scholarly journals Pyrolysis of Methane and Ethane in a Compression–Expansion Process as a New Concept for Chemical Energy Storage: A Kinetic and Exergetic Investigation

2021 ◽  
pp. 2000948
Author(s):  
Charlotte Rudolph ◽  
Burak Atakan
Keyword(s):  
Energy Storage ◽  
Chemical Energy ◽  
Expansion Process

Thermal characterization of ABS-Graphene blended three dimensional printed functional prototypes for electro chemical energy storage

2018 ◽  
Vol 1 (1) ◽  
pp. 1-11 ◽  
Author(s):  
Kamaljit Singh Boparai ◽  
Rupinder Singh
Keyword(s):  
Energy Storage ◽  
Structural Changes ◽  
Fused Deposition Modeling ◽  
Morphological Changes ◽  
Three Dimensional ◽  
Thermal Characterization ◽  
Chemical Energy ◽  
Flow Index ◽  
Fused Deposition

This study highlights the thermal characterization of ABS-Graphene blended three dimensional (3D) printed functional prototypes by fused deposition modeling (FDM) process. These functional prototypes have some applications as electro-chemical energy storage devices (EESD). Initially, the suitability of ABS-Graphene composite material for FDM applications has been examined by melt flow index (MFI) test. After establishing MFI, the feedstock filament for FDM has been prepared by an extrusion process. The fabricated filament has been used for printing 3D functional prototypes for printing of in-house EESD. The differential scanning calorimeter (DSC) analysis was conducted to understand the effect on glass transition temperature with the inclusion of Graphene (Gr) particles. It has been observed that the reinforced Gr particles act as a thermal reservoir (sink) and enhances its thermal/electrical conductivity. Also, FT-IR spectra realized the structural changes with the inclusion of Gr in ABS matrix. The results are supported by scanning electron microscopy (SEM) based micrographs for understanding the morphological changes.

scholarly journals MgSO4·7H2O filled macro cellular foams: An innovative composite sorbent for thermo-chemical energy storage applications for solar buildings

Solar Energy ◽  
2018 ◽  
Vol 173 ◽  
pp. 1278-1286 ◽  
Author(s):  
Vincenza Brancato ◽  
Luigi Calabrese ◽  
Valeria Palomba ◽  
Andrea Frazzica ◽  
Margalida Fullana-Puig ◽  
...  
Keyword(s):  
Energy Storage ◽  
Chemical Energy ◽  
Composite Sorbent ◽  
Cellular Foams ◽  
Energy Storage Applications ◽  
Macro Cellular

Power-to-Fuel and Artificial Photosynthesis for Chemical Energy Storage

2016 ◽  
pp. 493-566
Author(s):  
Albert Tarancón ◽  
Cristian Fábrega ◽  
Alex Morata ◽  
Marc Torrell ◽  
Teresa Andreu
Keyword(s):  
Energy Storage ◽  
Artificial Photosynthesis ◽  
Chemical Energy

scholarly journals Compression–Expansion Processes for Chemical Energy Storage: Thermodynamic Optimization for Methane, Ethane and Hydrogen

Energies ◽  
2019 ◽  
Vol 12 (17) ◽  
pp. 3332 ◽  
Author(s):  
Burak Atakan
Keyword(s):  
Energy Storage ◽  
Mechanical Energy ◽  
Initial Mixture ◽  
Chemical Energy ◽  
Specific Work ◽  
Chemical Exergy ◽  
Chemical Equilibration ◽  
Work Input ◽  
Exergy Losses ◽  
Argon Content

Several methods for chemical energy storage have been discussed recently in the context of fluctuating energy sources, such as wind and solar energy conversion. Here a compression–expansion process, as also used in piston engines or compressors, is investigated to evaluate its potential for the conversion of mechanical energy to chemical energy, or more correctly, exergy. A thermodynamically limiting adiabatic compression–chemical equilibration–expansion cycle is modeled and optimized for the amount of stored energy with realistic parameter bounds of initial temperature, pressure, compression ratio and composition. As an example of the method, initial mixture compositions of methane, ethane, hydrogen and argon are optimized and the results discussed. In addition to the stored exergy, the main products (acetylene, benzene, and hydrogen) and exergetic losses of this thermodynamically limiting cycle are also analyzed, and the volumetric and specific work are discussed as objective functions. It was found that the optimal mixtures are binary methane argon mixtures with high argon content. The predicted exergy losses due to chemical equilibration are generally below 10%, and the chemical exergy of the initial mixture can be increased or chemically up-converted due to the work input by approximately 11% in such a thermodynamically limiting process, which appears promising.

Chemical energy storage by the reaction cycle CuO/Cu2O

1989 ◽  
Vol 13 (1) ◽  
pp. 63-73 ◽  
Author(s):  
Deepak Chadda ◽  
James D. Ford ◽  
M. A. Fahim
Keyword(s):  
Energy Storage ◽  
Chemical Energy ◽  
Reaction Cycle

Optimization of LiNO3–Mg(OH)2 composites as thermo-chemical energy storage materials

2020 ◽  
Vol 262 ◽  
pp. 110258 ◽  
Author(s):  
Shuo Li ◽  
Jia Liu ◽  
Tianwei Tan ◽  
Jiapei Nie ◽  
Huili Zhang
Keyword(s):  
Energy Storage ◽  
Chemical Energy ◽  
Energy Storage Materials ◽  
Storage Materials

scholarly journals Renewable electricity storage using electrolysis

2019 ◽  
Vol 117 (23) ◽  
pp. 12558-12563 ◽  
Author(s):  
Zhifei Yan ◽  
Jeremy L. Hitt ◽  
John A. Turner ◽  
Thomas E. Mallouk
Keyword(s):  
Energy Storage ◽  
Water Electrolysis ◽  
Electrical Energy ◽  
Chemical Energy ◽  
Liquid Fuels ◽  
System Level ◽  
Renewable Electricity ◽  
Short Term ◽  
Stable Chemical ◽  
Renewable Energy Storage

Electrolysis converts electrical energy into chemical energy by storing electrons in the form of stable chemical bonds. The chemical energy can be used as a fuel or converted back to electricity when needed. Water electrolysis to hydrogen and oxygen is a well-established technology, whereas fundamental advances in CO2electrolysis are still needed to enable short-term and seasonal energy storage in the form of liquid fuels. This paper discusses the electrolytic reactions that can potentially enable renewable energy storage, including water, CO2and N2electrolysis. Recent progress and major obstacles associated with electrocatalysis and mass transfer management at a system level are reviewed. We conclude that knowledge and strategies are transferable between these different electrochemical technologies, although there are also unique complications that arise from the specifics of the reactions involved.

scholarly journals A Modular Reactor for Thermochemical Energy Storage Examination of Ettringite-Based Materials

Proceedings ◽  
2019 ◽  
Vol 34 (1) ◽  
pp. 18 ◽  
Author(s):  
Chen ◽  
Kuznik ◽  
Horgnies ◽  
Johannes ◽  
Morin ◽  
...  
Keyword(s):  
Renewable Energy ◽  
Energy Storage ◽  
Energy Density ◽  
Storage Temperature ◽  
Residential Buildings ◽  
High Energy ◽  
Green Energy ◽  
Hot Water ◽  
Chemical Energy ◽  
Scanning Calorimetry

More attention on renewable energy has been attracted after the achievement of Paris Agreement against climate change. Solar-based technology is supposed to be one of the most promising green energy technologies for residential buildings since its wide thermal usage for hot water and heating. However, the seasonal mismatch between its energy-production and consumption makes buildings need an energy storage system to improve the efficiency of renewable energy use. Indeed, even if different kinds of energy storage systems using sensible or latent heat already exist, thermochemical energy storage can be then recommended by considering the problems of energy dissipation during storage and low energy density for the first two methods. As potential thermochemical storage materials, ettringite (3CaO∙Al2O3∙3CaSO4∙32H2O) based materials possess high energy densities (~500 kWh/m3), low material cost (<1000 €/m3) and low storage temperature (~60–70°C), compared to salt hydrates of similar energy density like SrBr2·6H2O (42 k€/m3, ~80°C), LaCl3·7H2O (38 k€/m3, ~100°C) and MgSO4·7H2O (5 k€/m3, ~150°C). Therefore, ettringite-based materials have the possibility to be largely used in building sector by being coupled to normal solar collector systems via reversible chemical reactions (Equation (1)): (i) charging mode: hot air or hot water (>70°C) from solar collectors dehydrates ettringite to meta-ettringite, and consequently store heat to chemical energy; ii) discharging mode: humid air is pumped to material container to rehydrate meta-ettringite, and consequently release stored chemical energy as heating. However, the lack of extensive examination leads to poor knowledge on their thermal properties and limits maturity of this technology. Therefore, the aim of this work is to characterize the capacity of an ettringite-based material (named C80P20, containing ~70 wt.% ettringite) in terms of thermal energy storage by Thermogravimetric Analysis (TGA) and Differential Scanning Calorimetry (DSC). Besides, a modular reactor adapting to thermal characterizations of C80P20 particles has been developed for various weights (up to 300 grams). In our case, the energy density of pure ettringite is around 1012 J/g while 708 J/g for C80P20 powder in TGA-DSC. First preliminary results from modular reactor demonstrate a general energy density of 150 kWh/m3 released by the hydration process of C80P20 grains (pre-dehydrated at 80 °C) at 25 °C and 85% relative humidity. Moreover, the reactor is intended to study the durability of the energy storage material over time, and also as function of the number of charging/discharging cycles.CaO∙Al2O3∙3CaSO4∙32H2O ettringite+heat↔3CaO∙Al2O3∙3CaSO4∙32-XH2Ometa-ettringite+XH2O

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