The study of properties of composite adsorptive materials “silica gel – crystalline hydrate” for heat storage devices

Authors

DOI:

https://doi.org/10.15587/1729-4061.2018.123896

Keywords:

heat-accumulating materials, composite sorbents, sol-gel synthesis, adsorption heat, energy storage density, kinetics of hydration

Abstract

Heat energy storage is one of the most common technical solutions in the conditions of operation of low-potential and renewable energy sources. Adsorption heat energy storage devices based on the composite media “silica gel – salt” are the most effective in these conditions. The technique and technology of sol-gel synthesis of the composite adsorption materials “silica gel – sodium sulfate” and “silica gel – sodium acetate” have been developed. A special feature of this technique is a two-stage process involving the formation of silicon phase nuclei in the interaction of aqueous solutions of silicate glass and sulphuric or acetic acids in the presence of a polymeric quaternary ammonium salt and subsequent coarsening of the particles with the gradual addition of solutions of silicate glass and the corresponding acids. The essence of the technology consists in successive stages of formation and integration of the silicic phase nuclei, hydrolysis of functional OH- groups, filtration and drying of the fine precipitate. A qualitative difference in the adsorption properties of the synthesized composites and the mechanical mixture of salt – silica gel with sorption capacity inferior to them on average by 30% is revealed by differential thermal analysis. The processes of application of the composite adsorption materials “silica gel – sodium sulfate” and “silica gel – sodium acetate” obtained by the sol-gel method have been studied. A qualitative difference in the kinetics of adsorption of water by the composite adsorbents is shown as compared to massive salts. It is established that the amount of heat of adsorption of water vapor by the composite adsorbents of the materials “silica gel – sodium sulfate” and “silica gel – sodium acetate” is approximately 30 % greater than the linear superposition of salt and silica gel.

Author Biographies

Kostyantyn Sukhyy, Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 49005

Doctor of Technical Sciences, Professor

Department of Processing of Plastics and Photo-, Nano- and polygraphic materials

Elena Belyanovskaya, Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 49005

PhD, Аssociate Professor

Department of Power Engineering

Vadym Kovalenko, Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 49005 Vyatka State University Moskovskaya str., 36, Kirov, Russian Federation, 610000

PhD, Associate Professor

Department of Analytical Chemistry and Food Additives and Cosmetics

Department of Technologies of Inorganic Substances and Electrochemical

Manufacturing

Valerii Kotok, Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 49005 Vyatka State University Moskovskaya str., 36, Kirov, Russian Federation, 610000

PhD, Associate Professor

Department of Processes, Apparatus and General Chemical Technology

Department of Technologies of Inorganic Substances and Electrochemical Manufacturing

Mikhaylo Sukhyy, Ukrainian State University of Chemical Technology Gagarina ave., 8, Dnipro, Ukraine, 49005

PhD, Professor, Head of Department

Department of Power Engineering

Olena Kolomiyets, National metallurgical academy of Ukraine Gagarina ave., 4, Dnipro, Ukraine, 49600

PhD, Assistant

Department of industrial power system

Mykhailo Gubynskyi, National metallurgical academy of Ukraine Gagarina ave., 4, Dnipro, Ukraine, 49600

Doctor of Technical Sciences, Professor

Department of industrial power system

Oleksandr Yeromin, National metallurgical academy of Ukraine Gagarina ave., 4, Dnipro, Ukraine, 49600

Doctor of Technical Sciences, Professor

Department of Ecology, Heat-Transfer and labour protection

Olena Prokopenko, National metallurgical academy of Ukraine Gagarina ave., 4, Dnipro, Ukraine, 49600

PhD, Associate Professor

Department of Ecology, Heat-Transfer and labour protection

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Published

2018-02-19

How to Cite

Sukhyy, K., Belyanovskaya, E., Kovalenko, V., Kotok, V., Sukhyy, M., Kolomiyets, O., Gubynskyi, M., Yeromin, O., & Prokopenko, O. (2018). The study of properties of composite adsorptive materials “silica gel – crystalline hydrate” for heat storage devices. Eastern-European Journal of Enterprise Technologies, 1(6 (91), 52–58. https://doi.org/10.15587/1729-4061.2018.123896

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Section

Technology organic and inorganic substances