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Title: Enhanced photocatalysis in a pilot laminar falling film slurry reactor

Abstract

Laminar falling film slurry (LFFS) photocatalytic reactors are one of the most efficient reactor configurations for conducting heterogeneous photocatalytic reactions, particularly for wastewater treatment. This paper presents a study on the oxidation of an aqueous salicylic acid waste in a pilot continuous flow LFFS photocatalytic reactor which has an optimum design for light absorption. In conducting the oxidation reaction, heterogeneous photocatalysis was supplemented with other photon-assisted processes. The effect of light intensity, radiation wavelength, oxidizing-enhancing agents, substrate and photocatalyst concentration, and exposure time were studied. A comparison of six different photon-based processes showed that higher oxidation rates of salicylic acid were obtained when there was concomitant photocatalysis, photolysis, and UV peroxidation. The oxidation rates of salicylic acid with this combined process were at least 1 order of magnitude higher in comparison with those for UVA photocatalysis and 3-fold higher in comparison with homogeneous UVC photolysis/UVC peroxidation.

Authors:
;  [1]
  1. Hong Kong Univ. of Science and Technology, Clear Water Bay, Kowloon (Hong Kong)
Publication Date:
Sponsoring Org.:
USDOE
OSTI Identifier:
697164
Resource Type:
Journal Article
Journal Name:
Industrial and Engineering Chemistry Research
Additional Journal Information:
Journal Volume: 38; Journal Issue: 9; Other Information: PBD: Sep 1999
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; 32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION; 54 ENVIRONMENTAL SCIENCES; CHEMICAL REACTORS; DESIGN; PHOTOLYSIS; WASTE WATER; WATER TREATMENT; OXIDATION; SURFACE WATERS; GROUND WATER

Citation Formats

Puma, G.L., and Yue, P.L. Enhanced photocatalysis in a pilot laminar falling film slurry reactor. United States: N. p., 1999. Web. doi:10.1021/ie9807607.
Puma, G.L., & Yue, P.L. Enhanced photocatalysis in a pilot laminar falling film slurry reactor. United States. doi:10.1021/ie9807607.
Puma, G.L., and Yue, P.L. Wed . "Enhanced photocatalysis in a pilot laminar falling film slurry reactor". United States. doi:10.1021/ie9807607.
@article{osti_697164,
title = {Enhanced photocatalysis in a pilot laminar falling film slurry reactor},
author = {Puma, G.L. and Yue, P.L.},
abstractNote = {Laminar falling film slurry (LFFS) photocatalytic reactors are one of the most efficient reactor configurations for conducting heterogeneous photocatalytic reactions, particularly for wastewater treatment. This paper presents a study on the oxidation of an aqueous salicylic acid waste in a pilot continuous flow LFFS photocatalytic reactor which has an optimum design for light absorption. In conducting the oxidation reaction, heterogeneous photocatalysis was supplemented with other photon-assisted processes. The effect of light intensity, radiation wavelength, oxidizing-enhancing agents, substrate and photocatalyst concentration, and exposure time were studied. A comparison of six different photon-based processes showed that higher oxidation rates of salicylic acid were obtained when there was concomitant photocatalysis, photolysis, and UV peroxidation. The oxidation rates of salicylic acid with this combined process were at least 1 order of magnitude higher in comparison with those for UVA photocatalysis and 3-fold higher in comparison with homogeneous UVC photolysis/UVC peroxidation.},
doi = {10.1021/ie9807607},
journal = {Industrial and Engineering Chemistry Research},
number = 9,
volume = 38,
place = {United States},
year = {1999},
month = {9}
}