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%.

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

Experimental investigation of nitric oxide removal from flue gas using hexamminecobalt(II) solution scrubbing in a pilot-scale facility

2018 ◽  
Vol 36 (6) ◽  
pp. 505-512 ◽  
Author(s):  
Bing Han ◽  
Qinghai Li ◽  
Zhen Liu ◽  
Zhongchao Tan ◽  
Yanguo Zhang
Keyword(s):  
Nitric Oxide ◽  
Experimental Investigation ◽  
Removal Efficiency ◽  
Reaction Temperature ◽  
Ph Value ◽  
Pilot Scale ◽  
Optimal Operation ◽  
Experimental Results ◽  
No Removal ◽  
Operation Conditions

An experimental investigation of operational parameters, including liquid/gas ratio (L/G), inlet nitric oxide (NO) concentration, reaction temperature, and pH value of absorbing agent, on NO removal efficiency with hexamminecobalt(II) solution scrubbing was conducted on a pilot-scale facility to search optimal operation conditions. The experimental results show that NO removal efficiency increased with the pH value of hexamminecobalt solution, while the improving rate dropped gradually. When the reaction temperature increased, the NO removal efficiency increased first and then decreased. At the same time, NO removal efficiency increased with the increasing of L/G and hexamminecobalt concentration, while the removal efficiency did not change much at low NO concentration. The pH of 10.4 and L/G of 16 L/m3 were close to the optimal operation conditions, and the scrubbing temperature fell within a reasonable operation temperature. The experimental results can be used as a reference for the design and operation of scaled-up industrial devices.

Application of PFSC in Seawater Desalination Pretreatment

2014 ◽  
Vol 945-949 ◽  
pp. 3510-3513 ◽  
Author(s):  
Jun Cheng ◽  
Si Cheng ◽  
Xiao Fan Cao
Keyword(s):  
Optimal Condition ◽  
Ferric Chloride ◽  
Reaction Temperature ◽  
Ph Value ◽  
Experimental Results ◽  
Curing Temperature ◽  
Molar Ratio ◽  
Seawater Desalination ◽  
Turbidity Removal ◽  
Molar Ratios

The optimal condition of polysilicon ferric chloride (PFSC) flocculant was established by thinking of the factors , such as Si/Fe molar ratios,the reaction temperature and the pH value of the solution. When the molar ratio of Si and Fe = 1, pH value = 0.6, curing temperature at 30 ~40 °C, poly ferric chloride dosage of 0.75mg/L, the rate of turbidity removal of seawater is up to 96.5%. Experimental results show that poly ferric chloride seawater turbidity removal effect is obvious.

Study on the Experiments of Flue Gas Denitrification and Desulfurization Using Nitric Acid Solution

2008 ◽  
Author(s):  
Bao-Ming Sun ◽  
Shui-E Yin ◽  
Zhong-Li Wang
Keyword(s):  
Nitric Acid ◽  
Oxygen Concentration ◽  
Removal Efficiency ◽  
Flue Gas ◽  
Nitric Acid Concentration ◽  
Nox Removal ◽  
No Removal ◽  
Nox Removal Efficiency ◽  
The Individual ◽  
So2 Concentration

The present study attempts to take nitric acid as absorbent to clean up SO2 and NO gases simultaneously from the simulated flue gas in the lab-scale bubbling reactor, this study was divide into the individual DeNOx experiments and the combined DeSOx/DeNOx experiments: the individual DeNOx experiments were carried out to examine the effect of various operating parameters such as input NO concentration, nitric acid concentration, oxygen concentration input SO2 concentration, adding KMnO4 as additive and taking NaOH as the secondary absorption processes on the SO2 and NOx removal efficiencies at room temperature, the results of the individual DeNOx show that NO removal efficiency of 70%–95% were achieved under optimized conditions. NO removal efficiency increased with the increasing nitric acid concentration and increased by adding KMnO4 into the absorbent as additive as well. The removal efficiency of NO can reach 95% when using the two-step integrated processes of (HNO3+KMnO4)-NaOH, the absorption solution of 50% nitric acid, 400ppm of input NO concentration. 0.5% oxygen concentration and without SO2 in the simulated flue gas. No improvement on the NOx removal efficiency was observed with the increasing of KMnO4 and NaOH concentration in the scrubbing solution. The results of the combined DeSOx/DeNOx experiments show that the maximum DeNOx and DeSOx efficiencies ranged from 36.6% to 81% and from 99.4% to 100.0%, respectively. The prime parameters affecting the NOx removal efficiency are the oxygen concentration and the input SO2 concentration.

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

scholarly journals Nitric oxide removal by zinc chloride activated oil palm empty fruit bunch fibre

2021 ◽  
Vol 17 (1) ◽  
pp. 84-89
Author(s):  
Cha Soon Lin ◽  
Naimah Ibrahim ◽  
Norhidayah Ahmad ◽  
Muhammad Adli Hanif ◽  
Sureena Abdullah
Keyword(s):  
Nitric Oxide ◽  
Activated Carbon ◽  
Kinetic Model ◽  
Zinc Chloride ◽  
Flue Gas ◽  
Adsorption Process ◽  
Waste Materials ◽  
Empty Fruit Bunch ◽  
No Adsorption ◽  
No Removal

Nitric oxide (NO) emission is known to pose detrimental effects towards the environment and human beings. Low-temperature NO removal by activated carbon from agricultural waste materials is affordable due to the use of low-cost materials as precursor and elimination of the need for flue gas reheating. The use of chemical agents in activated carbon production improves the performance of waste materials in NO removal. The performance of NO removal was investigated via breakthrough experiment using oil palm empty fruit bunch (EFB) activated with zinc chloride (ZnCl2) at different concentrations (0.1, 0.5, and 1.5 M). Activation of EFB with 0.5 M ZnCl2 resulted in the formation of well-defined micropores, but the use of higher concentration of ZnCl2 resulted in widening of developed pores and intense pore blockage which reduce the accessibility of NO molecules to the adsorption sites. An adsorption isotherm study conducted using 0.5 M ZnCl2/EFB sample with varying NO concentration between 300-1000 ppm indicated that the adsorption process was best defined by Langmuir isotherm model. In addition, adsorption kinetic was investigated at different temperatures; i.e. 100, 150, 200, 250 and 300 °C. NO removal was found to follow Avrami kinetic model at T=100 °C, while upon further increase in temperature, the process was better fitted to the pseudo-second order kinetic model. NO adsorption capacity increases significantly beyond 250 °C up to 1000 mg/g. The activation energy of NO adsorption fell into two distinct regions: -4.73 kJ/mol at 100-200 °C and 84.04 kJ/mol at 200-300 °C. At lower temperature, the adsorption process was exothermic and followed physisorption path, while the increase in reaction temperature led to slower rate of reaction. It was concluded that the removal of NO using EFB modified with ZnCl2 at optimized condition could be a promising alternatives for treating NO-containing flue gas.

Synthesis of Benzaldehyde 1, 2-Propanediol Acetal by Using Ionic Liquid [Hmim]HSO4 as Catalyst

2012 ◽  
Vol 550-553 ◽  
pp. 400-403 ◽  
Author(s):  
Xue Nan Sun ◽  
Li Cui ◽  
Tong Kuan Xu ◽  
Da Zhi Wang
Keyword(s):  
Ionic Liquid ◽  
Reaction Time ◽  
Reaction Temperature ◽  
Raw Materials ◽  
Product Yield ◽  
Experimental Results ◽  
Molar Ratio ◽  
Reaction Conditions ◽  
Good Catalyst ◽  
Optimal Reaction

Benzaldehyde 1, 2-propanediol acetal was synthesized from benzaldehyde and 1, 2-propanediol in the presence of ionic liquid [HMIM]HSO4. The effect of the amount of catalyst, reaction time, reaction temperature, and the molar ratio of raw materials agent on the product yield was investigated respectively. Experimental results demonstrate that ionic liquid [HMIM]HSO4is a good catalyst for preparation of benzaldehyde 1, 2-propanediol acetal. Results showed the optimal reaction conditions are as follows: the mole ratio of benzaldehyde to 1, 2-propanediol is 1：1.3, the amount of catalyst is 3.0g, the reaction temperature is 343K, and the reaction time is 4h. The achieved yield of acetal is 78. 7%.

Experiment on Simultaneous Absorption of NO and SO2 from Sintering Flue Gas by Oxidizing Agents of KMnO4/NaClO

2014 ◽  
Vol 12 (1) ◽  
pp. 539-547 ◽  
Author(s):  
Ying Li ◽  
Wenqi Zhong ◽  
Jing Ju ◽  
Tiancai Wang ◽  
Fei Liu
Keyword(s):  
Removal Efficiency ◽  
Flue Gas ◽  
Initial Solution ◽  
Molar Ratio ◽  
Gas Temperature ◽  
Inlet Concentration ◽  
Solution Ph ◽  
Experimental Conditions ◽  
Simultaneous Absorption ◽  
Spray Absorption

Abstract A complex oxidizing agent combination made up of KMnO4 and NaClO was used to investigate the simultaneous absorption of NO and SO2 from sintering flue gas in a spray absorption tower on a laboratory scale. The effects of various operating parameters, i.e. initial gas temperature (Tg), initial solution pH, molar ratio of NaClO/KMnO4 (M), initial NO inlet concentration (CN) and SO2 initial inlet concentration (CS), were systematically investigated in the experiments. The results showed that the removal efficiency of SO2 was slightly affected by the reaction conditions and remained stable above 98%; however, the removal efficiency of NO was significantly influenced. It presented different trends with the reaction condition changed. The most optimal experimental conditions for simultaneous removal of NO and SO2 were found to be initial solution pH=5.5, Tg=50°C, M=3; in this case the average removal efficiencies of NO and SO2 could reach 98.8 and 70.9%, respectively.

Synthesis and Properties of Waterborne Polyurethane Emulsions Using in Printing Ink

2012 ◽  
Vol 554-556 ◽  
pp. 115-121
Author(s):  
Fei Liang ◽  
Jun Feng Zhou
Keyword(s):  
Water Absorption ◽  
Reaction Temperature ◽  
Raw Materials ◽  
Waterborne Polyurethane ◽  
Experimental Results ◽  
Toluene Diisocyanate ◽  
Molar Ratio ◽  
Neutral Temperature ◽  
R Value ◽  
Printing Ink

Taking polyether dihydroxy alcohol, toluene diisocyanate (TDI) and dimethylolpr- opionic acid (DMPA) as raw materials, aromatic polyether waterborne polyurethane emulsion was synthesized. And then the effects of isocyanate/macroglycol molar ratio(R value), amount of DMPA, neutral degree and temperature on the properties of emulsion such as appearance, viscosity, water absorption and stability were studied. The experimental results showed that when R value is 2~2.5, amount of DMPA used is 5.0%, reaction temperature is 80°C and neutral temperature is 40°C, the waterborne polyurethane emulsion synthesized meet the requirement of printing ink.

Sign in / Sign up

Export Citation Format

Share Document