn, and Fe. This adds credibility to the procedure, as many viable oxygen carriers for chemical looping oxygen uncoupling that have been studied experimentally contain these elements. While Cr-based materials have not been widely explored for this application, our study suggests that this might be worthwhile since these occur more frequently than Fe. Other elements that would be interesting as additional components include Ba, K, Na, Al, and Si.

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Chemical looping technology – a manifestation of a novel fluidization and fluid-particle system for CO2 capture and clean energy conversions

Cited by 21 publications

References 163 publications

Mixed oxides as multi-functional reaction media for chemical looping catalysis

Mixed oxides as multi-functional reaction media for chemical looping catalysis

Investigations on Kinetics and Mechanisms of CaCO₃ Calcination in Calcium Looping

Discovery of Oxygen Carriers by Mining a First-Principle Database

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Chemical looping technology – a manifestation of a novel fluidization and fluid-particle system for CO2 capture and clean energy conversions

Cited by 21 publications

References 163 publications

Mixed oxides as multi-functional reaction media for chemical looping catalysis

Mixed oxides as multi-functional reaction media for chemical looping catalysis

Investigations on Kinetics and Mechanisms of CaCO3 Calcination in Calcium Looping

Discovery of Oxygen Carriers by Mining a First-Principle Database

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Product

Resources

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Investigations on Kinetics and Mechanisms of CaCO₃ Calcination in Calcium Looping