TiO.sub.2 -coated fiber optic cable reactor

Chemical apparatus and process disinfecting – deodorizing – preser – Chemical reactor – With means applying electromagnetic wave energy or...

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

422186, C02F 130, C02F 132

Patent

active

058753842

ABSTRACT:
A photochemical reactor system employing an optical fibers in the form of a cable to transmit light to solid-supported TiO.sub.2 -containing photocatalyst is disclosed. Light energy is transmitted to TiO.sub.2 -containing particles, chemically anchored onto one or more quartz fiber cores, via radial refraction of light out of each fiber. TiO.sub.2 -containing coating layer minimizes the interfacial surface area of the quartz core and TiO.sub.2 -containing particles and operation with incident irradiation angles near 90.degree. enhance light propagation along the fibers. A maximum quantum efficiency of .phi.=1.1% for the oxidation of 4-chlorophenol was achieved. Fiber efficiency permits the light source to be separated from the photocatalyst.

REFERENCES:
patent: 5035784 (1991-07-01), Anderson et al.
patent: 5118422 (1992-06-01), Cooper et al.
patent: 5137607 (1992-08-01), Anderson et al.
patent: 5262066 (1993-11-01), Van Soye et al.
patent: 5302356 (1994-04-01), Shadman et al.
patent: 5308454 (1994-05-01), Anderson
patent: 5374405 (1994-12-01), Firnberg et al.
patent: 5468699 (1995-11-01), Zhang et al.
patent: 5531969 (1996-07-01), Tamme et al.
Peill, Nicola J. and Hoffman, Michael R., "Development and Optimization of TiO.sub.2 --Coated Fiber-Optic Cable Reactor: Photocatalytic Degradation of 4-Chlodphenol." Environ. Sci. Technol. 1995, 29, 2974-2981, Sep. 1, 1995.
Hoffman, M.R.; Martin, S.T.; Choi, W.; Bahnernann, D.W.; "Environmental Applications of Semiconductor Photocatalysis", Chemical Reviews 1995, 95, 69-96.
Abdullah, M.; Low, G.K.C.; Matthews, R.; "Effects of Common Inorganic Anions on Rates of Photocatlytic Oxidation of Organic Carbon over Illuminated Titanium Dioxide", J. Phys. Chem. 1990, 94, pp. 6820-6825.
Kormann, C.; Bahnemann, D. W.; Hoffmann, M.R.; "Preparation and Characterization of Quantum-Size Titanium Dioxide", J. Phys. Chem. 1988, 92, 5196.
Kormann, C.; Bahnemann, D. W.; Hoffmann, M.R.; "Photolysis of Chloroform and Other Organic Molecules in Aqueous TiO.sub.2 Suspensions", Environ. Sci. Tech. 1991, 25, 494-500.
Prairie, M.R.; Evans, L.R.; Stange, B.M.; Martinez, S.L.; "An Investigation of TiO.sub.2 Photocatalysis for the Treatment of Water Contaminated with Metals and Organic Chemicals", Environ. Sci. Tech. 1993, 1776-1782.
Sabate, J; Anderson, M.A.; Aguiado, M.A.; Gimenez, J.; Ccervera-March, S.; Hill, C.G.; J. Mol. Catal. 1992, 71, 57.
Herrmann, J.M.; Disdier, J.; Pichat, P.; "Photoassisted Platinum Deposition on TiO.sub.2 Powder Using Various Platinum Complexes", J. Phys. Chem. 1986, 90, No. 22, 6028-6034.
Erbs, W.; Desilvestro, J.; Borgarello, E.; Gratzel, M.; "Visible-Light-Induced O.sub.2 Generation from Aqueous Dispersions of WO.sub.3", J. Phys. Chem. 1984, 88, 4001-4006.
Matthews, R. W.; Wat. Res. 1986, 20, 569.
Pelizzetti, E.; Carlin, V.; Minero, C.; Gratzel, M.; "Enhancement of the Rate of Photocatalytic Degradation on TiO.sub.2 of 2-Chlorophenol, 2,7-Dichlorodibenzodioxin and Atrazine by Inorganic Oxidizing Species", New J. Chem. 1991, 15, 351-359.
Hoffman, A.J.; Yee, H.; Mills, G.; Hoffmann, M.R.; "Photoinitiated Polymerization of Methyl Methacrylate Using O-Sized ZnO Colloids", Journal Physical Chemistry 1992, 96, 5540-5546.
Choi, W.; Termin, A.; Hoffmann, M.R.; "The Role of Metal Ion Dopants in Quantum-Sized TiO.sub.2 : Correlation between Photoreactivity and Charge Carrier Recombination Dynamics", The Journal of Physical Chemistry, Jul. 15, 1994, pp. 13669-13679.
Fox, M.A.; "Photoinduced Electron Transfer", Photochem. Photobiol. vol. 52, No. 3, 1990, 617-627.
Matthews, R.W.; "Kinetics of Photocatalytic Oxidation of Organic Solutes over Titanium Dioxide", J. Catal. 1988, 111, 264-272.
Turchi, C.S.; Ollis, D.F.; "Photocatalytic Degradation of Organic Water Contaminants: Mechanisms Involving Hydroxyl Radical Attack", J. Catal. 1990, 122, 178-192.
Yamazaki-Nishida, S.; Nagano, K.J.; Phillips, L.A.; Cervera-March, S.; Anderson, M.A.; "Photocatalytic Degradation of Trichloroethylene in the Gas Phase Using Titanium Dioxide Pellets", J. Photochem. Photobiol. A: Chem. 1993, 70, 95-99.
Xu, Y.M.; Menassa, P.E.; Langford, C.H.; "Photodecomposition of Several Chloroaromatics Using A Commercial Prototype Reactor", Chemosphere 1988, 17, 1971-1976.
Wyness, P.; Klausner, J.F.; Goswami, D.Y.; Schanze, K.S.; "Performance of Nonconcentrating Solar Photocatalytic Oxidation Reactors, Part I: Flat-Plate Configuration", J. Solar Engy. Engi. Trans. ASME 1994, 116, 2-7.
Dibble, L.A.; Raupp, G.B.; "Fluidized-Bed Photocatalytic Oxidation of Trichloroethylene in Contaminated Airstreams", Environ. Sci. Tech. 1992, 26, 492-495.
Peral, J.; Ollis, D.F.; "Heterogeneous Photocatalytic Oxidation of Gas-Phase Organics for Air Purification: Acetone, 1-Butanol, Butyraldehyde, Formaldehyde, and m-Xylene Oxidation", J. Catal. 1992, 136, 554-565.
Yue, P.L.; Khan, F.; Rizzuti, L.; "Photocatalytic Ammonia Synthesis in a Fluidised Bed Reactor", Chem. Eng. Sci. 1983, 38, 1893-1900.
Ollis, D.F.; Marinangeli, R.E.; "Photoassisted Heterogenious Catalysis with Optical Fibers"; AIChE Journal , Jul. 1977. vol. 23, pp.415-424.
Ollis, D.F.; Marinangeli, R.E.; "Photo-Assisted Heterogeneous Catalysis with Optical Fiblers--II. Nonisothermal Single Fiber and Fiber Bundle", AIChE J., Nov. 1980, vol. 26, No. 6, pp. 1000-1006.
Hofstadler, K.; Bauer, R.; Novalic, S.; Heisler, G.; "New Reactor Design for Photocatalytic Wastewater Treatment with TiO.sub.2 Immobilized on Fused-Silica Glass Fibers: Photomineralization of 4-Chlorophenol"; Environ. Sci. Tech. 1994, 28, pp. 670-674.
Gapen, D.C.; "Photocatalytic Degradation of Chlorinated Hydrocarbons", Thesis for M.S. (Chemical Engineering), University of Wisconsin, Madison, Wisconsin 1991.
Xu, Q.Y.; Anderson, M.A.; "Synthesis of Porosity Controlled Ceramic Membranes", J. Mat. Res. 1991, 6, 1073-1081.
Hu, L.L.; Yoko, T.; Kozuka, H. Sakka, S.; "Effects of Solvent on Properties of Sol-gel-derived TiO.sub.2 Coating Films", Thin Solid Films 1992, 219, 18-23.
Aluminium Oxide C, Titanium Dioxide P 25-Two Highly Dispersed Metallic Oxides from Degussa Produced by the AEROSIL.RTM.-Process, Degussa Technical Bulletin, 1990, No. 56.
Heller, H.G.; Langan, J.R.; "Photochromic Heterocyclic Fulgides. Part 3. The Use of (E)-.alpha.-(2,5-Dimethyl-3-furylethylidene) (isopropylidene) succinic Anhydride as a Simple Convenient Chemical Actinometer", J. Chem. Soc. Perkin Trans. 1981, 2, 341-343.
Mills, A.; Morris, S.; "Photomineralization of 4-chlorophenol Sensitized by Titanium Dioxide: A Study of the Initial Kinetics of Carbon Dioxide Photogeneration", J. Photochem. Photobiol. A: Chem. 71, 1993, 75-83.
Bruno, W.M.; "Powder Core Dielectric Waveguides," California Institute of Technology, Jan. 31, 1986, pp. 145-167.
Bickley, R.I.; Gonzalez-Caffeno, T.; Lees, J.S.; Palmisano, L.; Tilley, R.J.D.; "A Structural Investigation of Titanium Dioxide Photocatalysts", J. Solid State Chem. 1991, vol. 92, pp. 178-190.
Aguado, M.A.; Anderson, M.A.; Hill, C.G.; Influence of light intensity and membrane properties on the photocatalytic degradation of formic acid over TiO.sub.2 ceramic membranes; Journal of Molecular Catalysis, 1994, vol. 89, pp. 165-178.
Orgaz, F.; Capel, F.; "A Semi-empirical Model for Coating Flat Glass by Dipping into Metal-organic Solutions", J. Mat. Sci. 1987, 22, 1291-1294.
Tseng, J.M.; Huang, C. P.; "Removal of Chlorophenols From Water by Photocatalytic Oxidation", Wat. Sci. Tech. 1991, 23, 377-387.
Al-Sayyed, G.; D'Oliveira, J.C.; Pichat, P.; "Semiconductor-sensitized photodegradation of 4-chlorophenol in Water", J. Photochem. Photobiol. A: Chem. 1991, vol. 58, pp. 99-114.
Albery, W.J.; Brown, G.T.; Darwent, J.R.; Saievar-Iranizad, E.; "Time-resolved Photoredox Reactions of Colloidol CdS", J. Chemi. Soci. Farad. Trans. I, 1985, vol. 81, pp. 1999-2007.
Mills, G.; Hoffmann, M.R.; "Photocatalytic Degradation of Pentachlorophenol on TiO.sub.2 Particles: Identification of Intermediates and Mechanism of Reaction", Environ. Sci. Tech. 1993, 27, 1681-1689.
Martin, S.T.; Morrison, C.L.; Hoffmann, M.R.; "Photochemical Mechanism of Size-Quantized Vanadium-Doped TiO.sub.2 Particle

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

TiO.sub.2 -coated fiber optic cable reactor does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with TiO.sub.2 -coated fiber optic cable reactor, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and TiO.sub.2 -coated fiber optic cable reactor will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-315363

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.