کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4486497 1316991 2006 11 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Electrochemical conversion characteristics of ammonia to nitrogen
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات فرآیندهای سطح زمین
پیش نمایش صفحه اول مقاله
Electrochemical conversion characteristics of ammonia to nitrogen
چکیده انگلیسی

In order to evaluate the electrolytic decomposition characteristics of ammonia to nitrogen, this work has studied several experimental variables of electrolytic ammonia decomposition. The effects of the pH and the chloride ion in the solution, kinds of anodes such as IrO2, RuO2, and Pt on the electrolytic decomposition of ammonia were compared, and the existence of a membrane equipped in the cell, the changes of the current density, the initial ammonia concentration, and so on were investigated for the decomposition. The performances of the electrode were totally in the order of RuO2≈IrO2>Pt in both the acid and alkali conditions. The ammonia decomposition was the highest at a current density of 80 mA/cm2, over which it decreased, because the adsorption of the ammonia at the electrode surface was hindered by the hydroxyl ions in the solution. The ammonia decomposition yield increased with the concentration of the chloride ion in the solution. However, the increment rate became much lesser over 10 g/l of the chloride ion. The RuO2 electrode among the tested anodes generated the most OH radicals which could oxidize the ammonium ion at pH 7.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Water Research - Volume 40, Issue 7, April 2006, Pages 1431–1441
نویسندگان
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