Closed Sorption Heat Storage based on Aqueous Sodium Hydroxide

Fumey, Benjamin; Weber, Robert; Gantenbein, Paul; Daguenet-Frick, Xavier; Williamson, Tommy; Dorer, Viktor

doi:10.1016/j.egypro.2014.02.039

Cited by 30 publications

(16 citation statements)

References 2 publications

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“…To determine the Si/Al ratio, solid-state magic angle spinning (MAS) NMR spectra were acquired on a Avance DSX400 Bruker spectrometer operating at 99.34, 130.29 and 132.26 MHz, respectively, for 29 Si, 27 Al and 23 Na nuclei. Samples were spun at 10 for 29 Si and 12 kHz for 27 Al, and 23 Na nuclei, at the magic angle in a double-bearing 4-mm probe head.…”

Section: Heats Of Water Vapor Adsorption On Various Nanoporous Molecumentioning

confidence: 99%

“…Samples were spun at 10 for 29 Si and 12 kHz for 27 Al, and 23 Na nuclei, at the magic angle in a double-bearing 4-mm probe head. The pulse lengths were, respectively, 4 μs for 29 Si, and 0.6 μs for 27 Al and 23 Na. The recycle delays were 120 s for 29 Si, and 1 s for 27 Al and 23 Na nuclei.…”

Section: Heats Of Water Vapor Adsorption On Various Nanoporous Molecumentioning

confidence: 99%

“…The pulse lengths were, respectively, 4 μs for 29 Si, and 0.6 μs for 27 Al and 23 Na. The recycle delays were 120 s for 29 Si, and 1 s for 27 Al and 23 Na nuclei. 29 Si, 27 Al and 23 Na chemical shifts were referenced to Q8M8, Al(NO 3 ) 3 (1 M) and NaCl (1 M), respectively.…”

Section: Heats Of Water Vapor Adsorption On Various Nanoporous Molecumentioning

confidence: 99%

“…The recycle delays were 120 s for 29 Si, and 1 s for 27 Al and 23 Na nuclei. 29 Si, 27 Al and 23 Na chemical shifts were referenced to Q8M8, Al(NO 3 ) 3 (1 M) and NaCl (1 M), respectively. Thermogravimetric analysis was performed by using a thermobalance (TGA2950 from TA Instruments).…”

Section: Heats Of Water Vapor Adsorption On Various Nanoporous Molecumentioning

confidence: 99%

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Effect of NaOH addition on the thermochemical heat storage capacity of nanoporous molecular sieves

Jabbari-Hichri

Auroux

Bennici

2016

Int. J. Energy Res.

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SUMMARY The water vapor sorption capacity and corresponding generated heat amount are the most important properties for adsorbents in thermochemical heat storage systems. In order to understand the adsorption/desorption behavior of three nanoporous molecular sieves such as 5A, mordenite and natural clinoptilolite (with different structures, Si/Al ratios and balancing cations), the pure zeolites and their composites (obtained by depositing NaOH onto the molecular sieves) were characterized in their structural and surface properties by using appropriate techniques (N2 adsorption isotherms at −196 °C, XRD and (MAS) NMR). The adsorption of water was performed using a Setaram TG‐DSC 111 apparatus. Three successive cycles of hydration (at 20 °C)/dehydration (at 150 °C) were carried out to check the stability of the system in conditions close to those used in adsorption heat pumps. The measured heats of dehydration vary in the 183–614 kJ kg−1sample range for the various samples that present also different water vapor sorption capacities (from ≈ 0.08 to ≈ 0.14 kgH2O kg−1sample). The water adsorption/desorption behavior of the zeolites was mainly related to the porous structure and to the Si/Al ratio, that drive the affinity of zeolite to water. The experimental results showed that the impregnation of the three kinds of nanoporous zeolites with different amounts of sodium hydroxide negatively affects the sorption characteristics of the composites. The blockage of zeolite pores (that limits the access to water molecules), the slight amorphization of the zeolite structure and the formation of carbonates are some of the phenomena identified to influence the water sorption onto NaOH‐containing composites. Copyright © 2016 John Wiley & Sons, Ltd.

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Section: Heats Of Water Vapor Adsorption On Various Nanoporous Molecumentioning

confidence: 99%

Section: Heats Of Water Vapor Adsorption On Various Nanoporous Molecumentioning

confidence: 99%

Section: Heats Of Water Vapor Adsorption On Various Nanoporous Molecumentioning

confidence: 99%

Section: Heats Of Water Vapor Adsorption On Various Nanoporous Molecumentioning

confidence: 99%

See 2 more Smart Citations

Effect of NaOH addition on the thermochemical heat storage capacity of nanoporous molecular sieves

Jabbari-Hichri

Auroux

Bennici

2016

Int. J. Energy Res.

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“…When using an aqueous system, for example, one can then capitalize on the latent heat of water evaporation/ condensation by operating in a partial vacuum. One of the more promising systems in this category uses a concentrated sodium hydroxide solution, 142 which stores its energy in the form of potential dilution and latent heat of water vapor condensation (added later during the discharging cycle). This latter system offers a very high theoretical storage density up to 1350 MJ/m 3 .…”

Section: Thermal Storagementioning

confidence: 99%

Energy in buildings—Policy, materials and solutions

Koebel

Wernery

Malfait

2017

MRS Energy & Sustainability

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Buildings account for ∼40% of global energy demands, and the increased adoption of innovative solutions for buildings represents an enormous potential to reduce energy demands and greenhouse gas emissions. Here, we critically review the current and future materials and solutions for the construction sector. We describe how policy affects innovative businesses and the adoption of new products and solutions. We investigate how the building envelope and user behavior determine building energy demands. Compared to conventional solutions, superinsulation materials (vacuum insulation panels, silica aerogel) can achieve the same thermal performance with drastically thinner insulation. With low-emissivity coatings and appropriate filler gasses, double and triple glazing reduces thermal losses by an order of magnitude. Vacuum and aerogel glazing reduce these even further. Switchable glazing solutions maximize solar gains during wintertime and minimize illumination demands whilst avoiding overheating in summer. Upon integration of renewable energy systems, buildings become both producers and consumers of energy. Combined with the dynamic user behavior, temporal variations in energy production require thermal and electrical storage and the integration of buildings into smart grids and energy district networks. The combination of these measures can reduce the energy consumption of the building's stock by a factor of three.

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Reactor Design for Thermochemical Energy Storage Systems

Helden¹

2022

Advances in Energy Storage

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Closed Sorption Heat Storage based on Aqueous Sodium Hydroxide

Cited by 30 publications

References 2 publications

Effect of NaOH addition on the thermochemical heat storage capacity of nanoporous molecular sieves

Effect of NaOH addition on the thermochemical heat storage capacity of nanoporous molecular sieves

Energy in buildings—Policy, materials and solutions

Reactor Design for Thermochemical Energy Storage Systems

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