کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
46068 46429 2012 6 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Ni supported on Mg–Al oxides for continuous catalytic wet air oxidation of Crystal Violet
موضوعات مرتبط
مهندسی و علوم پایه مهندسی شیمی کاتالیزور
پیش نمایش صفحه اول مقاله
Ni supported on Mg–Al oxides for continuous catalytic wet air oxidation of Crystal Violet
چکیده انگلیسی

The continuous catalytic oxidation of aqueous Crystal Violet (CV) solutions has been investigated using a nickel catalysts (7 wt%) supported over Mg–Al mixed oxides in a trickle-bed reactor. The influence of the temperature, pressure, gas flow and dye initial concentration were studied in the catalytic wet air oxidation of CV. The catalyst showed a very stable activity up to 350 h on stream with an average total organic carbon (TOC) conversion of 64%. CV and TOC removal were very sensitive to the temperature. Dye conversion augmented from 44.7% at 120 °C to 86.1% at 180 °C. Dye conversion varied from 62.6 to 18.4%, TOC from 59.5 to 18.7% and TN from 66.6 to 14.0% within 10 to 50 ppm of initial dye concentration. The leaching of Ni was 6 wt% of the initial metal present in the catalyst and a 0.59% of carbonaceous deposit was formed onto the catalyst surface.

Figure optionsDownload as PowerPoint slideHighlights
► Ni/MgAlO catalyst.
► Catalytic wet air oxidation in trickle-bed reactor for Crystal Violet removal.
► Effect of the reaction variables was tested.
► The catalyst proved to be stable and efficient for the dye degradation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Applied Catalysis B: Environmental - Volume 125, 21 August 2012, Pages 166–171
نویسندگان
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