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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 (2019) Demonstration Reactor System for the Indirect Solar-Thermochemical Reduction of Redox Particles – The Particle Mix Reactor. In: ASME 2019 13th International Conference on Energy Sustainability, V001T04A001. 13th International Conference on Energy Sustainability, 15.-17. Jul 2019, Bellevue, WA, USA. doi: 10.1115/ES2019-3902. ISBN 978-0-7918-5909-4.

Full text not available from this repository.

Official URL: https://asmedigitalcollection.asme.org/ES/proceedings-abstract/ES2019/59094/V001T04A001/1071197


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 time scales. 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/132593/
Document Type:Conference or Workshop Item (Speech)
Title:Demonstration Reactor System for the Indirect Solar-Thermochemical Reduction of Redox Particles – The Particle Mix Reactor
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
Sattler, ChristianChristian.Sattler (at) dlr.dehttps://orcid.org/0000-0002-4314-1124
Date:15 July 2019
Journal or Publication Title:ASME 2019 13th International Conference on Energy Sustainability
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1115/ES2019-3902
Page Range:V001T04A001
Keywords:solar thermochemistry, redox cycles, indirect reactor concept, particles, perovskites
Event Title:13th International Conference on Energy Sustainability
Event Location:Bellevue, WA, USA
Event Type:international Conference
Event Dates:15.-17. Jul 2019
Organizer:American Society of Mechanical Engineers
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: Jülich , Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solar Chemical Engineering
Deposited By: Sattler, Prof. Dr. Christian
Deposited On:27 Dec 2019 12:49
Last Modified:27 Dec 2019 12:49

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