scholarly journals Limestone calcination–carbonation in a fluidized bed reactor/receiver for thermochemical energy storage applications

2019 ◽  
Author(s):  
Claudio Tregambi ◽  
Francesca Di Lauro ◽  
Fabio Montagnaro ◽  
Piero Salatino ◽  
Roberto Solimene
Keyword(s):  
Energy Storage ◽  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Energy Storage Applications ◽  
Limestone Calcination

Directly irradiated fluidized bed reactor for thermochemical energy storage and solar fuels production

2020 ◽  
Vol 366 ◽  
pp. 460-469 ◽  
Author(s):  
Claudio Tregambi ◽  
Stefano Padula ◽  
Mariano Galbusieri ◽  
Gianluca Coppola ◽  
Fabio Montagnaro ◽  
...  
Keyword(s):  
Energy Storage ◽  
Fluidized Bed ◽  
Fluidized Bed Reactor ◽  
Solar Fuels

Energy storage through magnesia sulfatation in a fluidized-bed reactor

AIChE Journal ◽  
1988 ◽  
Vol 34 (3) ◽  
pp. 519-523 ◽  
Author(s):  
C. Muller ◽  
G. Flamant
Keyword(s):  
Energy Storage ◽  
Fluidized Bed ◽  
Fluidized Bed Reactor

Development of a Continuous Fluidized Bed Reactor for Thermochemical Energy Storage Application

2019 ◽  
Vol 141 (7) ◽  
Author(s):  
Manuel Wuerth ◽  
Moritz Becker ◽  
Peter Ostermeier ◽  
Stephan Gleis ◽  
Hartmut Spliethoff
Keyword(s):  
Energy Storage ◽  
Fluidized Bed ◽  
State Of The Art ◽  
Scale Up ◽  
Fixed Bed ◽  
Fluidized Bed Reactor ◽  
Fluidized Bed Reactors ◽  
Heat Of Reaction ◽  
Reaction Systems

Thermochemical energy storage (TCES) represents one of the most promising energy storage technologies, currently investigated. It uses the heat of reaction of reversible reaction systems and stands out due to the high energy density of its storage materials combined with the possibility of long-term storage with little to no heat losses. Gas–solid reactions, in particular the reaction systems CaCO3/CaO, CaO/Ca(OH)2 and MgO/Mg(OH)2 are of key interest in current research. Until now, fixed bed reactors are the state of the art for TCES systems. However, fluidized bed reactors offer significant advantages for scale-up of the system: the improved heat and mass transfer allows for higher charging/discharging power, whereas the favorable, continuous operation mode enables a decoupling of storage power and capacity. Even though gas–solid fluidized beds are being deployed for wide range of industrial operations, the fluidization of cohesive materials, such as the aforementioned metal oxides/hydroxides, still represents a sparsely investigated field. The consequent lack of knowledge of physical, chemical, and technical parameters of the processes on hand is currently a hindering aspect for a proper design and scale-up of fluidized bed reactors for MW applications of TCES. Therefore, the experimental research at Technical University of Munich (TUM) focuses on a comprehensive approach to address this problem. Preliminary experimental work has been carried out on a fixed bed reactor to cover the topic of chemical cycle stability of storage materials. In order to investigate the fluidization behavior of the bulk material, a fluidized bed cold model containing a heat flux probe and operating at atmospheric conditions has been deployed. The experimental results have identified the heat input and output as the most influential aspect for both the operation and a possible scale-up of such a TCES system. The decisive parameter for the heat input and output is the heat transfer coefficient between immersed heat exchangers and the fluidized bed. This coefficient strongly depends on the quality of fluidization, which in turn is directly related to the geometry of the gas distributor plate. At TUM, a state-of-the-art pilot fluidized bed reactor is being commissioned to further investigate the aforementioned aspects. This reactor possesses an overall volume of 100 L with the expanded bed volume taking up 30 L. Two radiation furnaces (64 kW) are used to heat the reactor. The heat of reaction of the exothermal hydration reaction is removed by water, evaporating in a cooling coil, immersed in the fluidized bed. Fluidization is being achieved with a mixture of steam and nitrogen at operating temperatures of up to 700 °C and operating pressures between −1 and 6 bar(g). The particle size is in the range of d50 = 20 μm. While initial experiments on this reactor focus on optimal operating and material parameters, the long-term goal is to establish correlations for model design and scale-up purposes.

scholarly journals Effect of Mn and Cu Substitution on the SrFeO3 Perovskite for Potential Thermochemical Energy Storage Applications

Processes ◽  
2021 ◽  
Vol 9 (10) ◽  
pp. 1817
Author(s):  
Esraa Darwish ◽  
Moufida Mansouri ◽  
Duygu Yilmaz ◽  
Henrik Leion
Keyword(s):  
Energy Storage ◽  
Fluidized Bed ◽  
Thermal Analyses ◽  
Cyclic Behavior ◽  
Cyclic Stability ◽  
Oxygen Release ◽  
Scanning Calorimetry ◽  
Redox Cycles ◽  
Cu Substitution ◽  
Energy Storage Applications

Perovskites are well-known oxides for thermochemical energy storage applications (TCES) since they show a great potential for spontaneous O2 release due to their non-stoichiometry. Transition-metal-based perovskites are particularly promising candidates for TCES owing to their different oxidation states. It is important to test the thermal behavior of the perovskites for TCES applications; however, the amount of sample that can be used in thermal analyses is limited. The use of redox cycles in fluidized bed tests can offer a more realistic approach, since a larger amount of sample can be used to test the cyclic behavior of the perovskites. In this study, the oxygen release/consumption behavior of Mn- or Cu-substituted SrFeO3 (SrFe0.5M0.5O3; M: Mn or Cu) under redox cycling was investigated via thermal analysis and fluidized bed tests. The reaction enthalpies of the perovskites were also calculated via differential scanning calorimetry (DSC). Cu substitution in SrFeO3 increased the performance significantly for both cyclic stability and oxygen release/uptake capacity. Mn substitution also increased the cyclic stability; however, the presence of Mn as a substitute for Fe did not improve the oxygen release/uptake performance of the perovskite.

Thermofluid effect on energy storage in fluidized bed reactor

2016 ◽  
Vol 74 (2) ◽  
pp. 24613
Author(s):  
Nadjiba Mahfoudi ◽  
Mohammed El Ganaoui ◽  
Abdelhafid Moummi
Keyword(s):  
Energy Storage ◽  
Fluidized Bed ◽  
Fluidized Bed Reactor

Removal of microcystin-LR from drinking water with TiO2-coated activated carbon

2004 ◽  
Vol 4 (5-6) ◽  
pp. 21-28
Author(s):  
S.-C. Kim ◽  
D.-K. Lee
Keyword(s):  
Drinking Water ◽  
Activated Carbon ◽  
Synergistic Effect ◽  
Fluidized Bed ◽  
Continuous Flow ◽  
High Surface ◽  
High Surface Area ◽  
Fluidized Bed Reactor ◽  
Exterior Surface ◽  
Tio2 Particles

TiO2-coated granular activated carbon was employed for the removal of toxic microcystin-LR from water. High surface area of the activated carbon provided sites for the adsorption of microcystin-LR, and the adsorbed microcystin-LR migrated continuously onto the surface of TiO2 particles which located mainly at the exterior surface in the vicinity of the entrances of the macropores of the activated carbon. The migrated microcystin-LR was finally degraded into nontoxic products and CO2 very quickly. These combined roles of the activated carbon and TiO2 showed a synergistic effect on the efficient degradation of toxic microcystin-LR. A continuous flow fluidized bed reactor with the TiO2-coated activated carbon could successfully be employed for the efficient photocatalytic of microcystin-LR.

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