کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
4488346 1317082 2017 5 صفحه PDF ندارد دانلود رایگان
عنوان انگلیسی مقاله
Treatment of Olefin Plant Spent Caustic by Combination of Neutralization and Fenton Reaction
ترجمه فارسی عنوان
درمان الفین کارخانه سوزاننده توسط ترکیبی از خنثی سازی و فنتون واکنش بودن
کلمات کلیدی
صرف تند تند؛ معرف فنتون؛ اکسیداسیون
spent caustic; Fenton's reagent; oxidation
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
چکیده انگلیسی

Spent caustic from olefin plants contains much H2S and some mercaptans, phenols and oil. A new treatment process of spent caustic by neutralization followed by oxidation with Fenton's reagent (Fe2+/H2O2) was successfully developed. Over 90% of dissolved H2S were converted to gas phase by neutralization at pH=5 and T=70°, and the vent gas stream could be introduced to sulfur recovery plant. The neutralized liquid was oxidized with OH· free radical, which was provided by a Fenton's reagent. The residual sulfides in the neutralized spent caustic were oxidized to less than 0.1 mg/L. The total COD removal of spent caustic is over 99.5% and the final COD value of the effluent can be lower than 100 mg/L under the following oxidation conditions : reaction time=50 min, T=90°, Fe2+=100 mg/L, and a stoichiometric H2O2/COD=1.1. The value is better than the 800 mg/L value obtained by common WAO process. The optimum pH of the Fenton reaction is around 2 for this process, and the oxidation step can maintain a pH value in the range of 1.8–2.4. Moreover, the iron catalyst can be recycled without affecting process effectiveness thus preventing secondary pollution.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 35, Issue 8, June 2001, Pages 2017–2021
نویسندگان
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