Structurally improved, TiO2-incorporated, CaO-based pellets for thermochemical energy storage in concentrated solar power plants

Bai, Shengbin; Sun, Jian; Zhou, Zijian; Bu, Changsheng; Chen, Xiaole; Yang, Yuandong; Wang, Ruilin; Guo, Yanxia; Zhao, Chuanwen; Liu, Wenqiang

doi:10.1016/j.solmat.2021.111076

Cited by 69 publications

(29 citation statements)

References 50 publications

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“…The technologies restraining RESs like wind and solar energy are determined by a power compression different instruction of value lower than fossil fuels [68][69][70]. As a result, the transmission to RESs is envisaged to strengthen the universal rivalry for land.…”

Section: Solar Energy Usage In the Worldmentioning

confidence: 99%

Performance Evaluation of Solar Power Plants: A Review and a Case Study

et al. 2021

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The world’s electricity generation has increased with renewable energy technologies such as solar (solar power plant), wind energy (wind turbines), heat energy, and even ocean waves. Iran is in the best condition to receive solar radiation due to its proximity to the equator (25.2969° N). In 2020, Iran was able to supply only 900 MW (about 480 solar power plants and 420 MW home solar power plants) of its electricity demand from solar energy, which is very low compared to the global average. Yazd, Fars, and Kerman provinces are in the top ranks of Iran, with the production of approximately 68, 58, and 47 MW using solar energy, respectively. Iran also has a large area of vacant land for the construction of solar power plants. In this article, the amount of electricity generation using solar energy in Iran is studied. In addition, the construction of a 10 MW power plant in the city of Sirjan is economically and technically analyzed. The results show that with US$16.14 million, a solar power plant can be built in the Sirjan region, and the initial capital will be returned in about four years. The results obtained using Homer software show that the highest maximum power generation is in July.

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Section: Solar Energy Usage In the Worldmentioning

confidence: 99%

Performance Evaluation of Solar Power Plants: A Review and a Case Study

et al. 2021

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“…The third-generation CSP plants can store thermal energy at over 700 °C, which adopts supercritical carbon dioxide (sCO 2 ) power cycle as a thermodynamic cycle, achieving the solar-to-electric efficiency of up to >40% . The common sensible heat storage materials (i.e., heat-conduction oil and molten salts) for the first- and second-generation CSP plants are unable to withstand the high temperature of 700 °C. , Thermochemical energy storage (TCES) technology is therefore proposed for high-temperature heat storage in the third-generation CSP system. , TCES can achieve thermal energy storage via endothermic chemical reactions, which allows long-term thermal energy storage with minimal heat loss . The commonly used TCES materials include hydroxides (e.g., Ca(OH) 2 ), carbonates (e.g., CaCO 3 , K 2 CO 3 ), metal oxides (e.g., Cu 2 O, Co 3 O 4 ), sulfates (e.g., ZnSO 4 ), and hydrides (e.g., MgH 2 ).…”

Section: Introductionmentioning

confidence: 99%

“…The carbonation of the CaL-CSP system is carried out under a pure CO 2 atmosphere at 850 °C to improve the thermoelectric efficiency . Calcination can be conducted under mild (∼750 °C, pure He or N 2 ) or harsh (∼950 °C, pure CO 2 ) conditions …”

Section: Introductionmentioning

confidence: 99%

Enhanced Thermochemical Energy Storage Stability of CaO-Based Composite Pellets Incorporated with a Zr-Based Stabilizer

Zhou

Liu

et al. 2021

Energy Fuels

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Calcium looping is a potential thermochemical energy storage technology applied in a high-temperature working window. However, CaCO3/CaO materials are prone to encounter severe sintering, exhibiting poor thermal energy storage/release stability. To improve the thermochemical energy storage stability, different amounts (5, 15, and 30 wt %) of a Zr-based stabilizer were incorporated into CaCO3/CaO materials. Moreover, the graphite-casting method was adopted to prepare the Zr-stabilized, CaO-based composite pellets aiming to improve the practicability. The incorporation of the Zr-based stabilizer can effectively resist the sintering of CaO-based composite powders during a high-temperature precalcination process. It is mainly attributed to the large amounts of generated, nanosized CaZrO3 grains possessing desirable antisintering ability evenly distributed within the composites. Particularly, the Zr-stabilized, CaO-based composite pellets containing 30 wt % of CaZrO3 possess a relatively high compression strength of 2.28 ± 0.87 MPa and a desirable thermal storage density of 1.15 GJ/t after 20 cycles. Additionally, the graphite-casted, Zr-stabilized, CaO-based composite pellets have potential to be applied in a large-scale thermochemical energy storage system because the graphite-casting method is easy to be scaled-up.

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“… 3 Carbon capture and storage (CCS) technology is a technology that collects CO 2 from large power plants and stores it in various ways to avoid its emission into the atmosphere. 4 , 5 Oxy-fuel combustion technology based on the recycling of CO 2 is considered to be the most promising advanced combustion technology. 6 , 7 At present, oxy-fuel combustion in a fluidized bed is an advanced combustion method widely used.…”

Section: Introductionmentioning

confidence: 99%

Interference Effect of Experimental Parameters on the Mercury Removal Mechanism of Biomass Char under an Oxy-Fuel Atmosphere

Zhu

Wang

et al. 2021

ACS Omega

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In this paper, the effect of temperature, adsorption bed height, and initial mercury concentration under oxy-fuel combustion on mercury adsorption by 1% NH 4 Cl-modified biomass char was studied. Modification enriched the pore structure of biomass char and increased the number of surface functional groups. Higher temperature would lead to the destruction of van der Waals and reduce the adsorption efficiency, while the change of adsorption bed height had no obvious effect. Adsorption thermodynamics shows that the mercury removal process is a spontaneous exothermic process. The increase of initial mercury concentration would increase the driving force of mercury diffusion to the surface and improve the adsorption capacity. Meanwhile, three kinetic models including the intraparticle diffusion model, pseudo-first-order model, and pseudo-second-order model were applied to explore the internal mechanism of mercury adsorption by biomass char. The results showed that the pseudo-first-order model and pseudo-second-order model could accurately describe the adsorption process, which meant that the progress of external mass transfer played an important role in the adsorption of mercury while chemical adsorption should not be ignored. The intraparticle diffusion model indicated that internal diffusion was not the only step to control the entire adsorption process and did not have an inhibition on mercury removal. Higher initial mercury concentration would promote the external mass transfer progress and chemical adsorption progress. In addition, higher temperature inhibited the external mass transfer, which was not conducive to the adsorption of mercury.

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Structurally improved, TiO2-incorporated, CaO-based pellets for thermochemical energy storage in concentrated solar power plants

Cited by 69 publications

References 50 publications

Performance Evaluation of Solar Power Plants: A Review and a Case Study

Performance Evaluation of Solar Power Plants: A Review and a Case Study

Enhanced Thermochemical Energy Storage Stability of CaO-Based Composite Pellets Incorporated with a Zr-Based Stabilizer

Interference Effect of Experimental Parameters on the Mercury Removal Mechanism of Biomass Char under an Oxy-Fuel Atmosphere

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