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Demonstration Reactor System for the Indirect Solar Thermochemical Reduction of Redox Particles—The Particle Mix Reactor

Richter, Sebastian and Brendelberger, Stefan and Gersdorf, Felix and Oschmann, Tobias and Sattler, Christian (2020) Demonstration Reactor System for the Indirect Solar Thermochemical Reduction of Redox Particles—The Particle Mix Reactor. Journal of Energy Resources Technology, 142, 051302-2. American Society of Mechanical Engineers (ASME). doi: 10.1115/1.4046315. ISSN 0195-0738.

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Official URL: https://asmedigitalcollection.asme.org/energyresources/article/doi/10.1115/1.4046315/1074440/Demonstration-Reactor-System-for-the-Indirect

Abstract

In contrast to thermal receivers that provide heat for steam cycles, in solar thermochemistry often receiver-reactors are used, where materials undergo a reaction while being irradiated by concentrated sunlight. When applied to two-step redox cycles, multiple processes take place in such receiver-reactors, though on different timescales. This leads to design compromises and to high technical requirements for the implementation. A concept for an indirect particle-based system for thermochemical cycles was therefore proposed in which the heat required for the reduction of redox particles is provided by inert heat transfer particles that absorb concentrated solar radiation in a dedicated particle receiver. The novel and central component in this indirect system is the particle mix reactor. It functions by mixing the two particle types for heat transfer and establishing a controlled atmosphere under decreased oxygen partial pressures in a common reactor chamber. The design of an experimental setup for demonstration and investigation of the particle mix reactor is presented in this work. Potential operation modes and design options for particle heater, mixing unit, and oxygen partial pressure decrease are discussed and illustrated. The selection of a mixer type is based on the homogeneity of the obtained mixture. It is supported by the use of discrete element method (DEM) simulations, which were compared to experimental results from a separate setup. Heat loss estimations for the mixing process in the selected mixer geometry are performed for alumina heat transfer particles and strontium iron oxide redox particles. The components’ geometries, the overall experimental setup design, as well as operation steps are presented.

Item URL in elib:https://elib.dlr.de/134478/
Document Type:Article
Title:Demonstration Reactor System for the Indirect Solar Thermochemical Reduction of Redox Particles—The Particle Mix Reactor
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Richter, SebastianSebastian.Richter (at) dlr.deUNSPECIFIED
Brendelberger, StefanStefan.Brendelberger (at) dlr.deUNSPECIFIED
Gersdorf, FelixFelix.Gersdorf (at) ruhr-uni-bochum.deUNSPECIFIED
Oschmann, Tobiastobias.oschmann (at) iav.deUNSPECIFIED
Sattler, ChristianChristian.Sattler (at) dlr.dehttps://orcid.org/0000-0002-4314-1124
Date:12 February 2020
Journal or Publication Title:Journal of Energy Resources Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:142
DOI :10.1115/1.4046315
Page Range:051302-2
Editors:
EditorsEmailEditor's ORCID iD
Koepf, ErikUNSPECIFIEDUNSPECIFIED
Publisher:American Society of Mechanical Engineers (ASME)
ISSN:0195-0738
Status:Published
Keywords:solar thermochemistry, redox cycles, indirect reactor concept, particles, perovskites, alternative energy sources, energy storage systems, hydrogen energy, renewable energy
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Solar Fuels
DLR - Research area:Energy
DLR - Program:E SW - Solar and Wind Energy
DLR - Research theme (Project):E - Solar Fuels (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solar Chemical Engineering
Deposited By: Sattler, Prof. Dr. Christian
Deposited On:30 Mar 2020 08:29
Last Modified:30 Mar 2020 08:29

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