Development of Highly Effective CaO‐based, MgO‐stabilized CO<sub>2</sub> Sorbents via a Scalable “One‐Pot” Recrystallization Technique

Broda, Małgorzata A.; Kierzkowska, Agnieszka M.; Müller, Christoph R.

doi:10.1002/adfm.201400862

Cited by 74 publications

(45 citation statements)

References 34 publications

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“…[202][203][204] The mobility of metal ions in oxide raises rapidly in the vicinity of its Tammann temperature. If the supported oxide is easy to diffuse or transfer in the pores of silica at elevated temperatures, the potential reactions of these basic oxides with the siliceous support could be accelerated during activation, which is harmful to the maintenance of the mesoporous structure.…”

Section: Post-synthetic Modificationmentioning

confidence: 99%

Design and fabrication of mesoporous heterogeneous basic catalysts

2015

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Mesoporous solid bases are extremely desirable in green catalytic processes, due to their advantages of accelerated mass transport, negligible corrosion, and easy separation. Great progress has been made in mesoporous solid bases in the last decade. In addition to their wide applications in the catalytic synthesis of organics and fine chemicals, mesoporous solid bases have also been used in the field of energy and environmental catalysis. Development of mesoporous solid bases is therefore of significant importance from both academic and practical points of view. In this review, we provide an overview of the recent advances in mesoporous solid bases, which is basically grouped by the support type and each category is illustrated with typical examples. Cooperative catalysts derived from the incorporation of additional functionalities (i.e. acid and metal) into mesoporous solid bases are also included. The fundamental principles of how to design and fabricate basic materials with mesostructure are highlighted. The mechanism of the formation of basic sites in different mesoporous systems is discussed as well.

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Section: Post-synthetic Modificationmentioning

confidence: 99%

Design and fabrication of mesoporous heterogeneous basic catalysts

2015

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“…1-3 Calcium looping 4, 5 is a promising technique for CO 2 capture because Ca-based sorbents have a high stoichiometric sorption capacity, fast sorption rate and low cost of the naturally existing precursor i.e., limestone. [9][10][11] The sorption properties of Ca-based sorbents, including the sorption capacity and rate, greatly depend much on the particle size and structural morphology of the sorbents. 8 Carbonation of Ca-based sorbents has a theoretical stoichiometric sorption capacity of 0.786 g CO 2 per g CaO, however, few sorbents can reach or even approach this value.…”

Section: Introductionmentioning

confidence: 99%

Preparation of cage-like nano-CaCO₃ hollow spheres for enhanced CO₂ sorption

Ping

2015

RSC Adv.

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Cage-like nano-CaCO 3 hollow spheres with different cavity diameters for CO 2 sorption were prepared using the template-directed synthesis method. Carbon sphere templates with different diameters were synthesized via a hydrothermal reaction of starch under variable conditions. Field emission scanning electron microscopy (SEM) and transmission electron microscope (TEM) images indicated that the synthesized cage-like nano-CaCO 3 hollow spheres had different cavity diameters of 0.52 µm, 1.62 µm and 2.93 µm. The hollow spheres shells were composed of many uniform nanoparticles with diameters of approximately 80 nm, as supported by the X-ray diffraction (XRD) results. Furthermore, the CO 2 sorption properties of the cage-like nano-CaCO 3 hollow spheres were analyzed by thermo-gravimetric analysis (TGA).The sorption capacity of the optimum sample with a diameter of 1.62 µm reached the 0.786 g CO2 g CaO -1 at 600 °C and exceeded the sorption capacity of the reference nano-CaCO 3 sorbents by 45 %. The sorption properties of the sample within the rapid reaction stage at the different temperatures of 550 °C, 600 °C and 650 °C were also evaluated. The results demonstrated that the sample exhibited a 30 % higher sorption rate than nano-CaCO 3 . Therefore, cage-like nano-CaCO 3 hollow spheres possess enhanced CO 2 sorption capacity and higher sorption rates.

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“…3a and b. The sample presents the typical rodshape particles of calcium acetate 55 together with impurities that correspond to the other oxides present in the material such as Mn, Cr and Si oxides. On the other hand, the cycled samples ( Fig.…”

Section: 54mentioning

confidence: 99%

Use of steel slag for CO₂ capture under realistic calcium-looping conditions

et al. 2016

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aIn this study, CaO derived from steel slag pretreated with diluted acetic acid has been tested as a dry sorbent for CO 2 capture under realistic Ca-Looping (CaL) conditions, which necessarily implies calcination under high CO 2 partial pressure and fast transitions between carbonation and calcination stages. The multicycle capture performance of the sorbent has been investigated by varying the precalcination time, carbonation/calcination residence times and with the introduction of a recarbonation stage. Results show that the sorbent can be regenerated in very short residence times at 900 C under high CO 2 partial pressure, thus reducing the calciner temperature by about 30-50 C when compared to limestone. Although the introduction of a recarbonation stage to reactivate the sorbent, as suggested in previous studies for limestone, results in a slightly enhanced capture capacity, the sorbent performance can be significantly improved if the main role of the solid-state diffusion-controlled carbonation is not dismissed. Thus, a notable enhancement of the capture capacity is achieved when the carbonation residence time is prolonged beyond just a few minutes, which suggests a critical effect of solids residence time in the carbonator on the CO 2 capture efficiency of the CaL process when integrated into a power plant.

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Development of Highly Effective CaO‐based, MgO‐stabilized CO₂ Sorbents via a Scalable “One‐Pot” Recrystallization Technique

Cited by 74 publications

References 34 publications

Design and fabrication of mesoporous heterogeneous basic catalysts

Design and fabrication of mesoporous heterogeneous basic catalysts

Preparation of cage-like nano-CaCO₃ hollow spheres for enhanced CO₂ sorption

Use of steel slag for CO₂ capture under realistic calcium-looping conditions

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Development of Highly Effective CaO‐based, MgO‐stabilized CO2 Sorbents via a Scalable “One‐Pot” Recrystallization Technique

Cited by 74 publications

References 34 publications

Design and fabrication of mesoporous heterogeneous basic catalysts

Design and fabrication of mesoporous heterogeneous basic catalysts

Preparation of cage-like nano-CaCO3 hollow spheres for enhanced CO2 sorption

Use of steel slag for CO2 capture under realistic calcium-looping conditions

Contact Info

Product

Resources

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Development of Highly Effective CaO‐based, MgO‐stabilized CO₂ Sorbents via a Scalable “One‐Pot” Recrystallization Technique

Preparation of cage-like nano-CaCO₃ hollow spheres for enhanced CO₂ sorption

Use of steel slag for CO₂ capture under realistic calcium-looping conditions