APPLIED ENERGY
·
2020
·
IF 8.848
Hao Sun,Yingjie Li,Xianyao Yan,Jianli Zhao,Zeyan Wang
The calcium looping energy storage is a promising technique for thermochemical energy storage in concentrated solar power plants. Nevertheless, natural CaO-based materials, such as limestone, have an obvious decline in energy storage capacity during cyclic CaO/CaCO 3 energy storage. In this work, a novel Al 2 O 3 /CeO 2 co-doped CaO-based material for energy storage is synthesized by a wet-mixing method. And the thermochemical energy storage performance of the Al 2 O 3 /CeO 2 co-doped CaO-based material under high carbonation pressure is studied. Additionally, the influences of the doping amount of Al 2 O 3 /CeO 2 , the carbonation pressure and the temperature on the energy storage performance of the synthetic material are discussed. The main compositions of the synthetic material are CaO, Ca 12 Al 14 O 33 and CeO 2 . When 5 wt% Al 2 O 3 and 5 wt% CeO 2 are doped on CaO, the synthetic material shows the highest and most stable energy storage capacity under the carbonation pressure of 1.3 MPa during 30 cycles. The Ce 3+ ions existing on the surface of the synthetic material can create oxygen vacancies on the surface of CaO and increase the amount of surface adsorbed oxygen, which facilitates the carbonation of CaO. In addition, the synthetic material possesses strong basicity and provides a large surface area and pore volume during the multicycle energy storage. The high energy storage performance of the synthetic material is attributed to the high pressure in the carbonation process, the good support of Ca 12 Al 14 O 33 and the catalytic function of CeO 2 . The synthetic material can reduce the overall cost in concentrated solar power plants, thus it appears promising.
研究领域:
材料科学
·
可再生能源
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2024
·
IF 8.1
Qin Huang,Bingshou Gong,Habibullah,Ziyuan Wang,Yao Wang,Yigang Yan,Yungui Chen,Chaoling Wu
Hydrolysis of magnesium-based materials is a promising hydrogen source for fuel cells. Our previous work (Liu et al. 2015) proposed the 30 wt% calcium-magnesium alloy hydrides (MCH) with superior hydrolysis performance than magnesium and magnesium hydride. But the easily-happened cold-welding reduces the pulverization efficiency. Additionally, the hydrolysis conversion rate at room temperature remains low. In current work, we have explored the novel composites including MCH and 0-20 wt% expanded graphite (EG) to examine the impact and underlying mechanisms of EG as additive in mitigating cold-welding and enhancing hydrolysis. The results suggest that EG coats on the material surface as a dispersant to prevent cold-welding, optimize ball milling efficiency and reduce particle size, further facilitating hydrogenation and hydrolysis. In deionized water , MCH with 10 wt% EG (MCH-10EG) displays the best hydrolysis performance, with a low activation energy of 11.26 kJ mol −1 and a complete conversion within 8 min at 55 °C. Moreover, at room temperature, combined with the corrosion effects of Cl − and H + to break the formed magnesium hydroxide passivation layer , MCH-10EG achieves a complete conversion within only 5 min in 0.3 mol L −1 aluminum chloride solution. This work may significantly advance the large-scale production and practical application of magnesium-calcium-based hydrolysis materials as hydrogen source.
研究领域:
材料科学
·
氢能技术
✓ 已验证
DOI
高影响因子
Journal of Materials Research and Technology-JMR&T
·
2021
·
IF 5.039
Dongping Song,Tao Huang,Qing Fang,Ao Liu,Yi-Fan Gu,Yu-Qing Liu,Long-Fei Liu,Shu-Wen Zhang
The potentiality on alkali activation of volcanic tuff with calcium-based materials, fly ash, and their mixtures as additives were comprehensively investigated in this study. Several characterization strategies have been employed for mechanism exploration. CaO and fly ash (FA) brought about more dramatic responses than CaSO 4 and alkaline activator on activating the volcanic tuff-based geopolymer, which was relatively stable under the wet-dry alternated conditions. The symmetrical stretching vibration of Si–O–T (T = Al or Si) was right-shifted to the band at approximately 1036 cm −1 , implying the incorporation of Ca into Si–O–T. FA accompanying with CaO enhanced the polycondensation, gelation, and hardening of geopolymer. However, too many quartz balls brought into geopolymer paste by an excessive amount of fly ash deteriorated the cementing quality and reduced the mechanical strengths. This work contributes to the module usage of volcanic tuff in the construction industries and supplies an innovative method in activating geopolymerization.
研究领域:
土木工程
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Jingrui Liu,Yimin Xuan,Liang Teng,Qibin Zhu,Xianglei Liu,Yulong Ding
The calcium-based thermochemical energy storage is one of the most promising technologies in the field of solar energy utilization and energy storage. However, the pore-scale spectral absorption and heat and mass transfer processes of calcium-based particles in thermochemical energy storage remain unclear. In this work, the spectral absorption, flow heat transfer and chemical reaction coupling processes are investigated from the perspective of a single modified calcium-based particle. Among them, the spectral absorption properties are studied by Finite-Difference Time-Domain method and Monte Carlo ray tracing method, respectively. At the same time, the flow heat transfer and chemical reaction inside the particles are predicted based on the lattice Boltzmann method. The conversion and storage from solar to chemical energy are realized by simulations and experiments. The results show that the structure and morphology, particle size and solar irradiation flux are the main factors affecting the calcination of single particle calcium carbonate. This method reveals the intrinsic relationship between microscopic spectral absorption and thermal mass transport of single particle, and provides a theoretical basis for the co-design and optimization of photothermal systems at the particle scale.
研究领域:
能源科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Yi Shi,Jian Sun,Yun Long,Ruilin Wang,Zijian Zhou,Long Jiang,Chuanwen Zhao
Calcium Looping (CaL) is a noteworthy high-temperature thermochemical energy storage technology applied in the Concentrated Solar Power (CSP), given its considerable theoretical heat storage density and the low-cost raw materials. The inherent poor solar absorptance to CaO-based materials, however, limit their use in volumetric collectors that operate in direct solar-driven heat storage mode. This research implements a collaborative strategy of external Mn-doping and internal Al-loading to fabricate CaO-based composite pellets using a hydrophobic-assisted casting method. The fabricated pellets, featuring a “black exterior, white interior” design, achieve both good light absorption and stable heat storage/release capabilities. The findings reveal that incorporating a hydrophobic layer with 60 wt% MnO 2 is advantageous for preserving the structural integrity of the Mn-based outer shell and for the elevation of its optical absorption capability. Therefore, the solar absorbance of the proposed Al-stabilized CaO-based composite pellets with a dark Mn-based shell is 86.39 %, and their compressive strength is 9.38 MPa, which is notably higher than the shell-free pure CaO-based pellets (19.36 %, 0.6 MPa). Moreover, after 40 cycles, the energy storage density of the preferred CaO-based composite pellets has increased by 44.3 % compared to the initial cycle, achieving 1.07 MJ/kg. The desirable “self-reactivation” phenomenon is primarily attributed to the synergistic co-evolution of the outward soft skeleton and the inward hard skeleton within the CaO-based composite pellets, which helps maintain a stable pore structure and accelerates the carbonation rate during high-temperature cycles.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Yuqi Zhang,Di Zhang,Pengwei Lei,Ziyan Yang,Zhikun Zhang
Metal-organic frameworks (MOFs) are a promising material for CO 2 adsorption because of their great specific surface area, well-ordered porous structures ordered porous structure and various means available for functionalization. In this work, the calcium squarate (UTSA-280) was synthesized from carbide slag without pretreatment at room temperature by a rapid mechanochemical method, and then was further functionalized with tetraethylenepentamine (TEPA) to prepare CO 2 adsorbents. The effects of water content, ball milling frequency, adsorption temperature, and TEPA loading on CO 2 adsorption performance of various adsorbents were investigated. The results showed that the CO 2 adsorption of the synthesized MOFs increased firstly and then decreased with increasing water content and ball milling frequency. The synthesized MOFs with water content of 300 mmol and ball milling frequency of 15 HZ exhibited the best crystallinity. The addition of TEPA provided additional adsorption sites and led to the increase of CO 2 adsorption capacity. The UTSA-280–300-15-40TEPA demonstrated the highest CO 2 adsorption capacity (2.89 mmol/g) at 25 °C. The CO 2 adsorption kinetics analysis showed that the Avrami model fitted well with the experimental results. Furthermore, the UTSA-280–300-15-40TEPA exhibited excellent chemical stability during the adsorption–desorption cycles, with only a 14.53 % decrease in adsorption capacity after 10 cycles. This work demonstrated the possibility of preparing UTSA-280 using carbide slag for effective CO 2 adsorption.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Science China-Technological Sciences
·
2025
·Vol. 68
·期 6
·1-17
·
IF 4.9
Guo Sijia,Tian Xikun,Yan Jun,Shang Chaolin,Zhao Changying
Thermochemical energy storage (TCES) under direct irradiation mode is a promising technology that promotes the widespread utilization of high-temperature concentrated solar energy. However, poor cyclic stability and solar absorption for calcium carbonates, high cost for cobalt oxides, and safety issues for powder-form materials hinder the practical applications of the TCES systems. This work innovatively proposed a compressed reactive TCES unit composed of 10%-volume of modified Co 3 O 4 in the center and 90%-volume of modified CaCO 3 around the center. The modified calcium-based compacted material (CaCO 3 M-p) exhibits 20.5°C lower onset temperature, 13.9 kJ mol −1 lower activation energy, and faster kinetics than the commercial CaCO 3 powder (CaCO 3 -u) in the energy storage process. Both the cyclic stability in 15 cycles and solar absorption of the CaCO 3 M-p are boosted, which are 1.25 times and 18.3 times those of the CaCO 3 -u, respectively. While compaction reduces the reactive performances by narrowing the porous, the Mn/Mg co-modification has a more significant effect in increasing the above properties by creating lattice defects and introducing impurities. The modified cobalt-based compacted material (Co 3 O 4 M2-p) presents similar reactive and optical properties as raw Co 3 O 4 powder, yet it elevates the average conversion rate in 30 cycles to 1.75 times that of compressed raw Co 3 O 4 . Modification by microcrystalline cellulose is the key to this improvement, as it reduces activation energy and promotes decomposition kinetics for compacted Co-based materials. The compressed reactive TCES unit demonstrates outstanding energy storage density and power. The 10%-volume Co 3 O 4 improves external radiation absorption and reinforces internal heat transfer, enhancing the unit’s energy storage rate. Moreover, Co 3 O 4 also contributes to energy density, raising the total density to 0.4217 MWh m −3 , exceeding the 0.2468 MWh m −3 limit of CaCO 3 powder. The compacted materials and composite unit advance the practical use of TCES in solar energy storage.
研究领域:
材料科学
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
ACS Omega
·
2022
·
IF 4.132
Yun Da,Jialei Zhou
Direct solar-driven thermochemical energy storage system puts forward new requirements for calcium-based materials with high optical absorption, high capacity of energy storage density, high cycling stability, and low costs. In this work, the novelty relies on the fact that calcium-based composites modified by transition metal elements can directly capture solar energy for storing. Meanwhile, this work provides the design criteria of calcium-based materials with high optical absorption in theory and screens appropriate decorating elements to modify CaCO3 for satisfying multiple demands in experiments. The design criteria for promoting light absorption of calcium-based materials were established by electromagnetic theory while the dark transition metal elements (Cr, Mn, Fe, Co, Ni, and Cu) were doped in binary combination to experimentally modify calcium-based composites through the sol–gel method. The results indicate that calcium-based materials with porous structure (doped with Mn element) not only have high optical absorption (>75%) but also possess high cycling stability (attenuation <9% after 20 cycles) and high capacity of energy storage density (>1260 kJ/kg). After comprehensive consideration of optical absorption, cycling stability, capacity of energy storage density, and economic cost, the samples of Ca–Mn–Fe = 100–2–4 and Ca–Cr–Mn = 100–2–4 stand out to be the most promising candidates for large-scale application of thermochemical energy storage. This work provides novel promising calcium-based materials for direct solar-driven thermochemical energy storage system to realize high-efficiency solar thermal conversion.
研究领域:
材料科学
·
能源工程
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2025
·
IF 13.2
Shuangchun Jiang,He Tao,Yingjuan Shao,Yao Fu,Wenqi Zhong
The pressurization can significantly enhance the thermochemical energy storage performance of Ca-based materials. In this study, detailed experimental investigations were conducted in both fixed bed and fluidized bed on the performance of TiO 2 modified Ca-based materials ranged from 700 °C to 900 °C under pressurized conditions (0.1 MPa to 0.8 MPa) from powder to pellet, including the influence of inert dopants on the properties of CaO powder, the optimization of biomass pore-former agents' selection and the enhancement of pressurized fluidization states on the performance of pelletized materials. The findings indicated that the pressure intensity has a positive correlation with the energy storage density and cyclic stability of TiO 2 modified Ca-based materials. The results demonstrated that the properties of CaO powder intensified with the pressure and the energy storage density was increased by 31.4 % with 5 % TiO 2 doped at 0.8 MPa. And the energy storage performance of the pelletized CaO-5TiO 2 with 10 % bagasse added was also significantly improved at a higher-pressure condition. The energy storage performance of the determined 10B-CaO-5TiO 2 pellet under fluidization conditions at 0.8 MPa was 38.9 % higher than that of atmospheric pressure after 10 cycles. As the carbonation pressure increased, the average grain size of CaO exhibited a decline of 7.0 %, a slighter sintering and deeper reaction region were observed into the determined pellet. Furthermore, the specific surface area and pore volumes of the 10B-CaO-5TiO 2 pellets under high carbonation pressure were 382.8 % and 460.0 % higher than that of atmospheric pressure in the fluidized bed, respectively.
研究领域:
材料科学
·
能源化学
·
化学工程
·
多相催化
·
储能技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Huajing Zhang,Chao Xu,Xiangyu Sun,Bowen Xu,Zhirong Liao,Huawei Liu
Ca-based materials are considered to be promising energy storage materials for the 3rd generation concentrated solar power (CSP) plants due to their high energy storage density , high operating temperature , and low energy loss . However, the poor cyclic stability, low solar absorption capability, and slow reaction kinetics of conventional Ca-based materials seriously limit large-scale applications. Here, we successfully synthesized a Zr-Mn co-doped CaO-based composite, achieving good cyclic stability, enhanced solar absorption capability, and fast carbonation reaction kinetics simultaneously. The energy storage performance of 20Ca-0.5Zr-0.5Mn was evaluated at a high carbonation reaction temperature of 850 °C. Results showed that the performance decay of 20Ca-0.5Zr-0.5Mn was only 10.11 % over 30 cycles. By co-doping Zr and Mn elements, the carbonation reaction kinetics of CaO-based composites were promoted because of increased basicity and oxygen vacancies . Compared with pure CaO, the average solar absorptance of 20Ca-0.5Zr-0.5Mn was enhanced by about 376 %. Therefore, the proposed Zr-Mn co-doped CaO-based composite indicates the bright applied prospect in CSP plants for solar energy storage .
研究领域:
能源材料
·
太阳能技术
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2022
·
IF 7.305
Yun Da,Jialei Zhou
Calcium-looping thermochemical energy storage is a promising candidate in concentrated solar power plants. Solar-driven calcium-looping process via directly capturing sunlight can solve the challenges faced by traditional calcium-looping system, such as excessively high wall temperature, large thermal resistance , and low utilization efficiency of solar energy. In this work, we aim to improve optical absorption and cyclic stability of the direct solar-driven calcium-looping process with modified calcium-based materials for thermochemical energy storage. A simple sol-gel method was used to synthesize calcium-based composites via multi-doping strategy and the doping elements mainly included cerium (Ce), cobalt (Co), and manganese (Mn). Firstly, the role of calcium-based materials using single-doping element on the performance of thermochemical energy storage was revealed. The doping of Ce alone could generate oxygen vacancies and increase the adsorbed ability of CO 2 , accelerating the carbonization kinetics of CaO. The doping of Co alone played an important role in enhancing optical absorption while the doping of Mn alone was beneficial to cycling stability via providing a strong framework to inhibit sintering effect. Calcium-based materials using multi-doping strategy retained the function of single-doping effect on the performance of calcium-looping thermochemical energy storage, synergistically improving optical absorption, carbonization kinetics, and cyclic stability. Compared to pure CaCO 3 , Ce/Co/Mn co-doped Ca-based materials (CaCO 3 /5Ce–3Co–6Mn) exhibited a higher light trapping ability with optical absorption reached to 83.26% and more excellent cycling stability with effective conversion rate remained above 64% after 20 cycles. Furthermore, an interesting phenomenon that phase transformation of doped metal oxides formed by multi-doping strategy occurred during the calcination/carbonation cycling process was discovered and the underlying mechanisms were clarified. Finally, the feasibility of experiment by directly capturing concentrated sunlight to drive CaCO 3 decomposition for storing solar energy was verified.
研究领域:
材料科学
·
能量存储
·
太阳能
·
热化学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）