New materials for adsorption heat transformation and storage

Abstract

Great current progress in the materials science offers an enormous choice of novel adsorbents which may be promising for transformation and storage of low temperature heat, e.g. from renewable heat sources. This paper gives an overview of recent trends and achievements in this field. We consider possible optimization of zeolites by dealumination, further development on aluminophosphates, composites salt in porous host matrice and metal-organic frameworks which are currently receiving the largest share of scientific attention. The particular attention is focused on the chemical nano-tailoring and tunable adsorption behavior of these materials to satisfy the demands of appropriate heat transformation cycles. We hope that this review will give new impact on target-oriented research on the novel adsorbents for heat transformation and storage

Synthesis Optimization, Shaping, and Heat Reallocation Evaluation of the Hydrophilic Metal–Organic Framework MIL‐160(Al)

“…The results showed that the microporoush ydrophilic Al-dicarboxylate MIL-160(Al) exhibited one of the best performances. [5] For example, silica gel can be regenerated at very low temperature (< 45-50 8C), but its low water-sorption capacity resultsi np oor loading lift (0.03-0.10 gg À1 )w ithin at ypical adsorption heatp ump (AHP) cycle. This led to the production of MIL-160(Al) on a4 00 gs cale, before the material was shaped into pelletst hrough aw et-granulation method.…”

“…10 times less) than those that are required for the same application using sensible heat storage. [5,16] In this study,w ef irst considered as eries of water-stable, porousM OFs based on high-valencem etal cations (Al 3 + ,F e 3 + , Cr 3 + ,T i 4 + ,Z r 4 + )a nd polycarboxylate aromatic linkers for use in heat reallocation by evaluating their water cycling loading lifts (the amount of water exchanged between the adsorption and desorption steps of the entire cycle in fixed conditions of T and p)a nd their energy-storage capacities (the amount of energy stored by materialp er unit of mass). [2][3][4] In addition to as uitable stabilitya fter numerous workingc ycles, the major requirements for energy-storage materials are ah igh adsorption uptake at relatively low relative pressure and regeneration under mild temperature conditions (desorption within the 80-100 8Cr ange).…”

“…[2][3][4] In addition to as uitable stabilitya fter numerous workingc ycles, the major requirements for energy-storage materials are ah igh adsorption uptake at relatively low relative pressure and regeneration under mild temperature conditions (desorption within the 80-100 8Cr ange). [5] For example, silica gel can be regenerated at very low temperature (< 45-50 8C), but its low water-sorption capacity resultsi np oor loading lift (0.03-0.10 gg À1 )w ithin at ypical adsorption heatp ump (AHP) cycle. [6][7][8][9] In contrast, the high water affinity of cationic zeolites typicallyy ields large sorptionu ptakes at low relative pressures, although with an energy-demanding regeneration (> 140 8C).…”

“…[3,[12][13][14][15] All these features maket hem promising candidates for heat reallocation based on water adsorption. [5,16] In this study,w ef irst considered as eries of water-stable, porousM OFs based on high-valencem etal cations (Al 3 + ,F e 3 + , Cr 3 + ,T i 4 + ,Z r 4 + )a nd polycarboxylate aromatic linkers for use in heat reallocation by evaluating their water cycling loading lifts (the amount of water exchanged between the adsorption and desorption steps of the entire cycle in fixed conditions of T and p)a nd their energy-storage capacities (the amount of energy stored by materialp er unit of mass). Next, one MOF that performed well was selected as acandidate for alaboratory pilot setup to evaluate its seasonal heat-reallocation properties.…”

Manufacturing and Assessment of Electrospun PVP/TEOS Microfibres for Adsorptive Heat Transformers

“…A coating has several advantages compared to the loose powder because the interface contact is improved and the quantity of porous material needed is optimized as well as the mechanical and thermal stability of the adsorber module [27,28]. Several different solutions have been proposed, like the direct synthesis of the adsorbing material on the heat exchanger surfaces [29,30] or the use of binders and ligands to make coatings [23,31] or the use of metallic or polymeric fibres or foams [32][33][34][35]. Each of these solutions, however, has many restrictions due to the scale up to an industrial level maintaining competitive production costs.…”