Microreactor for photocatalytic reactions
AssigneesFraunhofer-Gesellschaftzurförderung der angewandten Forschung e.V., Julius-Maximilians-UniversitäT WüRzburg
InventorsThomas Rehm, Anke Krüger
Life of this patent
Estimating the term…
Abstract
The present invention relates to a device for the photocatalytic reduction of a substance with a structured reaction plate and/or a structured housing, wherein the reaction plate has, at least in some regions, a surface which contains a material with negative electron affinity and which can be electronically excited with radiation having a wavelength of ≥180 nm.
Claims24
A device for photocatalytic reduction of a substance comprising
- at least one reactor housing with a reaction plate disposed therein,
- the reaction plate and/or the reactor housing having a structuring and being insulated electrically from each other,
- the reactor housing consisting, at least in regions, of a material which is transparent for radiation of a wavelength of ≥180 nm,
- and the reaction plate having, at least in regions, a surface which comprises a material with negative electron affinity and which can be excited electronically with radiation of a wavelength of ≥180 nm;
- wherein the structuring comprises at least one channel-like depression, wherein the at least one channel-like depression extends along a preferential flow direction of the liquid thin film.
A continuous method for photocatalytic reduction of a substance in a device comprising a reactor housing with reaction plate disposed therein,
- the reaction plate and/or the reactor housing having a structuring and being insulated electrically from each other,
- the reactor housing consisting, at least in regions, of a material which is transparent for radiation of a wavelength of ≥180 nm,
- and the reaction plate having, at least in regions, a surface which comprises a material with negative electron affinity and which can be excited electronically with radiation of a wavelength of ≥180 nm,
- in which
- a) a liquid and the substance to be reduced are introduced into the device such that a liquid thin film is formed on the surface of the reaction plate, through which the substance to be reduced diffuses,
- b) the reaction plate is irradiated with light of a wavelength of ≥180 nm so that electrons are excited and emitted from the surface of the material with negative electron affinity, and
- c) the electrons reduce the substance to be reduced which diffuses through the liquid thin film.
Dependencies are inferred from the claim text.