New Experimental Results of NO Removal from Simulated Flue Gas by Wet Scrubbing Using NaClO Solution

2017 ◽  
Vol 31 (3) ◽  
pp. 3047-3054 ◽  
Author(s):  
Zhitao Han ◽  
Shaolong Yang ◽  
Xinxiang Pan ◽  
Dongsheng Zhao ◽  
Jingqi Yu ◽  
...  
Keyword(s):  
Flue Gas ◽  
Experimental Results ◽  
No Removal ◽  
Wet Scrubbing

Application of Ozone in the Treatment of Nitric Oxide from Simulated Flue Gas

2013 ◽  
Vol 838-841 ◽  
pp. 2663-2666
Author(s):  
Xu Jie Lu
Keyword(s):  
Nitric Oxide ◽  
Removal Efficiency ◽  
Reaction Temperature ◽  
Flue Gas ◽  
Experimental Results ◽  
Molar Ratio ◽  
No Removal ◽  
Operating Condition ◽  
Molar Ratios

The objective of this work was to study the effect of some operating condition on the removal of NO from simulated flue gas in the lab-scale agitated bubbling reactor. The experimental results showed that NO removal efficiency went up with the increase in the molar ratios of O3/NO and the NO removal efficiency reached 92% at 3 of molar ratio. It can also be found that the average removal efficiency was slightly affected by the reaction temperature and almost retained over 75%.

scholarly journals Study on the removal of NO from flue gas by wet scrubbing using NaClO3

2019 ◽  
Vol 84 (10) ◽  
pp. 1183-1192
Author(s):  
Deqi Shi ◽  
Guoxin Sun ◽  
Yu Cui
Keyword(s):  
Flue Gas ◽  
Removal Rate ◽  
Cost Effective ◽  
Sodium Chlorate ◽  
Effect Of Temperature ◽  
Sodium Chlorite ◽  
Reaction Products ◽  
Experimental Conditions ◽  
No Removal ◽  
Wet Scrubbing

In order to remove nitric oxide (NO) from flue gas, from small coal-fired boilers, it is necessary to exploit the cost-effective wet denitration technology. The absorption of NO with sodium chlorate solution was studied. The effects of experimental conditions, such as temperature, NaClO3 concentration, type of acid, mole ratio of NaClO3 to hydrogen ions, on NO removal rate were investigated, and the optimal conditions were established. As the effect of temperature on denitration was related to the type of acid used, the temperature required for sulfuric acid was high, and the temperature required for nitric acid was low. The optimal mole ratio between NaClO3 and the two types of acids was the same. The reaction products were analyzed by ion chromatography. The reacted solution could be recycled after the removal of sodium chloride. The reaction mechanism and the total chemical reaction equation of NaClO3 denitration were deduced. The thermodynamic derivations showed that this oxidation reaction could proceed spontaneously and the reaction was very thorough. NaClO3 exhibited high NO removal efficiency and its denitration cost was much lower than sodium chlorite.

Simultaneous Removal of SO2 and NO from Flue Gas Using Ozone

2013 ◽  
Vol 838-841 ◽  
pp. 2721-2725
Author(s):  
Xu Jie Lu
Keyword(s):  
Removal Efficiency ◽  
Flue Gas ◽  
Experimental Results ◽  
Molar Ratio ◽  
Simultaneous Removal ◽  
Distilled Water ◽  
No Removal ◽  
Operating Condition ◽  
Removal Efficiencies

The objective of this work was to study the effect of some operating condition on the simultaneous removal of NO and SO2from simulated flue gas in the lab-scale agitated bubbling reactor. The experimental results showed that NO removal efficiency increased with the increase in the molar ratio of O3/NO, while removal efficiency of SO2decreased. When absorption liquid changed from distilled water to Na2CO3solution, it is observed that removal efficiencies of NO and SO2increase with the increase in the concentration of Na2CO3solution. At 0.08 mol/L of Na2CO3solution, the removal efficiencies of SO2and NO are 100% and 93%, respectively

A study on kinetics of NO absorption from flue gas by using UV/Fenton wet scrubbing

2012 ◽  
Vol 197 ◽  
pp. 468-474 ◽  
Author(s):  
Yangxian Liu ◽  
Jun Zhang ◽  
Zhuliang Wang
Keyword(s):  
Flue Gas ◽  
Wet Scrubbing ◽  
Kinetics Of ◽  
No Absorption

Simulation of Simultaneous Desulfurization and Denitrification of Flue Gas Using Pulsed Discharge Plasma

2011 ◽  
Vol 356-360 ◽  
pp. 1118-1121 ◽  
Author(s):  
Qi Zhou ◽  
Qi Yu ◽  
Ling Wei Li ◽  
Wen Xi Yu ◽  
Gang Yu
Keyword(s):  
Water Vapor ◽  
Residence Time ◽  
Flue Gas ◽  
Discharge Plasma ◽  
Removal Rate ◽  
Concentration Curve ◽  
Pulsed Discharge ◽  
No Removal ◽  
Simultaneous Desulfurization And Denitrification ◽  
Pulsed Discharge Plasma

Desulfurization and Denitrification processes in two pulsed discharge plasma systems (NO/SO2/N2/O2/H2O and NO/SOSubscript text2/NSubscript text2/OSubscript text2) were simulated respectively, and then the removal characteristics of these two gas systems were analyzed. The results show that NO can be completely removed when the residence time is close to 1.3 s and SOSubscript text2 removal rate is 61.5% when the residence time reaches 3 s in a system containing water vapor (HSubscript text2O). When the system does not contain water vapor, NO removal rate is still much high, but SOSubscript text2 removal rate is approximately zero. When OSubscript text2 concentration is increased, NO removal velocity will be faster and the peak of the concentration curve of NOSubscript text2 will be higher. NO removing velocity is much faster in a system containing water vapor than that in a system without water vapor when both systems have almost the same OSubscript text2 concentration.

scholarly journals Pilot-scale studies on NOx removal from flue gas via NO ozonation and absorption into NaOH solution

2012 ◽  
Vol 33 (3) ◽  
pp. 345-358 ◽  
Author(s):  
Maciej P. Jakubiak ◽  
Keyword(s):  
Flue Gas ◽  
Experimental Studies ◽  
Pilot Scale ◽  
No Oxidation ◽  
Molar Ratio ◽  
Nox Removal ◽  
Gas Channel ◽  
Wet Scrubbing ◽  
Naoh Solution ◽  
Gas Ratio

Abstract The paper presents results of experimental studies on removal of NOx from flue gas via NO ozonation and wet scrubbing of products of NO oxidation in NaOH solutions. The experiment was conducted in a pilot plant installation supplied with flue gas from a coal-fired boiler at the flow rate 200 m3/h. The initial mole fraction of NOx,ref in flue gas was approx. 220 ppm, the molar ratio X = O3/NOref varied between 0 and 2.5. Ozone (O3 content 1÷5% in oxygen) was injected into the flue gas channel before the wet scrubber. The effect of the mole ratio X, the NaOH concentration in the absorbent, the liquid-to-gas ratio (L/G) and the initial NOx concentration on the efficiency of NOx removal was examined. Two domains of the molar ratio X were distinguished in which denitrification was governed by different mechanisms: for X ≤ 1.0 oxidation of NO to NO2 predominates with slow absorption of NO2, for X >> 1.0 NO2 undergoes further oxidation to higher oxides being efficiently absorbed in the scrubber. At the stoichiometric conditions (X = 1) the effectiveness of NO oxidation was better than 90%. However, the effectiveness of NOx removal reached only 25%. When ozonation was intensified (X ≥ 2.25) about 95% of NOx was removed from flue gas. The concentration of sodium hydroxide in the aqueous solution and the liquid-to-gas ratio in the absorber had little effect on the effectiveness of NOx removal for X > 2.

Sign in / Sign up

Export Citation Format

Share Document