New developments using holographic concentration in solar photochemical reactors

This paper presents test results achieving on (20 cm x 50 cm) cylindrical h olographic mirrors being recorded in dichromated gelatin for use in solar c hemistry applications. The realized spectral reflectivity range 480 - 620 n m is adapted to the sensitizer Rose Bengal which is the sensitizer frequent ly used in photo-oxidation reactions. Aluminum mirrors and holographic elem ents were used as reflecting elements in a lab-scale parabolic trough react or. The effect of the different elements on the heat transfer into the reac tion was compared.