Application of optical-fiber photoreactor for CO2 photocatalytic reduction

J.C.S. Wu, T.-H. Wu, T. Chu, H. Huang, Din-ping Tsai

Research output: Journal article publicationJournal articleAcademic researchpeer-review

78 Citations (Scopus)

Abstract

An optical-fiber photoreactor, comprised of 216 xcatalyst-coated fibers, was designed and assembled to transmit and spread light uniformly inside the reactor. The power loss of light transmission inside an optical fiber was calculated using beam propagation method. The optimum length of optical fiber was estimated to be near 11 cm long in order to entirely spread out light energy over surface catalyst. Vapor-phase CO2 was photocatalytically reduced to methanol using the photoreactor under UV irradiation in a steady-state flow system. The solutions of metal-loaded titania were prepared by thermal hydrolysis method. Metal-loaded TiO2 film was coated on optical fibers by dip-coating method. TiO2, Cu/TiO2 and Ag/TiO2 films were uniformly on the fibers and their thicknesses ranged from 27 to 33 nm. The films consisted of very fine spherical particles with diameters of 10-20 nm. The XRD spectra indicated anatase phase for all films. Methanol yield increased with UV irradiative intensity. Maximum methanol rate was 4.12 ?mole/g-cat h using 1.0 wt%-Ag/TiO2 catalyst at 1.13 bar of CO2, 0.03 bar of H2O pressures, and 5,000 s mean residence time under 10 W/cm2 UV irradiation. © Springer Science+Business Media, LLC 2008.
Original languageEnglish
Pages (from-to)131-136
Number of pages6
JournalTopics in Catalysis
Volume47
Issue number3-4
DOIs
Publication statusPublished - 1 Apr 2008
Externally publishedYes

Keywords

  • CO2 conversion
  • Optical-fiber photoreactor
  • Photocatalysis
  • Renewable energy

ASJC Scopus subject areas

  • Catalysis
  • Chemistry(all)

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