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Solar Thermochemical Generation of Hydrogen: Development of a Receiver Reactor for the Decomposition of Sulfuric Acid

Noglik, Adam und Roeb, Martin und Rzepczyk, Thomas und Hinkley, Jim und Sattler, Christian und Pitz-Paal, Robert (2009) Solar Thermochemical Generation of Hydrogen: Development of a Receiver Reactor for the Decomposition of Sulfuric Acid. Journal of Solar Energy Engineering, 131. DOI: 10.1115/1.3027505

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A critical step of sulfur based thermochemical cycles for hydrogen production from water is the endothermic recomposition of sulfuric acid. The necessary heat can be provided by concentrated solar radiation. A solar receiver-reactor has been developed and built to investigate this process. Experiments with the test reactor were carried out in the DLR solar furnace in Cologne and confirmed the technical feasibility of a receiver-reactor containing porous ceramics for the decomposition of sulfuric acid. The receiver-reactor and strategy of operation were iteratively optimized with respect to chemical conversion and reactor efficiency. Parametric studies were conducted with varying partial pressure of SO3, residence time, absorber temperature, the presence of catalyst, and the performance of different catalysts to quantify their influence on chemical conversion and reactor efficiency. The absorber temperature distribution was found to be the most crucial process parameter. Conversions close to the equilibrium�in some cases exceeding 90%�were achieved with a platinum catalyst. Thermal efficiencies of up to 35% for the foam vaporizer and 30% for the overall reactor were achieved. Enclosing the absorber in a cavity and using separate chambers for the evaporation and the SO3-decomposition were identified as potential measures to improve the reactor.

Titel:Solar Thermochemical Generation of Hydrogen: Development of a Receiver Reactor for the Decomposition of Sulfuric Acid
AutorenInstitution oder E-Mail-AdresseAutoren-ORCID
Roeb, MartinMartin.roeb@dlr.deNICHT SPEZIFIZIERT
Rzepczyk, ThomasMAN FerrostaalNICHT SPEZIFIZIERT
Sattler, Christianchristian.sattler@dlr.deNICHT SPEZIFIZIERT
Pitz-Paal, Robertrobert.pitz-paal@dlr.deNICHT SPEZIFIZIERT
Erschienen in:Journal of Solar Energy Engineering
Referierte Publikation:Ja
In Open Access:Nein
In ISI Web of Science:Ja
DOI :10.1115/1.3027505
Stichwörter:hydrogen, solar thermal, thermochemical cycles, sulfuric acid
HGF - Forschungsbereich:Energie
HGF - Programm:Erneuerbare Energie
HGF - Programmthema:E SF - Solarforschung (alt)
DLR - Schwerpunkt:Energie
DLR - Forschungsgebiet:E SF - Solarforschung
DLR - Teilgebiet (Projekt, Vorhaben):E - Solare Stoffumwandlung (alt)
Standort: Köln-Porz
Institute & Einrichtungen:Institut für Technische Thermodynamik > Solarforschung
Hinterlegt von: Sattler, Prof. Dr. Christian
Hinterlegt am:19 Feb 2010 14:21
Letzte Änderung:12 Dez 2013 20:54

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