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Evaluating the performance of photocatalysts with regard to spectral irradiation using the SoCRatus

Wullenkord, Michael and Jung, Christian (2015) Evaluating the performance of photocatalysts with regard to spectral irradiation using the SoCRatus. In: Proceedings 1st International Solar Fuels Conference (ISF-1), E:Po-4. 1st International Solar Fuels Conference (ISF-1), 26. Apr. - 01. Mai 2015, Uppsala, Schweden.

[img] PDF (Abstract)
[img] PDF (Poster)


Photochemical or photoelectrochemical processes can be employed for simultaneous treatment of waste water and hydrogen production. Thereby abundant but unsteady solar radiation is used to produce a potent chemical energy carrier. The development and demonstration of suitable reactor devices are addressed in the scope of the German project DuaSol. DLR’s test facility SoCRatus (Solar Concentrator with a Rectangular Flat Focus) – see Fig.1 – will be employed in the experimental assessment of developed devices with respect to solar efficiency and stability. First ideas concerning the concentrator were presented in [1]. The SoCRatus specified by a geometric concentration ratio of 20.2 provides homogeneous concentrated solar radiation in the rectangular focus extended to 2500 mm x 100 mm. A representative local standard deviation of irradiation relative to the mean of 2.4% could be determined. [2] The inlet optics of a spectrometer covering wavelengths in the range from 250 nm to 850 nm is directly located in the focal plane. Additionally a pyrheliometer for DNI measurement mounted at the concentrator structure allows the calculation of the total solar input on the photochemical system. As a result the solar-to-hydrogen efficiency can be contrasted with efficiencies respecting specific wavelength ranges. Four identical fluid cycles are available for connection to reactors. The product gas leaving the reactors is analysed by micro gas-phase chromatographs. The UV-part of incoming solar radiation varies significantly during a day. First experimental findings confirm that the productivity of the applied TiO2 based photocatalysts correlates rather with the UV irradiation than with the DNI.

Item URL in elib:https://elib.dlr.de/96446/
Document Type:Conference or Workshop Item (Poster)
Title:Evaluating the performance of photocatalysts with regard to spectral irradiation using the SoCRatus
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Wullenkord, Michaelmichael.wullenkord (at) dlr.deUNSPECIFIED
Jung, Christianchristian.jung (at) dlr.deUNSPECIFIED
Date:26 April 2015
Journal or Publication Title:Proceedings 1st International Solar Fuels Conference (ISF-1)
Refereed publication:No
Open Access:Yes
Gold Open Access:No
In ISI Web of Science:No
Page Range:E:Po-4
EditorsEmailEditor's ORCID iD
Keywords:Solar concentrator, SoCRatus, photo-electrochemistry, photochemistry, water Treatment, ray tracing
Event Title:1st International Solar Fuels Conference (ISF-1)
Event Location:Uppsala, Schweden
Event Type:international Conference
Event Dates:26. Apr. - 01. Mai 2015
Organizer:Swedish Consortium for Artificial Photosynthesis
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 - Solar Process Technology (old)
Location: Köln-Porz
Institutes and Institutions:Institute of Solar Research > Solare Verfahrenstechnik
Deposited By: Sattler, Prof. Dr. Christian
Deposited On:01 Jun 2015 11:11
Last Modified:31 Jul 2019 19:53

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