کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
207082 | 461206 | 2010 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Effect of oxidizing agents on selenate formation in a wet FGD
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی شیمی
مهندسی شیمی (عمومی)
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چکیده انگلیسی
In a coal combustion process, a considerable amount of selenium is captured in the wet FGD, where it is oxidized from selenite (Se(IV)O32-) to selenate (Se(VI)O42-), which is difficult to remove. Diethyl-p-phenylene-diammonium (DPD) absorptiometric analysis and ion chromatography identified peroxodisulfate ion (S2O82-) as the dominant oxidizing agent in the FGD liquor. Selenite was easily oxidized to selenate in the presence of S2O82- and the oxidation was accelerated as the temperature increased. Addition of Mn2+ ion was found to be effective in controlling selenate formation. When Mn2+ ion was added, S2O82- oxidized not selenite to selenate but rather Mn2+ to MnO2, which captured some dissolved selenite.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Fuel - Volume 89, Issue 9, September 2010, Pages 2490–2495
Journal: Fuel - Volume 89, Issue 9, September 2010, Pages 2490–2495
نویسندگان
Hiroyuki Akiho, Shigeo Ito, Hiromitsu Matsuda,