Download photoreactor

Author: m | 2025-04-24

Download PhotoReactor Application. What is PhotoReactor Application? How popular is the PhotoReactor Application software and how to download it? We have collected thousands of 3. Photoreactor Choose the appropriate standard photoreactor. From batch to semi-batch through to conti-flow operation, we supply the entire range as standard photoreactors. This includes side-loop photoreactors, falling-film photoreactors, agitated photoreactors and plug-flow photoreactors.

TAK120-LC - Photoreactors - Photoreactor Liquid-Cooled By Photoreactor

Another electrode configured as a cathode. The electrode in the outlet chamber 20 is diagrammatically shown at 18, and the flow distributor 16 may define the electrode in the inlet chamber 12. Claims (14) What is claimed is: 1. A photoreactor comprising radiation-permeable tubes through which a reaction medium is flowable and which are irradiated with light from outside, wherein the tubes extend from an inlet chamber provided with a fluid inlet,said inlet chamber including a flow distributor that distributes the reaction fluid from said fluid inlet to inlet ends of said tubes, and wherein the flow distributor is a bulkhead provided with holes that are arranged in an offset manner relative to said inlet ends of the tubes. 2. The photoreactor according to claim 1, wherein the tubes are capillary tubes having a wall thickness amounting to at least 10% of the inner diameter. 3. The photoreactor according to claim 1, wherein the tubes have a wall thickness amounts to at least 10% of the inner diameter. 4. The photoreactor according to claim 1, wherein the tubes define an elongate tube bundle extending between the inlet chamber and an outlet chamber, the dimension of said tube bundle being equal to or larger than a value of twice the outer diameter of one of the tubes as seen in the direction of light radiation. 5. The photoreactor according to claim 4, wherein the tubes are arranged in planar layers. 6. The photoreactor according to claim 4, wherein there is provided a mirror surface extending parallel to the tube bundle. 7. The photoreactor according to claim 4, wherein ends of the tubes are embedded in a wall of the inlet chamber and/or the outlet chamber. 8. The photoreactor according to claim 4, wherein inside or outside the tube bundle a radiation source is arranged which supplies the radiation required for the photoreaction. 9. The photoreactor according to claim 4, wherein the tube bundle as well as the inlet chamber and the outlet chamber are combined to form a self-supporting structure defining a module for use a larger solar treatment plant. 10. The photoreactor according to claim 1, wherein the inner surfaces of the tubes are provided with a coating. 11. The photoreactor according to claim 1, wherein the inlet chamber and/or an outlet chamber comprise an electrode configured as an oxygen-reducing cathode, and another electrode configured as an anode. 12. The

Photoreactors for screening - Photoreactors - Photochemistry

Photoreactor according to claim 1, wherein the inlet chamber and/or an outlet chamber comprise an electrode configured as a chloride-oxidizing anode, and another electrode configured as a cathode. 13. The photoreactor according to claim 11, wherein the flow distributor defines one of the electrodes. 14. The photoreactor according to claim 1, wherein the flow distributor is configured as a static mixer. US11/816,687 2005-02-19 2006-02-16 Photoreactor Active 2030-12-10 US8753579B2 (en) Applications Claiming Priority (7) Application Number Priority Date Filing Date Title DE200510007771 DE102005007771A1 (en) 2005-02-19 2005-02-19 Photo-reactor for solar detoxification and decontamination systems, e.g. for polluted water, comprises a bundle of transparent capillary tubes of specified inside diameter, irradiated with light and carrying a reaction medium DE102005007771.4 2005-02-19 DE102005007771 2005-02-19 WOPCT/EP2006/050400 2006-01-24 EPPCT/EP2006/050400 2006-01-24 EP2006050400 2006-01-24 PCT/EP2006/060006 WO2006087353A1 (en) 2005-02-19 2006-02-16 Photoreactor Publications (2) Publication Number Publication Date US20080299017A1 US20080299017A1 (en) 2008-12-04 US8753579B2 true US8753579B2 (en) 2014-06-17 Family ID=36390284 Family Applications (1) Application Number Title Priority Date Filing Date US11/816,687 Active 2030-12-10 US8753579B2 (en) 2005-02-19 2006-02-16 Photoreactor Country Status (4) Country Link US (1) US8753579B2 (en) EP (1) EP1848528B1 (en) AT (1) ATE513614T1 (en) WO (1) WO2006087353A1 (en) Cited By (2) * Cited by examiner, † Cited by third party Publication number Priority date Publication date Assignee Title US11779898B2 (en) 2017-06-27 2023-10-10 Syzygy Plasmonics Inc. Photocatalytic reactor system US11883810B2 (en) 2017-06-27 2024-01-30 Syzygy Plasmonics Inc. Photocatalytic reactor cell Families Citing this family (12) * Cited by examiner, † Cited by third party Publication number Priority date Publication date Assignee Title EP2017249A1 (en) * 2007-07-19 2009-01-21 Total Petrochemicals Research Feluy Process for the selective oxidation of methane DE102007057869B3 (en) * 2007-11-29 2009-04-02 W.C. Heraeus Gmbh Quartz glass microphotoreactor and synthesis of 10-hydroxycamptothecin and 7-alkyl-10-hydroxycamptothecin DE102008022406A1 (en) * 2008-05-06 2009-11-12 Hengst Gmbh & Co.Kg Method and device for separating water from fuel JP5656872B2 (en) * 2009-01-21 2015-01-21 ビーエーエスエフ ソシエタス・ヨーロピアＢａｓｆ Ｓｅ Tube bundle reactor for non-catalytic or homogeneous catalysis reactions CN102557182A (en) * 2012-02-13 2012-07-11 甘肃省科学院自然能源研究所 Multifunctional solar photocatalytic waste water treatment apparatus used for pilot tests GB2529042A (en) * 2014-08-06 2016-02-10 Greenthread Ltd Apparatus and methods for water treatment US20190161367A1 (en) * 2016-04-14 2019-05-30 Portland State University Rotationally symmetric photoanalytic reactor for water purification CN106673123B8 (en) * 2016-09-30 2019-07-26 河海大学 Reactor and its operation process are repaired in integrated oil sewage photocatalysis WO2018211820A1 (en) * 2017-05-18 2018-11-22 日本電気株式会社 Object, device, and processing method WO2021026339A1 (en) 2019-08-06 2021-02-11 Snapdragon Chemistry, Inc. Continuous flow photoreactor

Parallel Screening Photoreactor - Photoreactors - Photochemistry

All flow rates.The system also enables targeted control of conversion rates and detailed analysis of reaction kinetics, which facilitates the monitoring and optimization of reactions. The design of the reactor also ensures an even distribution of residence time, which is crucial for many photochemical processes. Another significant advantage is the intensive mass transfer within the tubes, which increases the efficiency of the reactions. The photoreactor can be operated under laminar, turbulent and hydrodynamic conditions with plug flow. The materials used in the reactor are chemically neutral and resistant, which ensures a long service life and reliability in various chemical environments. In addition, the photoFLOW reactor with its different tube diameters and the possibility of adapting the length of the reaction zone to the specific requirements of the process offers a wide range of applications. Typical applicationsActive pharmaceutical intermediates (API), e.g. synthesis of antimalarial drug made, singlet oxygen reactionAPI and intermediate synthesis (e.g. Iribotecan by Cis-Trans Isomerization and antimalarial drug by Singlet Oxygen Reaction)API carriers and particle modificationsAPI synthesisProduction of VitaminsBrominated intermediates for synthesisChlorinated intermediates for synthesisFluorinations, Sulfoxidations, NitrosylationsFragrancesPlant treatment intermediatePolymer functionalizationPreparative photochemistry in general implying strongly absorbing substrates and/or radical imtermediatesSafety agents Contact us Easy scalable tube photoreactor It is a ground-breaking system that can be easily scaled up to a commercial level for the first time, which was previously not possible with tubular reactors. Using this innovative technology, all the necessary laboratory parameters can be investigated to enable successful upscaling. Researchers can use this laboratory system to precisely determine. Download PhotoReactor Application. What is PhotoReactor Application? How popular is the PhotoReactor Application software and how to download it? We have collected thousands of

Side-Loop Photoreactors - Photoreactors - Photochemistry

US8753579B2 - Photoreactor - Google Patents Photoreactor Download PDF Info Publication number US8753579B2 US8753579B2 US11/816,687 US81668706A US8753579B2 US 8753579 B2 US8753579 B2 US 8753579B2 US 81668706 A US81668706 A US 81668706A US 8753579 B2 US8753579 B2 US 8753579B2 Authority US United States Prior art keywords tubes photoreactor photoreactor according inlet inlet chamber Prior art date 2005-02-19 Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.) Active, expires 2030-12-10 Application number US11/816,687 Other versions US20080299017A1 (en Inventor Christian Sattler Christian Jung Hans-Jürgen Bigus Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.) Hirschmann Laborgerate & Co KG GmbH Hirschmann Laborgerate GmbH and Co KG Deutsches Zentrum fuer Luft und Raumfahrt eV Original Assignee Hirschmann Laborgerate & Co KG GmbH Deutsches Zentrum fuer Luft und Raumfahrt eV Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) 2005-02-19 Filing date 2006-02-16 Publication date 2014-06-17 2005-02-19 Priority claimed from DE200510007771 external-priority patent/DE102005007771A1/en 2006-02-16 Application filed by Hirschmann Laborgerate & Co KG GmbH, Deutsches Zentrum fuer Luft und Raumfahrt eV filed Critical Hirschmann Laborgerate & Co KG GmbH 2008-05-27 Assigned to DEUTSCHES ZENTRUM FUR LUFT-UND RAUMFAHRT E.V., HIRSCHMANN LABORGERATE GMBH & CO. KG reassignment DEUTSCHES ZENTRUM FUR LUFT-UND RAUMFAHRT E.V. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BIGUS, HANS-JURGEN, JUNG, CHRISTIAN, SATTLER, CHRISTIAN 2008-12-04 Publication of US20080299017A1 publication Critical patent/US20080299017A1/en 2014-06-17 Application granted granted Critical 2014-06-17 Publication of US8753579B2 publication Critical patent/US8753579B2/en Status Active legal-status Critical Current 2030-12-10 Adjusted expiration legal-status Critical Links USPTO USPTO PatentCenter USPTO Assignment Espacenet Global Dossier Discuss 239000012530 fluid Substances 0.000 claims abstract description 48 230000005855 radiation Effects 0.000 claims abstract description 14 239000012429 reaction media Substances 0.000 claims abstract description 10 238000006243 chemical reaction Methods 0.000 claims description 7 239000011248 coating agent Substances 0.000 claims description 6 238000000576 coating method Methods 0.000 claims description 6 230000003068 static effect Effects 0.000 claims description 2 230000009969 flowable effect Effects 0.000 claims 1 230000000258 photobiological effect Effects 0.000 abstract description 3 QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 9 239000001301 oxygen

Falling-Film Photoreactors - Photoreactors - Photochemistry

Titanium dioxide, for example, are used, result in an inefficient utilization of the emitted photons in the prior-art solar reactor configurations. The known solar tube reactors are further disadvantageous in that they are operated at a high velocity with a turbulent flow for preventing sedimentation of turbid substances and/or suspended photocatalysts. The agitation of the entire fluid flow at a high velocity results in a relatively high energy consumption for driving pumps. It would be of advantage to the economic efficiency and the ecobalance of a solar photoreactor plant if only a smaller portion of the fluid had to be placed in turbulence. A photoreactor described in U.S. Pat. No. 4,456,512 A comprises an inlet chamber provided with a fluid inlet, from which inlet chamber a bundle of capillary tubes extends. The capillary tubes extend through a room in which a plasma is produced. The outer wall of this room is cooled. In the reaction fluid passing through the capillary tubes photochemical reactions take place. A similar photoreactor is described in U.S. Pat. No. 3,554,887. Here, the tubes are connected with an inlet chamber and an outlet chamber. Inside the tube system a light source is arranged which produces the light required for the photoreaction. SUMMARY OF THE INVENTION The present invention provides a higher-efficiency photoreactor for photochemical or photobiological reactions, such as syntheses, cleaning, disinfecting and treatment operations. More particularly, the present invention provides a photoreactor comprising radiation-permeable tubes through which a reaction medium is adapted to flow and which are irradiated with light from outside. The tubes extend from an inlet chamber provided with a fluid inlet and a flow distributor that distributes the reaction fluid from the fluid inlet to the tubes. The flow distributor is a bulkhead provided with holes arranged in an offset manner relative to the inlet ends of the tubes. Accordingly, the inlet chamber is provided with a flow distributor which distributes the reaction medium from the fluid inlet to the tubes. The flow distributor allows for a smaller volume of the inlet chamber. Thereby the portion of the reaction medium volume, which is not irradiated, is reduced. Due to the small fluid portion which is not irradiated and thus does not react in terms of pure photoreactions, the processes induced by light lead to comparably more rapid material changes in the entire fluid and/or to more rapid concentration changes. Due to the

Plug-Flow Tube Photoreactors - Photoreactors

For both the required electrical energy and cooling processes. the illuminants are comparably expensive and have a short service life. the high illuminant temperatures produced during operation, the high electrical voltages and power as well as the frequently used toxic constituents, such as mercury vapor, further entail a high expenditure for safety equipment. Multi-ribbed plate reactors which do not concentrate light, in particular double-ribbed plate reactors made of an extruded translucent plastic material (EP 0 738 686 A1) and so-called CPC reactors (compound parabolic collectors) (for example J. I. Ajona, A. Vidal, The Use of CPC collectors for Detoxification of Contaminated Water; Design, Construction and Preliminary Results, Solar Energy 68 (2000) 109-120), have been developed and put to test for solar detoxification of contaminated waste waters. CPC reactors compound parabolic collectors Line- and point-focusing concentrators have also been used for solar detoxification (DE 434 41 63 A1). these concentrators only utilize the direct radiation and not the diffuse radiation of the sun which contains a particularly large amount of UV light. the light concentration leads to more rapid concentration changes than non-concentrated sunlight, the reactor-related solar photon yield is comparably small, and the treatment costs are correspondingly high due to the comparably high investment costs. a general drawback of the prior art is the very small reactor-related solar photon yield. the scattering losses which occur when suspensions of finely dispersed photocatalysts on the basis of titanium dioxide, for example, are used, result in an inefficient utilization of the emitted photons in the prior-art solar reactor configurations. the known solar tube reactors are further disadvantageous in that they are operated at a high velocity with a turbulent flow for preventing sedimentation of turbid substances and/or suspended photocatalysts. a photoreactor described in U.S. Pat. No. 4,456,512 A comprises an inlet chamber provided with a fluid inlet, from which inlet chamber a bundle of capillary tubes extends. the capillary tubes extend through a room in which a plasma is produced. The outer wall of this room is cooled. In the reaction fluid passing through the capillary tubes photochemical reactions take place. the present invention provides a higher-efficiency photoreactor for photochemical or photobiological reactions, such as syntheses, cleaning, disinfecting and treatment operations. the present invention provides a photoreactor comprising radiation-permeable tubes through which a reaction medium is adapted to flow and which are irradiated with light from outside. the tubes extend from an inlet

Photoreactors - Photochemistry Product range of photoreactors

Treatment Non-Patent Citations (1) * Cited by examiner, † Cited by third party Title Lovergrove K et al.: "Endothermic Reactors for an Ammonia Based Thermo-chemical Solar Energy Storage and Transport System," Solar Energy, Pergamon Press. Oxford, GB Bd. 56, NR. 4, Apr. 1996. Cited By (3) * Cited by examiner, † Cited by third party Publication number Priority date Publication date Assignee Title US11779898B2 (en) 2017-06-27 2023-10-10 Syzygy Plasmonics Inc. Photocatalytic reactor system US11883810B2 (en) 2017-06-27 2024-01-30 Syzygy Plasmonics Inc. Photocatalytic reactor cell US11890606B2 (en) * 2017-06-27 2024-02-06 Syzygy Plasmonics Inc. Photocatalytic reactor having multiple photocatalytic reactor cells Also Published As Publication number Publication date EP1848528A1 (en) 2007-10-31 ATE513614T1 (en) 2011-07-15 US20080299017A1 (en) 2008-12-04 WO2006087353A1 (en) 2006-08-24 EP1848528B1 (en) 2011-06-22 Similar Documents Publication Publication Date Title US8753579B2 (en) 2014-06-17 Photoreactor US6633042B1 (en) 2003-10-14 Solar photoreactor Al-Ekabi et al. 1988 Kinetics studies in heterogeneous photocatalysis. I. Photocatalytic degradation of chlorinated phenols in aerated aqueous solutions over titania supported on a glass matrix EP1913965B1 (en) 2012-02-22 Photolytic apparatus for oxygenating and removing carbon dioxide Dillert et al. 1999 Large scale studies in solar catalytic wastewater treatment AU2010315119B2 (en) 2015-02-05 Photochemical purification of fluids US5116582A (en) 1992-05-26 Photocatalytic slurry reactor having turbulence generating means CA2030827A1 (en) 1991-10-28 Reactor vessel using metal oxide ceramic membranes Abhang et al. 2011 Design of photocatalytic reactor for degradation of phenol in wastewater JP5074212B2 (en) 2012-11-14 Photoreactor US7527770B2 (en) 2009-05-05 Photolytic oxygenator with carbon dioxide fixation and separation Bousselmi et al. 2004 Textile wastewater treatment and reuse by solar catalysis: results from a pilot plant in Tunisia Gimenez et al. 1997 Reactor modelling in the photocatalytic oxidation of wastewater AU713011B2 (en) 1999-11-18 Reactors for photocatalytic waste water purification with multiribbed plates as solar elements CN108529715A (en) 2018-09-14 A kind of emissive type artificial aquatic weed light catalytic purifying case CN110104756A (en) 2019-08-09 A kind of photocatalysis sewage degradation reaction device CN107226511A (en) 2017-10-03 A kind of ultra violet sterilizer KR200398372Y1 (en) 2005-10-12 A Floating Type Water Purifying System JP2003284946A (en) 2003-10-07 Photocatalyst reaction device and unit therefor CN104556294B (en) 2016-06-01 A kind of can modularization assembling board-like photocatalytic reaction device and method US11975990B2 (en) 2024-05-07 Photoreactor and formulations for environmental remediation and methods of use thereof US20210355001A1 (en) 2021-11-18 Method and appartus for producing hydroxyl radicals JP2003200178A (en) 2003-07-15 Water treatment apparatus utilizing photocatalyst JP2000061458A (en) 2000-02-29 Device for purifying and activating sewage or the like JPH11151486A (en). Download PhotoReactor Application. What is PhotoReactor Application? How popular is the PhotoReactor Application software and how to download it? We have collected thousands of

Plug-Flow Tube Photoreactors - Photoreactors - Photochemistry

Allows numerous modules to be installed one beside the other thus creating an extensible photoreactor plant. the tube bundle 10 is arranged in a continuous trough 30 which comprises longitudinal hook sections 31 for hooking into corresponding holding fixtures. the trough 30 supports the capillary tubes over their overall length. the bottom of the trough as well as the side walls may be provided with a radiation-reflecting coating. It is further possible to produce the trough 30 from a transparent material for the purpose of illuminating said trough from the sides or from below. the inlet chamber 12 and/or an outlet chamber 20 may comprise an electrode configured as a chloride-oxidizing anode, and another electrode configured as a cathode. the electrode in the outlet chamber 20 is diagrammatically shown at 18 , and the flow distributor 16 may define the electrode in the inlet chamber 12 . Landscapes Chemical & Material Sciences (AREA) Chemical Kinetics & Catalysis (AREA) Organic Chemistry (AREA) Toxicology (AREA) Health & Medical Sciences (AREA) Hydrology & Water Resources (AREA) Water Supply & Treatment (AREA) Environmental & Geological Engineering (AREA) Engineering & Computer Science (AREA) Life Sciences & Earth Sciences (AREA) Dispersion Chemistry (AREA) Physics & Mathematics (AREA) Electromagnetism (AREA) General Health & Medical Sciences (AREA) Physical Or Chemical Processes And Apparatus (AREA) Abstract The photoreactor comprises a tube bundle (10) made up of numerous capillary tubes (11) through which a reaction medium flows. The tubes (11) are transparent. Solar radiation or artificial radiation acts upon the reaction medium for effecting a photochemical or photobiological treatment. The inlet chamber (12) connected with the tube bundle (10) comprises a flow distributor (16) which distributes the reaction medium from the fluid inlet (15) to the tubes (11). The flow distributor (16) allows for a smaller volume of the inlet chamber (12). The reactor volume, which is not irradiated, is thus reduced, and the efficiency of the rector is enhanced. Description The invention relates to a photoreactor comprising radiation-permeable tubes through which a reaction medium is adapted to flow and which are irradiated with light from outside, wherein the tubes extend from an inlet chamber having a fluid inlet. BACKGROUND For detoxification and/or degermination of fluids contaminated by pollutants or microorganisms, photochemical or photobiological processes are developed. In all these processes oxygen-rich species, such as singlet oxygen, hydroxyl or other oxygen-rich radicals or other strongly oxidizing intermediates, are produced by

Bio-photoreactor schematic diagrams. A) Bio-photoreactor with

Chamber provided with a fluid inlet and a flow distributor that distributes the reaction fluid from the fluid inlet to the tubes. the flow distributor is a bulkhead provided with holes arranged in an offset manner relative to the inlet ends of the tubes. Accordingly, the inlet chamber is provided with a flow distributor which distributes the reaction medium from the fluid inlet to the tubes. the flow distributor allows for a smaller volume of the inlet chamber. Thereby the portion of the reaction medium volume, which is not irradiated, is reduced. Due to the small fluid portion which is not irradiated and thus does not react in terms of pure photoreactions, the processes induced by light lead to comparably more rapid material changes in the entire fluid and/or to more rapid concentration changes. Due to the smaller volume of the inlet chamber and the adjacent tubes, the volume of the overall photoreactor is small. The uniform distribution of the reaction medium to the tubes results in a high efficiency of the photoreactor since the fluid volume is smaller and the treatment intensity is enhanced. Further, the flow distributor decelerates the flow velocity in the tubes. If the tube inner wall is coated with a catalyst or any other material, said coating is washed off to a smaller extent due to the reduced flow velocity. the flow distributor may further be configured as a static mixer for uniformly distributing auxiliary substances, such as photocatalysts, air, oxygen, hydrogen peroxide or other oxidants, to the tubes. auxiliary substances such as photocatalysts, air, oxygen, hydrogen peroxide or other oxidants the flow distributor may be a plate around which a fluid flows, said plate being arranged between the fluid supply and the inlet ends of the capillaries. the flow distributor is configured as a bulkhead provided with holes. the holes are arranged in a offset manner relative to the inlet ends of the tubes. the tubes are capillary tubes and have a wall thickness of at least 10% of the inner diameter. the capillary tubes have an inner diameter of less than 10 mm. The use of capillary tubes results in a further reduction of the volume of the reactor or the reactor circuit. capillary tubes and/or capillary tube bundles through which a fluid flows, portions of the emitted light do not impinge directly in the same collector plane upon the flowing fluid. This. Download PhotoReactor Application. What is PhotoReactor Application? How popular is the PhotoReactor Application software and how to download it? We have collected thousands of

Flow Photoreactors - Photoreactors - Photochemistry - Peschl Inc

Purpose of realizing a hybrid operation, i.e. operation optionally with solar energy or with the artificial illuminant. a hybrid operation i.e. operation optionally with solar energy or with the artificial illuminant. Another embodiment relates to embedding of electrical fields between the capillaries by means of electrodes. constant or slower alternating fields may be used for supporting the photochemical charge separation in semiconductor materials. the electrical fields can be generated by introducing electrodes into the capillaries, or by producing the capillaries from a transparent electrode material, or by applying an outer and/or preferably an inner coating of a transparent electrode material to the capillaries, in combination with a counter electrode located inside or outside the capillary. oxidants such as hydrogen peroxide the flow distributor may be configured as a large-surface electrode, and a small-surface counter electrode can be arranged between the flow distributor and the capillaries, for example, in the form of a quasi-split electrochemical cell. This allows a precise in-situ dosing and distribution of any required oxidant. the voltage required for operating the electrodes is obtained through photovoltaic modules arranged below the capillaries in the bottom portion of the reactor. One embodiment may comprise elastic perforated plates into which the ends of the capillaries are inserted. These capillaries are pressed against the inlet and/or outlet chamber with the aid of plates for obtaining a sealing surface between the chambers and the tubes. the capillaries may further be sealed by casting them integral with/fusing them into a suitable plastic block which, in turn, is pressed into the inlet or the outlet chamber with or without sealing. FIG. 1 shows a longitudinal section of a first embodiment of the photoreactor FIG. 2 shows a cross section along line II-II of FIG. 1 . FIG. 3 shows a schematic cross section of a second embodiment. the photoreactor shown in FIGS. 1 and 2 comprises a tube bundle 10 defined by numerous elongate parallel capillary tubes 11 made a of radiation-permeable material, in particular a transparent material, such as quartz glass. a transparent material such as quartz glass. the one ends of the capillary tubes 11 are connected to an inlet chamber 12 . Said inlet chamber forms part of a housing 13 made of a plastic material, for example. the ends of the capillary tube bundle are potted into the front wall 14 of the housing 13 such that the front wall 14