Hultén, Anette Heijnesson
(Akzo Nobel Pulp and Paper Performance Chemicals, Bleaching Chemicals)
,
Nilsson, Pär
(Akzo Nobel Pulp and Paper Performance Chemicals, Bleaching Chemicals)
,
Samuelsson, Marie
(Akzo Nobel Pulp and Paper Performance Chemicals, Bleaching Chemicals)
,
Ajdari, Sima
(Department of Energy and Environment, Chalmers University of Technology)
,
Normann, Fredrik
(Department of Energy and Environment, Chalmers University of Technology)
,
Andersson, Klas
(Department of Energy and Environment, Chalmers University of Technology)
Abstract This work has investigated a multi-pollutant flue gas cleaning concept based on oxidation using chlorine dioxide (ClO2) gas with subsequent absorption. The chlorine dioxide gas converts the relatively insoluble nitric oxide (NO) to the more soluble nitrogen dioxide (NO2). This makes a down...
Abstract This work has investigated a multi-pollutant flue gas cleaning concept based on oxidation using chlorine dioxide (ClO2) gas with subsequent absorption. The chlorine dioxide gas converts the relatively insoluble nitric oxide (NO) to the more soluble nitrogen dioxide (NO2). This makes a downstream wet scrubbing process feasible for simultaneous removal of sulphur oxides (SOx) and nitrogen dioxide (NO2). An experimental evaluation of the proposed process using chlorine dioxide gas has been performed on a laboratory scale. The experimental setup, designed and built by Akzo Nobel, consists of a reactor for oxidation, a flue gas condenser and a wet scrubber. The results show that ClO2 gas oxidises NO with high efficiencies under a wide range of process conditions, also in the presence of sulphur dioxide (SO2). The more ClO2 gas is added, the higher the degree of NO oxidation and the total nitrogen oxides (NOx) removal efficiency becomes. The results also show that the presence of water strongly increases the removal of SO2, which is believed to be an effect of liquid phase nitrogen-sulphur interactions. The absorption solution, sodium carbonate and sodium sulphite, is efficient in removing NOx (especially NO2) from the oxidised flue gas. The total NOx reduction at 0.6 ClO2:NO mole ratio and subsequent wet scrubbing is between 79% and 94%, depending on the process conditions used. The total SO2 reduction in the scrubber is between 97% and 100% independent of ClO2 gas addition. Furthermore, the total NOx balance shows that the major part of the NOx is converted to nitrate in the condensate liquor and as nitrite in the absorption solution. A higher ClO2 gas addition and a higher reactor temperature convert more of the NOx to nitrite in the absorption solution. Highlights A multi-pollutant flue gas cleaning concept based on oxidation using chlorine dioxide (ClO2) gas with subsequent absorption. ClO2 gas oxidises NO with high efficiencies under a wide range of process conditions, also in the presence of sulphur dioxide (SO2). The total NOx reduction at 0.6 ClO2:NO mole ratio and subsequent wet scrubbing is between 79 and 94%, depending on the process conditions used. The total SO2 reduction in the scrubber is between 97 and 100% independent of ClO2 gas addition.
Abstract This work has investigated a multi-pollutant flue gas cleaning concept based on oxidation using chlorine dioxide (ClO2) gas with subsequent absorption. The chlorine dioxide gas converts the relatively insoluble nitric oxide (NO) to the more soluble nitrogen dioxide (NO2). This makes a downstream wet scrubbing process feasible for simultaneous removal of sulphur oxides (SOx) and nitrogen dioxide (NO2). An experimental evaluation of the proposed process using chlorine dioxide gas has been performed on a laboratory scale. The experimental setup, designed and built by Akzo Nobel, consists of a reactor for oxidation, a flue gas condenser and a wet scrubber. The results show that ClO2 gas oxidises NO with high efficiencies under a wide range of process conditions, also in the presence of sulphur dioxide (SO2). The more ClO2 gas is added, the higher the degree of NO oxidation and the total nitrogen oxides (NOx) removal efficiency becomes. The results also show that the presence of water strongly increases the removal of SO2, which is believed to be an effect of liquid phase nitrogen-sulphur interactions. The absorption solution, sodium carbonate and sodium sulphite, is efficient in removing NOx (especially NO2) from the oxidised flue gas. The total NOx reduction at 0.6 ClO2:NO mole ratio and subsequent wet scrubbing is between 79% and 94%, depending on the process conditions used. The total SO2 reduction in the scrubber is between 97% and 100% independent of ClO2 gas addition. Furthermore, the total NOx balance shows that the major part of the NOx is converted to nitrate in the condensate liquor and as nitrite in the absorption solution. A higher ClO2 gas addition and a higher reactor temperature convert more of the NOx to nitrite in the absorption solution. Highlights A multi-pollutant flue gas cleaning concept based on oxidation using chlorine dioxide (ClO2) gas with subsequent absorption. ClO2 gas oxidises NO with high efficiencies under a wide range of process conditions, also in the presence of sulphur dioxide (SO2). The total NOx reduction at 0.6 ClO2:NO mole ratio and subsequent wet scrubbing is between 79 and 94%, depending on the process conditions used. The total SO2 reduction in the scrubber is between 97 and 100% independent of ClO2 gas addition.
Davidor Y. Simultaneous DeSNOx and DeHg. In: Presentation at Air quality VIII, Arlington, VA, USA, 24-27 October, Grand Forks, ND, USA: University of North Dakota, Energy & Environmental Research Centre; 2011. 11 pp.
Tavoulareas ES, Jozewics W. Multipollutant emission control technology options for coal fired power plants, EPA-600/R-05/034. Washington, DC, USA: U.S., 138 pp. http://www.epa.gov/airmarkets/resource/docs/multireport2005.pdf; 2005 [accessed 15.01.15].
Crapsey K. Eco power solutions multi-pollutant emissions control system. Northfield, IL, USA: The McIlvaine Company, 22 pp. http://www.mcilvainecompany.com/Universal_power/Subscriber/PowerDescriptionLimks/Kevin%20Craspey%20-520Eco%20Power%20Solutions%208-17-12.pdf; 2012 [accessed 15.01.15].
Carpenter 2013 Advances in multi-pollutant control. CCC/227
J Hazard Mater Sun 192 124 2011 Simultaneous absorption of NOx and SO2 from flue gas with pyrolusite slurry combined with gas-phase oxidation of NO using ozone
J Air Waste Manage Assoc Kasper 46 127 1996 10.1080/10473289.1996.10467444 Control of nitrogen oxide emissions by hydrogen peroxide-enhanced gas-phase oxidation of nitric oxide
J Hazard Mater Jin 135 412 2006 10.1016/j.jhazmat.2005.12.001 Simultaneous removal of SO2 and NO by wet scrubbing using aqueous chlorine dioxide solution
J Hazard Mater Deshwal 150 649 2008 10.1016/j.jhazmat.2007.05.016 Removal of NO from flue gas by aqueous chlorine-dioxide scrubbing solution in a lab-scale bubbling reactor
Int J Appl Eng Res Chelluboyana 9 345 2014 Removal of SO2 and NO by complex absorbent using wet scrubbing
Acta Polytech Scand Chem Technol Patrikainen 287 1 2002 Studies on the consequences of the control of nitrogen oxide emission: slagging of ash and scrubbing of flue gas
Ind Eng Chem Res Ajdari 55 5514 2016 10.1021/acs.iecr.5b04670 Reduced mechanism for nitrogen and sulfur chemistry in pressurized flue gas systems
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