Graphene has emerged as the most popular subject area in the active research field since its discovery in 2004. The published documents illustrate the popularity of Graphene research and innovations, spontaneously increased from about 150 in 2004 to 21,500 in 2018. Graphene is relatively young but high-hope for markets. The cover photo of May 2019 issue describes the structure of a cylindrical Graphene to celebrate the 15th anniversary of it's discovery.
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
Adv. Mater. Lett., 2019, 10 (5), pp 312-318
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-mechanical correlation.
9th Anniversary of Advanced Materials Letters: Progress and Opportunities
Coating - A potent method to enhance electrochemical performance of Li(NixMnyCoz)O2 cathodes for Li-ion batteries
Analysis of machined electron beam treated Ti6Al4V-ELI implant surfaces
Bottom-up design of hydrogels through click-chemistry modification of magnetic nanoparticles
Visualization of mechanical loads with semiconductor nanocrystals
Room temperature growth of ultra porous hot-wire deposited tantalum pentoxide
Substrate integrated circular cavity resonator filled with nano-fibrillated cellulose for humidity detection
Oxygen vacancy filament-based resistive switching in Hf0.5Zr0.5O2 thin films for non-volatile memory
Innovative silicon compatible materials for light emitting devices
Graphene micromesh for transparent conductive films application
Applications of nano-scale Cirrus DopantTM to improve existing coatings
Chitin nanofibrils in renewable materials for packaging and personal care applications
Synthesis of AgNPs embedded double network nanocomposite hydrogels having high swelling and anti-bacterial characteristics
Artificial intelligence and machine learning empowering the mass medicine
Piezo-therapy in cancer: Current research and perspectives
Magnetic microwires for sensor applications
A fundamental study on the mechanistic impact of repeated de- and rehydration of Ca(OH)2 on thermochemical cycling in technical scale
Fabrication and characterization of nano-bridge Josephson junction based on Fe0.94Te0.45Se0.55 thin film
Riboflavin-UVA gelatin crosslinking: Design of a biocompatible and thermo-responsive biomaterial with enhanced mechanical properties for tissue engineering
Broadband and fast photodetectors based on multilayer p-MoTe2/n-WS2 heterojunction with graphene electrodes
Ionic liquid [BMIM][Cl] immobilized on cellulose fibers from pineapple leaves for desulphurization of fuels
Synthesis and role of co-dopants (alkaline earth divalents and halides) on the photoluminescence of Eu2+ doped BaAl2O4 phosphor
Metal oxide (V2O5) incorporated fly ash based geopolymer for better sustainable engineering composites
Highly efficient storage of solar gains using aluminum foam heat exchangers
Green fabrication of zinc oxide nanospheres by aspidopterys cordata for effective antioxidant and antibacterial activity
Effect of diamantane on the thermal stability of cryomilled aluminum alloy
Copyright ©2010-2019 VBRI Press
Full Article