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Solar water splitting for hydrogen production with monolithic reactors

Agrafiotis, Christos and Roeb, Martin and Konstandopoulos, Athanasios G. and Nalbandian, L. and Zaspalis, V.T. and Sattler, Christian and Stobbe, Per and Schäfer, Andrew (2005) Solar water splitting for hydrogen production with monolithic reactors. Solar Energy, 79, pp. 409-421. Elsevier.

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Abstract

The present work proposes the exploitation of solar energy for the dissociation of water and production of hydrogen via an integrated thermo-chemical reactor/receiver system. The basic idea is the use of multi-channelled honeycomb ceramic supports coated with active redox reagent powders, in a configuration similar to that encountered in automobile exhaust catalytic aftertreatment. Iron-oxide-based redox materials were synthesized, capable to operate under a complete redox cycle: they could take oxygen from water producing pure hydrogen at reasonably low temperatures (800 °C) and could be regenerated at temperatures below 1300 �C. Ceramic honeycombs capable of achieving temperatures in that range when heated by concentrated solar radiation were manufactured and incorporated in a dedicated solar receiver/reactor. The operating conditions of the solar reactor were optimised to achieve adjustable, uniform temperatures up to 1300 °C throughout the honeycomb, making thus feasible the operation of the complete cycle by a single solar energy converter.

Document Type:Article
Title:Solar water splitting for hydrogen production with monolithic reactors
Authors:
AuthorsInstitution or Email of Authors
Agrafiotis, ChristosCERTH/CPERI APTL
Roeb, MartinUNSPECIFIED
Konstandopoulos, Athanasios G.CERTH/CPERI APTL
Nalbandian, L.CERTH/CPERI APTL
Zaspalis, V.T.CERTH/CPERI APTL
Sattler, ChristianUNSPECIFIED
Stobbe, PerStobbeTech
Schäfer, AndrewJohnson Matthey
Date:4 June 2005
Journal or Publication Title:Solar Energy
Volume:79
Page Range:pp. 409-421
Editors:
EditorsEmail
Malato, SixtoUNSPECIFIED
Publisher:Elsevier
Status:Published
Keywords:Water-splitting, Solar; Redox materials, Iron oxide, Honeycomb reactors, Hydrogen
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 Stoffumwandlung (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Technical Thermodynamics > Solar Research
Deposited By: Dr.rer.nat. Christian Sattler
Deposited On:09 Aug 2007
Last Modified:12 Dec 2013 20:25

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