Preparation and Application of the Sol–Gel Combustion Synthesis-Made CaO/CaZrO3 Sorbent for Cyclic CO2 Capture Through the Severe Calcination Condition

Wang, Baowen; Song, Xiaoyong; Wang, Zonghua; Chen, Zheng

doi:10.1016/j.cjche.2014.06.034

Cited by 23 publications

(6 citation statements)

References 59 publications

(106 reference statements)

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“…Different supports, such as Zr, can be used in sol-gel techniques [114][115][116]. These showed a similar CO uptake than the other particles synthesised with this procedure.…”

Section: Figure 11mentioning

confidence: 88%

Calcium looping sorbents for CO2 capture

2016

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Calcium looping (CaL) is a promising technology for the decarbonation of power generation and carbon-intensive (cement, lime and steel) industries. Although CaL has been extensively researched, some issues need to be addressed before the deployment of this technology at commercial scale. One of the important challenges for CaL is decay of sorbent reactivity during capture/regeneration cycles. Numerous techniques have been explored to enhance natural sorbent performance, to create new synthetic sorbents, and to reactivate and re-use deactivated material. This review provides a critical analysis of natural and synthetic sorbents developed for use in CaL. Special attention is given to the suitability of modified materials for utilisation in fluidised-bed systems. Namely, besides requirements for a practical adsorption capacity; a mechanically strong material, resistant to attrition, is required for the fluidised bed CaL operating conditions. However, the main advantage of CaL is that it employs a widely available and inexpensive sorbent. Hence, a compromise must be made between improving the sorbent performance and increasing its cost, which means a relatively practical, scalable, and inexpensive method to enhance sorbent performance, should be found. This is often neglected when developing new materials focusing only on very high adsorption capacity.

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“…Different supports, such as Zr, can be used in sol-gel techniques [114][115][116]. These showed a similar CO uptake than the other particles synthesised with this procedure.…”

Section: Figure 11mentioning

confidence: 88%

Calcium looping sorbents for CO2 capture

2016

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“…the use of fresh sorbent). 18 Considerable research efforts have been made towards developing new sorbents that have a more stable reactivity over many cycles, using techniques such as sol-gel combustion, [19][20][21][22][23][24][25][26][27] organic/acid modications, [28][29][30][31][32][33][34] calcium carbonate precipitation 33,35,36 and granulation, [37][38][39][40][41][42][43][44] among others. Most of these methods have proven to produce materials that have higher capture capacity than natural sorbents.…”

Section: Introductionmentioning

confidence: 99%

Effect of SO₂and steam on CO₂capture performance of biomass-templated calcium aluminate pellets

et al. 2016

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Four types of synthetic sorbents were developed for high-temperature post-combustion calcium looping CO capture using Longcal limestone. Pellets were prepared with: lime and cement (LC); lime and flour (LF); lime, cement and flour (LCF); and lime, cement and flour doped with seawater (LCFSW). Flour was used as a templating material. All samples underwent 20 cycles in a TGA under two different calcination conditions. Moreover, the prepared sorbents were tested for 10 carbonation/calcination cycles in a 68 mm-internal-diameter bubbling fluidized bed (BFB) in three environments: with no sulphur and no steam; in the presence of sulphur; and with steam. When compared to limestone, all the synthetic sorbents exhibited enhanced CO capture performance in the BFB experiments, with the exception of the sample doped with seawater. In the BFB tests, the addition of cement binder during the pelletisation process resulted in the increase of CO capture capacity from 0.08 g CO per g sorbent (LF) to 0.15 g CO per g sorbent (LCF) by the 10 cycle. The CO uptake in the presence of SO dramatically declined by the 10 cycle; for example, from 0.22 g CO per g sorbent to 0.05 g CO per g sorbent in the case of the untemplated material (LC). However, as expected all samples showed improved performance in the presence of steam, and the decay of reactivity during the cycles was less pronounced. Nevertheless, in the BFB environment, the templated pellets showed poorer CO capture performance. This is presumably because of material loss due to attrition under the FB conditions. By contrast, the templated materials performed better than untemplated materials under TGA conditions. This indicates that the reduction of attrition is critical when employing templated materials in realistic systems with FB reactors.

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“…Analogously, the active metal oxides (most commonly (earth) alkali metal oxides) were initially proposed to be used in form of natural minerals, e.g., limestone or dolomite. Most of the synthetic carbon dioxide sorbent materials are based on the carbonation–decarbonation equilibrium of Li 2 O, ,− MgO, − or CaO. ,− The optimal operating temperature of a carbon dioxide sorbent material is highly dependent on the chosen (earth) alkali metal, as illustrated by Figure and Figure .…”

Section: Chemical Loopingmentioning

confidence: 99%

“…Magnesia-based sorbents are most often modified with Al 2 O 3 , − thereby forming a hydrotalcite-like structure, and/or with K 2 CO 3 . − While many different additives for calcium oxide-based sorbents have been studied, Al 2 O 3 − and ZrO 2 − are by far the most widely studied. In the presence of CaO, these metal oxides are typically transformed into Ca 12 Al 14 O 33 and CaZrO 3 .…”

Section: Chemical Loopingmentioning

confidence: 99%

110th Anniversary: Carbon Dioxide and Chemical Looping: Current Research Trends

Buelens

Poelman

Marin

et al. 2019

Ind. Eng. Chem. Res.

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Driven by the need to develop technologies for converting CO 2 , an extraordinary array of chemical looping based process concepts has been proposed and researched over the past 15 years. This review aims at providing first a historical context of the molecule CO 2 , which sits at the center of these developments. Then, different types of chemical looping related to CO 2 are addressed, with attention to process concepts, looping materials, and reactor configurations. Herein, focus lies on the direct conversion of carbon dioxide into carbon monoxide, a process deemed to have economic potential.

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Preparation and Application of the Sol–Gel Combustion Synthesis-Made CaO/CaZrO3 Sorbent for Cyclic CO2 Capture Through the Severe Calcination Condition

Cited by 23 publications

References 59 publications

Calcium looping sorbents for CO2 capture

Calcium looping sorbents for CO2 capture

Effect of SO₂and steam on CO₂capture performance of biomass-templated calcium aluminate pellets

110th Anniversary: Carbon Dioxide and Chemical Looping: Current Research Trends

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Preparation and Application of the Sol–Gel Combustion Synthesis-Made CaO/CaZrO3 Sorbent for Cyclic CO2 Capture Through the Severe Calcination Condition

Cited by 23 publications

References 59 publications

Calcium looping sorbents for CO2 capture

Calcium looping sorbents for CO2 capture

Effect of SO2and steam on CO2capture performance of biomass-templated calcium aluminate pellets

110th Anniversary: Carbon Dioxide and Chemical Looping: Current Research Trends

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Product

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Effect of SO₂and steam on CO₂capture performance of biomass-templated calcium aluminate pellets