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Title: Photocatalytic reactor

Abstract

A photocatalytic reactor is described for processing selected reactants from a fluid medium comprising at least one permeable photocatalytic membrane having a photocatalytic material. The material forms an area of chemically active sites when illuminated by light at selected wavelengths. When the fluid medium is passed through the illuminated membrane, the reactants are processed at these sites separating the processed fluid from the unprocessed fluid. A light source is provided and a light transmitting means, including an optical fiber, for transmitting light from the light source to the membrane. 4 figs.

Inventors:
; ;
Publication Date:
Sponsoring Org.:
USDOE, Washington, DC (United States)
OSTI Identifier:
337878
Patent Number(s):
US 5,862,449/A/
Application Number:
PAN: 8-974,421
Assignee:
Dept. of Energy, Washington, DC (United States) PTO; SCA: 320303; 400500; PA: EDB-99:050080; SN: 99002064419
Resource Type:
Patent
Resource Relation:
Other Information: PBD: 19 Jan 1999
Country of Publication:
United States
Language:
English
Subject:
32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 40 CHEMISTRY; CHEMICAL REACTORS; PHOTOLYSIS; CATALYSTS; MEMBRANES; DESIGN; SEPARATION PROCESSES; LIGHT SOURCES; LIGHT TRANSMISSION; OPTICAL FIBERS

Citation Formats

Bischoff, B.L., Fain, D.E., and Stockdale, J.A.D. Photocatalytic reactor. United States: N. p., 1999. Web.
Bischoff, B.L., Fain, D.E., & Stockdale, J.A.D. Photocatalytic reactor. United States.
Bischoff, B.L., Fain, D.E., and Stockdale, J.A.D. 1999. "Photocatalytic reactor". United States. doi:.
@article{osti_337878,
title = {Photocatalytic reactor},
author = {Bischoff, B.L. and Fain, D.E. and Stockdale, J.A.D.},
abstractNote = {A photocatalytic reactor is described for processing selected reactants from a fluid medium comprising at least one permeable photocatalytic membrane having a photocatalytic material. The material forms an area of chemically active sites when illuminated by light at selected wavelengths. When the fluid medium is passed through the illuminated membrane, the reactants are processed at these sites separating the processed fluid from the unprocessed fluid. A light source is provided and a light transmitting means, including an optical fiber, for transmitting light from the light source to the membrane. 4 figs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 1999,
month = 1
}
  • Organic pollutants and bioaerosols in a gaseous stream are oxidized by exposure to light (e.g., UV light) in the presence of semiconductor catalyst particles or coatings supported on flexible strips suspended in the gaseous stream. 3 figs.
  • Organic pollutants and bioaerosols in a gaseous stream are oxidized by exposure to light (e.g., UV light) in the presence of semiconductor catalyst particles or coatings supported on flexible strips suspended in the gaseous stream.
  • A photocatalytic reactor for processing selected reactants from a fluid medium comprising at least one permeable photocatalytic membrane having a photocatalytic material. The material forms an area of chemically active sites when illuminated by light at selected wavelengths. When the fluid medium is passed through the illuminated membrane, the reactants are processed at these sites separating the processed fluid from the unprocessed fluid. A light source is provided and a light transmitting means, including an optical fiber, for transmitting light from the light source to the membrane.
  • An apparatus based on optimizing photoprocess energetics by decoupling of the process energy efficiency from the DRE for target contaminants. The technique is applicable to both low- and high-flux photoreactor design and scale-up. An apparatus for high-flux photocatalytic pollution control is based on the implementation of multifunctional metal oxide aerogels and other media in conjunction with a novel rotating fluidized particle bed reactor.
  • Disclosed is a method for separating a vaporous or gaseous contaminant from an air stream contaminated therewith. This method includes the steps of: (a) passing contaminated air into a contact zone in which is disposed an aerogel material capable of selectively adsorbing the contaminant from air and contacting the contaminated air with an aerogel material; and (b) withdrawing from the zone, air depleted of the contaminant. For present purposes, contaminant means a material not naturally occurring in ambient air and/or a material naturally occurring in air but present at a concentration above that found in ambient air. Thus, the presentmore » invention scrubs (or treats) air for the purpose of returning it to its ambient composition. Also disclosed is a process for the photocatalytic destruction of contaminants from an air stream where the contaminated air stream is passed into a control cell or contact zone in which is disposed a photocatalytic aerogel and exposing the aerogel to ultraviolet (UV) radiation for photocatalytically destroying the adsorbed contaminant, and withdrawing from the cell an exhaust air stream depleted in the contaminant.« less