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Hydrogen Production Via Sulphur Based Thermochemical Cycles: Development And Assessment of Key Components of the Process

Roeb, Martin and Thomey, Dennis and de Oliveira, Lamark and Sattler, Christian and Fleury, G. and Pra, F. and Tochon, P. and Brevet, A. and Roux, G. and Gruet, N. and Mansilla, C. and LeNaour, F. and Poitou, S. and Allen , R.W.K. and Elder, R. and Kargiannakis, G. and Agrafiotis, C. and Zygogianni, A. and Pagkoura, C. and Konstandopoulos, A.G. and Giaconia , A. and Sau, S. and Tarquini, P. and Kosmidou, T. and Hähner, P. and Haussener, S. and Steinfeld, A. and Canadas, I. and Orden, A. and Ferrato, M. (2012) Hydrogen Production Via Sulphur Based Thermochemical Cycles: Development And Assessment of Key Components of the Process. In: Konferenzproceedings. 12th International Conference on Hydrogen Production - ICH2P, 24.-27. Juni 2012, Seoul, Korea.

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Abstract

HycycleS was a cooperation of nine European partners and further non-European partners and aimed at the qualification and enhancement of materials and components for key steps of solar and nuclear powered thermochemical cycles for hydrogen generation from water. The focus of HycycleS was the decomposition of sulphuric acid which is the central step of the sulphur-based family of those processes, especially the hybrid sulphur cycle (HyS) and the sulphur-iodine cycle (SI). Emphasis was put on materials and components for sulphuric acid evaporation, decomposition, and sulphur dioxide separation. The suitability of materials and components was demonstrated by decomposing sulphuric acid and separating its decomposition products in scalable prototypes. Silicon Carbide (SiC) turned out as the material of choice for the components facing the most corrosive environment of the process: the sulphuric acid evaporator and decomposer. Candidate catalysts for the high temperature reduction of sulphur trioxide have been screened and analysed – mainly considering oxides of transition metals. Their catalytic activity and their durability has been investigated and quantified experimentally. It was concluded that a Cr-Fe mixed oxide (Fe0.7Cr1.3O3) is the most promising material among the ones examined. Based on the use of the highlighted construction and catalyst materials prototype decomposers have been developed and tested. The successful fabrication and testing of a large size heat exchanger/reactor prototype composed of SiC plates shows promise with respect to its use for sulphuric acid decomposition in the SI and HyS cycle. A solar specific decomposer prototype was developed, realised and tested on sun in a solar furnace. It has been designed for a direct coupling of concentrated solar radiation into the process and makes use of a two-chamber reactor with volumetric absorbers which allows performance of both solar evaporation of liquid H2SO4 and subsequent catalytic decomposition of SO3. Design activities and experimental series are accompanied and supported by different methods of reactor and process simulation. A novel approach of using dense oxygen transport membranes, made from novel and complex ceramics, for oxygen removal from the H2SO4 decomposition product in order to shift the equilibrium in favour of increased decomposition was investigated. The membranes stability and suitability for carrying out this separation was investigated experimentally. Parallel to this, a conventional oxygen separator, a low-temperature wet scrubbing system, was investigated as well. Finally, scale-up scenarios of individual components and of the process have been addressed.

Item URL in elib:https://elib.dlr.de/77833/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Hydrogen Production Via Sulphur Based Thermochemical Cycles: Development And Assessment of Key Components of the Process
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Roeb, MartinUNSPECIFIEDUNSPECIFIED
Thomey, DennisUNSPECIFIEDUNSPECIFIED
de Oliveira, LamarkUNSPECIFIEDUNSPECIFIED
Sattler, ChristianUNSPECIFIEDUNSPECIFIED
Fleury, G.UNSPECIFIEDUNSPECIFIED
Pra, F.UNSPECIFIEDUNSPECIFIED
Tochon, P.UNSPECIFIEDUNSPECIFIED
Brevet, A.UNSPECIFIEDUNSPECIFIED
Roux, G.UNSPECIFIEDUNSPECIFIED
Gruet, N.UNSPECIFIEDUNSPECIFIED
Mansilla, C.UNSPECIFIEDUNSPECIFIED
LeNaour, F.UNSPECIFIEDUNSPECIFIED
Poitou, S.UNSPECIFIEDUNSPECIFIED
Allen , R.W.K.UNSPECIFIEDUNSPECIFIED
Elder, R.UNSPECIFIEDUNSPECIFIED
Kargiannakis, G.UNSPECIFIEDUNSPECIFIED
Agrafiotis, C.UNSPECIFIEDUNSPECIFIED
Zygogianni, A.UNSPECIFIEDUNSPECIFIED
Pagkoura, C.UNSPECIFIEDUNSPECIFIED
Konstandopoulos, A.G.UNSPECIFIEDUNSPECIFIED
Giaconia , A.UNSPECIFIEDUNSPECIFIED
Sau, S.UNSPECIFIEDUNSPECIFIED
Tarquini, P.UNSPECIFIEDUNSPECIFIED
Kosmidou, T.UNSPECIFIEDUNSPECIFIED
Hähner, P.UNSPECIFIEDUNSPECIFIED
Haussener, S.UNSPECIFIEDUNSPECIFIED
Steinfeld, A.UNSPECIFIEDUNSPECIFIED
Canadas, I.UNSPECIFIEDUNSPECIFIED
Orden, A.UNSPECIFIEDUNSPECIFIED
Ferrato, M.UNSPECIFIEDUNSPECIFIED
Date:27 June 2012
Journal or Publication Title:Konferenzproceedings
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:hydrogen, sulphuric acid, solar fuel, thermochemical cycle, heat exchanger, solar reactor, solar chemistry
Event Title:12th International Conference on Hydrogen Production - ICH2P
Event Location:Seoul, Korea
Event Type:international Conference
Event Dates:24.-27. Juni 2012
HGF - Research field:Energy
HGF - Program:Renewable Energies
HGF - Program Themes:E SF - Solar research (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: Roeb, Dr.rer.nat. Martin
Deposited On:20 Nov 2012 17:08
Last Modified:20 Nov 2012 17:08

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