Sludge-incinerated ash based shape-stable phase change composites for heavy metal fixation and building thermal energy storage

Xiong, Yaxuan; SONG, Chaoyu; REN, Jing; JIN, Yuhe; Binjian, Nie; Xu, Qian; Wu, Yuting; Li, Chuan; Li, Haimeng; Ding, Yulong

doi:10.1016/j.psep.2022.04.004

Cited by 29 publications

(9 citation statements)

References 29 publications

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“…A laser flasher (LFA 467, NETSCH) was performed to obtain the thermal diffusivity of the base salt and molten salt nanofluids using high-purity nitrogen (99.999%) as protective gas and purge gas, and the thermal conductivity of sample was calculated according to the formula in the literature [27]. Each temperature point was measured seven times, and platinum-rhodium crucibles were used for the tests.…”

Section: Characterization Methods and Uncertainty Analysismentioning

confidence: 99%

“…Thermal conductivity of samples has a decisive influence on heat conduction and convective heat transfer in TES devices, and an improvement in thermal conductivity significantly enhances the heat transfer performance. The thermal conductivity of samples in this work was calculated according to the equations in the literature [27]. The average measured thermal diffusivity of binary carbonate salt is 0.217 mm 2 /s.…”

Section: Thermal Conductivitymentioning

confidence: 99%

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Insights into the Enhancement Mechanisms of Molten Salt Nanofluids

Xiong

Huixiang

Wang

et al. 2022

International Journal of Photoenergy

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The addition of nanomaterials to molten salts can significantly improve their thermal performance. To explore the enhancement mechanisms, this work prepared carbonate salt nanofluids with binary carbonate as base salt and 20 nm SiO2 and 20 nm MgO nanoparticles as additives by the commonly used aqueous solution method. Then, the key performance and micromorphology of the carbonate salt nanofluids are characterized by differential scanning calorimetry, thermal gravimetric analysis, laser flash analysis, and micromorphology analysis. Results showed that the 20 nm SiO2 nanomaterials instead of the 20 nm MgO nanomaterials exerted higher effects on latent heat while the 20 nm MgO nanomaterials instead of the 20 nm SiO2 nanomaterials exerted higher effects on the sensible heat, thermal conductivity, and high-temperature stability of carbonated salt. In addition, different nanostructures were observed in SiO2-based and MgO-based molten salt nanofluids, respectively. Innovatively, formation mechanisms of molten salt nanofluids were proposed based on cloud nuclei to explain the different enhancements in this work.

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Section: Characterization Methods and Uncertainty Analysismentioning

confidence: 99%

Section: Thermal Conductivitymentioning

confidence: 99%

Insights into the Enhancement Mechanisms of Molten Salt Nanofluids

Xiong

Huixiang

Wang

et al. 2022

International Journal of Photoenergy

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“…[101] When the thermal conductivity of the recyclable supporting materials was lower than that of PCMs, it would make a certain decrease in the thermal conductivity of the form-stable PCMs. For instance, Xiong et al [38] used industrial waste sludge incorporated ash (SIA) as a skeleton and NaNO 3 as PCMs to prepare the form-stable PCMs. The thermal conductivity of the form-stable PCMs was 0.493 W/m•K when the PCM's mass fraction was 50%.…”

Section: Thermal Conductivitymentioning

confidence: 99%

“…[33] Additionally, fly ash, [34] slag, [34] heavy oil ash [35] and other inorganic industrial waste also be used as skeletons in the preparation of form-stable PCMs. [36][37][38] Organic industrial waste (such as waste plastics [39] and rubbers) [40] with the characteristics of porous, and high ductility are also available to regenerate for the skeletons of formstable PCMs. The use of industrial by-products skeletons enables the reuse of waste materials, which makes sense for reducing the harm to the environment.…”

Section: Introductionmentioning

confidence: 99%

Recent advances in energy storage and applications of form‐stable phase change materials with recyclable skeleton

Jia,

Jiang,

Pan

et al. 2024

Carbon Neutralization

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With the expansion of the global population, the energy shortage is becoming increasingly acute. Phase change materials (PCMs) are considered green and efficient mediums for thermal energy storage, but the leakage problem caused by volume instability during phase change limits their application. Encapsulating PCMs with supporting materials can effectively avoid leakage, but most supporting materials are expensive and consume huge of natural resources. Carbon materials, which are rich and renewable resources, can be used as economical and environmentally friendly supporting skeletons to prepare form‐stable PCMs. Although many researchers have begun to use recyclable materials especially various derivatives of carbon as supporting skeletons to prepare form‐stable PCMs, the preparation methods, thermophysical properties and applications of form‐stable PCMs with recyclable skeletons have rarely been systematically summarized yet. Form‐stable PCMs with a recyclable skeleton can be used as green and efficient thermal storage materials due to their high heat storage capacity and good thermophysical stability after 2000 thermal cycles. This review investigates the effects of recyclable skeletons on the thermophysical properties including phase change temperature, latent heat, thermal conductivity, supercooling, and thermal cycling reliability. Four major kinds of recyclable skeletons are focused on: biomass, biochar, industrial by‐products as well as waste incineration ash. Additionally, the application scales of form‐stable PCMs with recyclable skeletons are explicated in depth. Moreover, the main challenges confronted by form‐stable PCMs with recyclable skeletons are discussed, and future research trends are proposed. This article provides a systematic review of the form‐stable PCMs with recyclable skeletons, giving significant guidance for further reducing carbon emissions and promoting the development of sustainable energy.

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“…Moreover, Li et al [63] extracted the humic acid from SS and applied it to supercapacitor material, and the results illustrate that the biogas energy can be efficiently recovered. Studies show that SS and RM can be used for TES, which can reduce environmental pollution and help to realize the recycling of resources [61][62][63]. The reuse of industrial solid waste in the TES process not only reduces dependence on virgin resources but also reduces the cost of waste disposal, which helps to promote sustainable development and environmental protection [64].…”

Section: Introductionmentioning

confidence: 99%

A Mini Review on Sewage Sludge and Red Mud Recycling for Thermal Energy Storage

Xiong,

Zhang,

Zhao

et al. 2024

Energies

Self Cite

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Sewage sludge and red mud, as common industrial waste, have become a research hotspot in the field of achieving carbon peaking and carbon neutrality, reducing carbon emissions, and solving environmental problems. However, their treatment and disposal have always been a difficult problem in the environmental field. Utilizing these two materials for thermal energy storage can not only improve energy utilization efficiency but also further reduce carbon emissions during their treatment process, providing a new approach for sustainable development in the industrial sector. This article summarizes the research progress for the resource recovery of sewage sludge and red mud for direct thermal energy recovery and composite phase change energy storage. After proper treatment, sludge and red mud can be directly used as energy storage materials. In addition, sludge and red mud can be combined with phase change materials to prepare composite materials with an excellent energy storage performance. This composite has broad application prospects in fields such as solar energy utilization and building energy efficiency. However, there are still some challenges and issues in this resource recovery and utilization, such as potential environmental pollution during the treatment process, the long-term stability of energy storage materials, and cost-effectiveness, which require further research and resolution. The purpose of this paper is to evaluate the potential of sewage sludge and red mud as energy storage materials, to explore their feasibility and advantages in practical applications, and to reveal the research progress, technical challenges, and future development directions of these two materials in the field of thermal energy storage.

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Sludge-incinerated ash based shape-stable phase change composites for heavy metal fixation and building thermal energy storage

Cited by 29 publications

References 29 publications

Insights into the Enhancement Mechanisms of Molten Salt Nanofluids

Insights into the Enhancement Mechanisms of Molten Salt Nanofluids

Recent advances in energy storage and applications of form‐stable phase change materials with recyclable skeleton

A Mini Review on Sewage Sludge and Red Mud Recycling for Thermal Energy Storage

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