Development and characterization of silica gel–LiCl composite sorbents for thermal energy storage

Ye, Nan; Wang, R.Z.; Lu, Zhenneng; Wang, L.W.

doi:10.1016/j.ces.2014.02.012

Cited by 129 publications

(37 citation statements)

References 32 publications

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“…The most frequently used matrix is silica gel due to its high hydrophilic properties. In our previous work [21], mesoporous silica gel with an average pore diameter of 8-10 nm was applied to confine LiCl. The composite was prepared by directly impregnating dried silica gel particles in LiCl solutions.…”

Section: Choice Of Host Matricesmentioning

confidence: 99%

“…Since Aristov et al [14][15][16] first introduced the concept of selective water sorbents, numerous combinations of salts with porous matrices have been raised up, such as silica gel-CaCl 2 [17][18][19], silica gel-LiCl [20,21], zeolite 13X-CaCl 2 [22], zeolite 13X-MgSO 4 [23], wakkanai siliceous shale (WSS)-CaCl 2 [24]. In terms of the porous matrix, adding of hygroscopic salts greatly increase the water uptake quantities; in terms of the salts, dispersing of the salt particles in porous matrix could improve the sorption kinetics.…”

Section: Introductionmentioning

confidence: 99%

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Study on consolidated composite sorbents impregnated with LiCl for thermal energy storage

Wang

et al. 2015

International Journal of Heat and Mass Transfer

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Section: Choice Of Host Matricesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Study on consolidated composite sorbents impregnated with LiCl for thermal energy storage

Wang

et al. 2015

International Journal of Heat and Mass Transfer

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“…For water/CaCl2silica gel system (Aristov et al, 1996a(Aristov et al, , 1996b and ammonia/BaCl2γ-alumina system , metal salts confined into solid host matrices had sorption characteristics different from bulk ones. Some researchers reported that the sorption isotherms or isobars for metal salt composites had not stepwise shapes but linear shapes when metal salts were deposited in pores smaller than 15 nm (Gordeeva et al, 2002;Simonova et al, 2009;Tokarev et al, 2010;Yu et al, 2014). Furthermore, Gordeeva et al (2005) observed the formation of amorphous calcium chloride in pores of nanoporous silica gel when the composite was prepared through calcination at a relativelyhigh temperature after solution impregnation.…”

Section: Introductionmentioning

confidence: 99%

Water Vapor Sorption Characteristics of Calcium Chloride-Anodized Alumina Composites

Suwa

Kumita

Noki

et al. 2016

J. Chem. Eng. Japan / JCEJ

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In this study, calcium chlorideanodized alumina composites were examined for water vapor sorption properties. Porous alumina host matrices for calcium chloride impregnation were prepared by anodizing aluminum plates in an oxalic acid bath or a sulfuric acid bath. CaCl2alumina composites were obtained through calcination of the anodic alumina film impregnated with CaCl2 solution at 473 or 773 K. XRD analyses indicated that the type of host matrix and the calcination temperature made an effect on crystal states of calcium chloride in the composite layer. The composite calcined at 473 K, of which host matrix was oxalic-acid anodized alumina film, contained calcium chloride anhydrate crystals. Water vapor sorption experiments showed that the composite with crystalline calcium chloride sorbed well water vapor, and its sorption isotherm had a shape similar to that of bulk CaCl2. Therefore, the water sorption behavior of the CaCl2alumina composite strongly depends on crystal states of calcium chloride in anodized alumina layer. IntroductionMetal salts such as calcium chloride, lithium chloride and calcium nitride have a high hygroscopic nature, and their sorption capacities of water vapor are larger than that of silica gel or zeolite. Water vapor sorption on metal salt contains a gas-solid reaction related to the formation of hydrates. According to the Gibbs's phase rule, the reaction between solid metal salt and water vapor is a monovariant system, that is, the sorption equilibrium can be determined by either the vapor pressure or the sorption temperature (Aristov, 2007). This property is desirable as working pair for sorption chillers. Many researchers have proposed to immobilize metal salts in porous materials such as silica gel (Aristov et al., 1996a), alumina (Sharonov and and expanded graphite (Fujioka et al., 2008) to ensure easy handling of the metal-salt particles and/or to enhance the heat and mass transfer rates in solid-sorbent beds.Aluminum is one of the most suitable materials for heat exchangers because of the high thermal conductance. If aluminum plates have the hygroscopic properties, they will be very attractive sorption materials that can be rapidly cooled and heated. In order to meet this requirement, we prepared aluminum plates with porous thin aluminum oxide films on both sides by anodizing in acidic baths, and then calcium chloride was deposited into pores of the films by a solution impregnation method in the previous works (Kumita

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“…, aluminophosphate molecular sieves [8], lithium chloride [9], lithium bromide [10], calcium chloride [11], and metal-organic frameworks [12] have been used intrinsically for this purpose. However, the conventional desiccants have several limitations.…”

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confidence: 99%

Bundled-firewood like AlOOH-CaCl 2 nanocomposite desiccant

Rajamani

Mishra

Maliyekkal

2017

Chemical Engineering Journal

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Development and characterization of silica gel–LiCl composite sorbents for thermal energy storage

Cited by 129 publications

References 32 publications

Study on consolidated composite sorbents impregnated with LiCl for thermal energy storage

Study on consolidated composite sorbents impregnated with LiCl for thermal energy storage

Water Vapor Sorption Characteristics of Calcium Chloride-Anodized Alumina Composites

Bundled-firewood like AlOOH-CaCl 2 nanocomposite desiccant

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