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Photoassisted heterogeneous catalysis with optical fibers: I. Isolated single fiber
Author(s) -
Marinangeli Richard E.,
Ollis David F.
Publication year - 1977
Publication title -
aiche journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.958
H-Index - 167
eISSN - 1547-5905
pISSN - 0001-1541
DOI - 10.1002/aic.690230403
Subject(s) - dimensionless quantity , catalysis , optical fiber , fiber , light scattering , chemistry , absorption (acoustics) , scattering , layer (electronics) , optics , physics , thermodynamics , organic chemistry
Recently reported varieties of photoassisted heterogeneous catalysts are summarized. A cylindrical, light carrying, optical fiber coated with a catalyst layer is evaluated as a novel configuration for all such light assisted catalysis. Equations are obtained which describe the light intensity in the fiber and its surrounding catalyst layer. A dimensionless group of the form Φ = (4α c β c dL )/( d f ) [ d = d c for d c < λ, d = 0(λ) for d c > λ] determines the relative influence of light loss by all absorption and scattering to light transported in the fiber length. An effectiveness factor η I for heterogeneous photoassisted catalysis is determined for reactions which are first order in intensity and without mass transport limitations. Asymptotic forms of η I are η I = 1.0 (Φ ≪ 1.0) and η I = Φ −1 (Φ ≫ 1.0).