A fundamental study on the mechanistic impact of repeated de- and rehydration of Ca(OH)2 on thermochemical cycling in technical scale A fundamental study on the mechanistic impact of repeated de- and rehydration of Ca(OH)2 on thermochemical cycling in technical scale
Department of Chemistry and Biology, Institute of Building and Materials Chemistry, University of Siegen, Paul-Bonatz-Strasse 9 - 11, Siegen, 57076, Germany
Adv. Mater. Lett., 2019, 10 (5), pp 312-318
DOI: 10.5185/amlett.2019.2190
Publication Date (Web): Jan 14, 2019
Copyright © IAAM-VBRI Press
E-mail: afflerbach@chemie.uni-siegen.de
A major scientific challenge for carbon neutral, environmental friendly future energy production is the development of renewable energy production to technological readiness. One example are solar thermal power plants. Since their energy generation is intermittent, they demand for a feasible storage solution for which thermochemical reaction systems are considered. The present work subjects the thermochemical reaction system CaO / Ca(OH)2 and its structural-mechanical correlations impacting the powder bulk performance upon thermochemical cycling. On exemplified Ca(OH)2 crystals is shown, that during the first de- and rehydration process, the entire crystal morphology is disintegrated. The underlying mechanism is evaluated by theoretical considerations on the layered structure of Ca(OH)2 and validated by scanning electron microscopy (SEM) on the probed material before and after dehydration as well as after rehydration. The obtained findings are transferred to the technically relevant powdery storage material, where they are capable to explain the phenomenon of agglomeration, which is proven by measurement of secondary particle size distribution over a number of ten thermochemical reaction cycles. From SEM imaging performed on the samples it is found, that agglomerates consist of cohering smaller particles. The inferred insights can help to deduce necessary amendments of reactor design or material modification also for other thermochemical reaction systems.
Thermochemical energy storage, calcium hydroxide, dehydration mechanism, agglomeration, structural-mechanical correlation.
Advanced Materials Research and Innovation Priorities for Accomplishing the Sustainable Development Goals
Contemporary Advances in Humidity Sensing Materials, Methods, and Performances
Roles of the Debye Length and Skin Depth in the Characterization of Space Charge Interactions in Semiconductor Nanoparticles
Antifungal Activity of Iron-gold and Cobalt-gold co-doped ZnO Nanoparticles
Adsorption and Thermodynamic Parameters of Activated Carbon-Diazepam Systems in Simulated Gastric Fluid
Synthesis, Impedance and Current-Voltage Spectroscopic Characterization of Novel Gadolinium Titanate Nano Structures
Removal of Toxic Dyes from Industrial Waste Water using Chitosan Grafted Itaconic Acid Nanocomposites
Structural, Optical and dielectric properties of Sr doped LaVO4
Design, 3D Development and Finite Element Analysis of Cylindrical Mesh Cage Bioimplants from Biometals
Advancements in Materials Technology for Accomplishing Sustainable Development Goals
A Review for Luminescence Property of Materials, Its Detection and Probabilities for Embedding of Luminescence with MEMS Technology
A Review on Low-Cost Adsorbents for Cadmium Pollutant Removal from Industrial Effluents
Study of Applications of Radial Basis Function Network in Forecasting
Simulation of LPG Pressure Vessel under Fire Engulfment
Strength Analysis of Friction Stir Welding (FSW) Joint Under Minimize Rotation Speed of FSW Tool
Formation of Pure In2O3 pallets for OLED Application
Study of Soil Nitrogen Level and Splitting on Nutrient Uptake around the Industries of Chhattisgarh, India