Fabrication of heat storage pellets composed of microencapsulated phase change material for high-temperature applications

Sakai, Hiroki; Sheng, Nan; Kurniawan, Ade; Akiyama, Tomohiro; Nomura, Takahiro

doi:10.1016/j.apenergy.2020.114673

Cited by 44 publications

(18 citation statements)

References 42 publications

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“…It has been reported that water, molten salts, and concrete can be used as energy sources when the sensible heat storage technique is used to address the energy problems and mannitol and microcapsulated phase change materials (PCMs) can be used as energy sources when the latent heat storage technique is used to meet the energy demand. [1][2][3][4][5][6][7] The heat storage density and longterm heat storage capacity achieved using the CHS technique was better than the heat storage density and long-term heat storage capacity achieved using the other two techniques. [8][9][10][11][12][13] Therefore, in our previous studies, the CHS technique has received attention for energy conservation.…”

Section: Introductionmentioning

confidence: 84%

Fourier-transform infrared and X-ray diffraction analyses of the hydration reaction of pure magnesium oxide and chemically modified magnesium oxide

2021

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Section: Introductionmentioning

confidence: 84%

Fourier-transform infrared and X-ray diffraction analyses of the hydration reaction of pure magnesium oxide and chemically modified magnesium oxide

2021

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“…However, there few disadvantages associated with their utilization. Some of the advantages, disadvantages and application of densification and densification products are presented in Table 3 (Pimchuai et al 2010 ; Tumuluru et al 2011 ; Mopoung and Udeye 2017 ; Oladeji 2015 ; Thulu et al 2016 ; Alhassan and Olaoye 2015 ; Grover and Mishra 1996a , b ; Djatkov et al 2018 ; Ahmed et al 2008 ; Kaliyan and Morey 2009 ; Ilochi 2010 ; Deshannavar et al 2018 ; Adu-gyam et al 2019 ; Yusuf et al 2021 ; Sakai et al 2020 ; Mu et al 2020 ; Lu et al 2021 ; Singh et al 2021 ; Shigehisa et al 2014 ; Wang et al 2014 ; Yank et al 2016 ; Lubwama and Yiga 2017 ). Other treatments such as thermal treatment (torrefaction, carbonization, pyrolysis, and gasification) and biological treatment (anaerobic digestion) are also utilized for different applications.…”

Section: Advantages Disadvantages and Application Of Densification And Its Productsmentioning

confidence: 99%

Densification of agro-residues for sustainable energy generation: an overview

Ibitoye

Jen

Mahamood

et al. 2021

Bioresour. Bioprocess.

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The global demand for sustainable energy is increasing due to urbanization, industrialization, population, and developmental growth. Transforming the large quantities of biomass resources such as agro-residues/wastes could raise the energy supply and promote energy mix. Residues of biomass instituted in the rural and industrial centers are enormous, and poor management of these residues results in several indescribable environmental threats. The energy potential of these residues can provide job opportunities and income for nations. The generation and utilization of dissimilar biomass as feedstock for energy production via densification could advance the diversity of energy crops. An increase in renewable and clean energy demand will likely increase the request for biomass residues for renewable energy generation via densification. This will reduce the environmental challenges associated with burning and dumping of these residues in an open field. Densification is the process of compacting particles together through the application of pressure to form solid fuels. Marketable densification is usually carried out using conventional pressure-driven processes such as extrusion, screw press, piston type, hydraulic piston press, roller press, and pallet press (ring and flat die). Based on compaction, densification methods can be categorized into high-pressure, medium-pressure, and low-pressure compactions. The common densification processes are briquetting, pelletizing, bailing, and cubing. They manufacture solid fuel with desirable fuel characteristics—physical, mechanical, chemical, thermal, and combustion characteristics. Fuel briquettes and pellets have numerous advantages and applications both in domestic and industrial settings. However, for biomass to be rationally and efficiently utilized as solid fuel, it must be characterized to determine its fuel properties. Herein, an overview of the densification of biomass residues as a source of sustainable energy is presented.

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“…Consequently, heat storage techniques have gained increasing attention, and the main heat storage techniques nowadays are sensible, latent, and chemical heat storage (CHS) techniques. Water, molten salts, basalt, and concrete have been reported as sensible heat storage materials, whereas mannitol, paraffin, fatty acids, polyethylene glycol, and microcapsule phase-change materials have been used as latent heat storage materials. − In addition, the heat storage density and long-term heat storage parameters for the CHS technique are typically better than those for the other two techniques. − Therefore, in our previous studies, we focused on the CHS technique, owing to its energy conservation potential.…”

Section: Introductionmentioning

confidence: 99%

Fourier-Transform Infrared Analysis of the Dehydration Mechanism of Mg(OH)₂ and Chemically Modified Mg(OH)₂

2021

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Mg(OH) 2 is a medium-temperature chemical heat storage material. The addition of LiCl and/or LiOH to Mg(OH) 2 has been reported to promote the dehydration of Mg(OH) 2 . However, the mechanism underlying the effect of the addition of Li compounds on the dehydration of Mg(OH) 2 has not yet been elucidated. This study focused on the dehydration of pure Mg(OH) 2 and Mg(OH) 2 with added LiCl and/or LiOH. We analyzed the role of the Li compounds in the dehydration of Mg(OH) 2 using X-ray diffraction and Fourier-transform infrared (FT-IR) spectroscopy. Our FT-IR measurements assigned the peaks of the bulk OH groups of Mg(OH) 2 , which are not referred to in previous studies. FT-IR measurements revealed that the surface state of Mg(OH) 2 with added LiOH with a Mg(OH) 2 :LiOH mole rate of 100:20 was similar to that of MgO. This indicated that the addition of LiOH to Mg(OH) 2 affected the dehydration of the Mg(OH) 2 surface. Moreover, we confirmed that LiCl affected the dehydration of the bulk Mg(OH) 2 phase. Using these results, we proposed possible mechanisms for the effects of the addition of LiCl and/or LiOH on the dehydration of Mg(OH) 2 . Lastly, we discuss the reason for the Li compounds promoting the dehydration of Mg(OH) 2 .

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Fabrication of heat storage pellets composed of microencapsulated phase change material for high-temperature applications

Cited by 44 publications

References 42 publications

Fourier-transform infrared and X-ray diffraction analyses of the hydration reaction of pure magnesium oxide and chemically modified magnesium oxide

Fourier-transform infrared and X-ray diffraction analyses of the hydration reaction of pure magnesium oxide and chemically modified magnesium oxide

Densification of agro-residues for sustainable energy generation: an overview

Fourier-Transform Infrared Analysis of the Dehydration Mechanism of Mg(OH)₂ and Chemically Modified Mg(OH)₂

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Fabrication of heat storage pellets composed of microencapsulated phase change material for high-temperature applications

Cited by 44 publications

References 42 publications

Fourier-transform infrared and X-ray diffraction analyses of the hydration reaction of pure magnesium oxide and chemically modified magnesium oxide

Fourier-transform infrared and X-ray diffraction analyses of the hydration reaction of pure magnesium oxide and chemically modified magnesium oxide

Densification of agro-residues for sustainable energy generation: an overview

Fourier-Transform Infrared Analysis of the Dehydration Mechanism of Mg(OH)2 and Chemically Modified Mg(OH)2

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Product

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Fourier-Transform Infrared Analysis of the Dehydration Mechanism of Mg(OH)₂ and Chemically Modified Mg(OH)₂