Absorption of NO by NaClO2 solution:: Performance characteristics

被引:37
作者
Hsu, HW [1 ]
Lee, CJ [1 ]
Chou, KS [1 ]
机构
[1] Natl Tsing Hua Univ, Dept Chem Engn, Hsinchu 30043, Taiwan
关键词
NaClO2; NOx; absorption; kinetic study; robust design;
D O I
10.1080/00986449808912736
中图分类号
TQ [化学工业];
学科分类号
0817 ;
摘要
The absorption of lean NO (200 similar to 1000 ppm) gases in aqueous NaClO2 solution was investigated in both a mechanically stirred vessel and a packed tower. The chemical reaction rate btween NO and NaClO2 in alkaline solution was shown to be second-order with respect to NO concentration and first-order to NaClO2 concentration. After including mass transfer considerations, the absorption rate equation established in this work (under the condition of NaClO2 concentration less than 1.0 M and temperature at 30 degrees C) is given as: R-A = P-A (682 x 10(5) + 1/2.97 x 10(-2) {[NO](i)[NaClO2](0)}(1/2))(-1) (moles/sec cm(3)) In addition, a robust design method was also used to study the performance of this de NOx process by NaClO2 solution in a packed tower. SIN analysis of the results indicated that the pH of liquor, NaClO2 concentration and NaOH concentration were the major factors in affecting both NO oxidation and absorption efficiencies.
引用
收藏
页码:67 / 81
页数:15
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