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Sulfur based thermochemical energy storage for concentrated solar power

Wong, Bunsen and Thomey, Dennis and Buckingham, Robert and Brown, Lloyd and Roeb, Martin and Sattler, Christian (2013) Sulfur based thermochemical energy storage for concentrated solar power. In: Proceedings of the 7th International Conference on Energy Sustainability and Fuel Cell Science. ASME. 7th International Conference on Energy Sustainability and Fuel Cell Science, 14.-19. Jul. 2013, Minneapolis, MN, USA.

Full text not available from this repository.

Official URL: http://www.asmeconferences.org/ESFuelCell2013/index.cfm

Abstract

A sulfur based thermochemical energy storage cycle for baseload power generation is being developed under the support of US DOE Sunshot program. Solar heat is stored in elemental sulfur via thermal decomposition of sulfuric acid and then disproportionation of sulfur dioxide into elemental sulfur and sulfuric acid. Heat energy is recovered upon sulfur combustion. On-sun decomposition of sulfuric acid in a solar furnace has been demonstrated between 650 and 850°C. Near equilibrium conversion was obtained at high temperature but conversion was reduced due to catalyst poisoning at the lower temperatures. Sulfur dioxide disproportionation modeling showed the reaction driving force is maximized at high system pressure and low system temperature. The effect of system pressure was validated experimentally. However, the disproportionation rate was found to increase with system temperature as a result of increased reaction kinetics. Homogenous iodide catalysts were used to further enhance the degree of disproportionation and the reaction rate. The process steps required to recover the catalyst for reuse have been verified.

Item URL in elib:https://elib.dlr.de/85185/
Document Type:Conference or Workshop Item (Speech)
Title:Sulfur based thermochemical energy storage for concentrated solar power
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Wong, Bunsenbunsen.wong (at) ga.comUNSPECIFIED
Thomey, Dennisdennis.thomey (at) dlr.deUNSPECIFIED
Buckingham, Robertrobert.buckingham (at) ga.comUNSPECIFIED
Brown, Lloydlloyd.brown (at) ga.comUNSPECIFIED
Roeb, MartinMartin.roeb (at) dlr.deUNSPECIFIED
Sattler, Christianchristian.sattler (at) dlr.deUNSPECIFIED
Date:2013
Journal or Publication Title:Proceedings of the 7th International Conference on Energy Sustainability and Fuel Cell Science
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Publisher:ASME
Status:Published
Keywords:Thermochemical cycle, heat storage, Sulfur, disproportionation
Event Title:7th International Conference on Energy Sustainability and Fuel Cell Science
Event Location:Minneapolis, MN, USA
Event Type:international Conference
Event Dates:14.-19. Jul. 2013
Organizer:American Society of Mechanical Engineers
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:Concentrating Solar Systems (old)
DLR - Research area:Energy
DLR - Program:E SF - Solar research
DLR - Research theme (Project):E - Solare Verfahrenstechnik (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solare Verfahrenstechnik
Deposited By: Sattler, Prof. Dr. Christian
Deposited On:15 Nov 2013 11:25
Last Modified:08 May 2014 23:29

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