A fundamental study on the mechanistic impact of repeated de- and rehydration of Ca(OH)2 on thermochemical cycling in technical scale
Sandra Afflerbach*, Reinhard Trettin
Department of Chemistry and Biology, Institute of Building and Materials Chemistry, University of Siegen, Paul-Bonatz-Strasse 9 - 11, Siegen, 57076, Germany
DOI: 10.5185/amlett.2019.2190
Publication Date (Web): Jan 14, 2019
Copyright © 2018 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&ndash,mechanical correlation.
Tech-footprints for virtual medicine
Advances in corrosion inhibition materials and technologies: A review
Ring models of atoms, molecules and nanomaterials
(FeCo/Ppy@C): Pt-free FeCo-Polypyrrole Nanocomposites Supported on Porous Carbon for Electrochemical Application
Physical and mechanical properties of microwave absorber material containing micro and nano barium ferrite
Formation of nano-dispersed Cu particles during aging of a Fe-Cu alloy and dislocation effect
Preparation of novel tragacanth gum-entrapped lecithin nanogels
Modulation of optical properties with multilayer thickness in antimonene and indiene
Bi-doped CH3NH3PbI3 effective masses and electronic properties research: A theoretical study using VASP
Novel synthesis of Pd nanosheets used as highly sensitive SERS substrate for trace fluorescent dye detection
Silver nanoparticles mediated by extract of Guar plant (Cyamopsis tetragonoloba), and evaluation of their photocatalytic and antibacterial properties
Study of TiO2 nanofibers prepared by electrospinning technique
Determination of leachate pollution content in soil using in-situ dielectric measurement
Intelligent healthcare for future medicine
Review of nanoscale layered transition metal chalcogenide superconductors
Evaluation of NSAIDs antioxidant activity on lipid peroxidation in splenocyte membranes
Morphological, structural, thermal and degradation properties of polylactic acid-waxy maize starch nanocrystals based nanocomposites prepared by melt processing
Influence of surfactant on the patterning behavior of nanosilver within polyacrylamide nanogels
Cell study of the biomimetic modifications on a CoCrMo alloy for biomedical applications
SPIONs and curcumin co-encapsulated mixed micelles based nanoformulation for biomedical applications
Fabrication of Y2O3 coatings by cold-spray
Triclinic LiVPO4F/C cathode for aqueous rechargeable lithium-ion batteries
PRAP-CVD: Up-scalable process for the deposition of PEDOT thin films
Effect of storage time, plasticizer formulation and extrusion parameters on the performance of thermoplastic starch films
Effect of silver nanoparticles on the ammonia gas sensing behavior in diphenylamine based conjugated polymer
Study the possibility of using sisal fibres in building applications
Copyright ©2010-2019 VBRI Press
Full Article PDF