Optimization of photocatalytic decolorization of C.I. Basic Blue 41 in semi-pilot scale prototype solar photoreactor
| Autor: | Mohammed Berkani, Mohammed Kheireddine Bouchareb, Mohamed Bouhelassa |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Aqueous solution Central composite design Renewable Energy Sustainability and the Environment General Chemical Engineering Organic Chemistry Environmental engineering Pilot scale Pollution Catalysis Volumetric flow rate Inorganic Chemistry chemistry.chemical_compound Fuel Technology chemistry Chemical engineering Titanium dioxide Photocatalysis Response surface methodology Waste Management and Disposal Biotechnology |
| Zdroj: | Journal of Chemical Technology & Biotechnology. 89:1211-1218 |
| ISSN: | 0268-2575 |
| DOI: | 10.1002/jctb.4429 |
| Popis: | BACKGROUND The photocatalytic decolorization of C.I. Basic blue (BB41) in aqueous catalyst suspensions of titanium dioxide (TiO2), Degussa P25, was carried out in a semi-pilot scale prototype solar photoreactor equipped with compound parabolic collectors (CPCs). The experiments on the solar reactor were performed with and without collectors. Response surface methodology (RSM) was applied to assess individual and interactive effects of the four main independent parameters (initial dye concentration, TiO2concentration, flow rate and initial pH) on the decolorization efficiency, the central composite design (CCD) was used for optimization of UV/TiO2 process. RESULTS The presence of the collectors has increased the rate of decolorization of 50% for an initial dye concentration of 40 mg L−1 and after 80 kJ L−1 of visible energy accumulated. Predicted values of decolorization efficiency according to RSM were in close agreement with the experimental values (R2 = 0.9626, Adj-R2 = 0.9252). Optimization results showed that maximum decolorization efficiency was achieved at the optimum conditions catalyst concentration 0.577 g L−1, initial dye concentration 17.933 mg L−1, flow rate 1446.8 L h−1 and initial pH 4.6 for 60 kJ L−1 of VIS energy accumulated. CONCLUSION The photocatalytic decolorization of a textile dye, C.I. Basic Blue 41, in a tubular solar prototype photoreactor was optimized. Response surface methodology based on the central composite design has been shown to be a powerful tool in the development of any photocatalytic process due to its impact on the economy and practicability of the process. © 2014 Society of Chemical Industry |
| Databáze: | OpenAIRE |
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