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International Journal of Photoenergy
Volume 2014, Article ID 502326, 10 pages
Research Article

Photocatalytic Active Coatings for Lignin Degradation in a Continuous Packed Bed Reactor

1Institute of Bioprocess Engineering and Pharmaceutical Technology, University of Applied Sciences Mittelhessen, 35390 Giessen, Germany
2Department of Chemical Engineering, Faculty of Engineering, Kansas State University, Manhattan, KS 66506, USA
3Faculty of Biology and Chemistry, Justus Liebig University, Giessen, Germany
4Faculty of Biology and Chemistry, Justus Liebig University, 35392 Giessen, Germany

Received 9 December 2013; Revised 23 February 2014; Accepted 24 February 2014; Published 1 April 2014

Academic Editor: Vincenzo Augugliaro

Copyright © 2014 Colin Awungacha Lekelefac et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


The synthesis of immobilized catalyst on porous glass support material via the sol-gel route is reported. TiO2-P25-SiO2 + Pt, TiO2-P25-SiO2, TiOSO4_30.6 wt%, and ZnO + TiO2-P25-SiO2 catalysts were synthesized and a comparative study is done regarding morphology of coatings, degradation rates, reaction rates, dissolved carbon (DC), formation of peaks, and fluorescence of products formed from the photocatalytic degradation of lignin sulfonate obtained from a local paper plant. Through simultaneous reaction-extraction pathways applying dialysis filtration and highly porous polystyrene divinylbenzene adsorbent resin (HR-P) for solid phase extraction (SPE), an attempt has been made to isolate smaller molecules produced from photocatalytic degradation. Moreover relatively high lignin sulfonate (0.5 g/L) concentrations are used in the reactions. UV-Vis spectroscopy revealed a faster reduction in the concentration values for the aliphatic moiety compared to the aromatic moiety. Peaks were observed by both fluorescence spectroscopy and HPLC suggesting the production of new substances and fluorophores.