Evaluation of Residence Time on Nitrogen Oxides Removal in Non-Thermal Plasma Reactor.
Non-thermal plasma (NTP) has been introduced over the last few years as a promising after- treatment system for nitrogen oxides and particulate matter removal from diesel exhaust. NTP technology has not been commercialised as yet, due to its high rate of energy consumption. Therefore, it is important to seek out new methods to improve NTP performance. Residence time is a crucial parameter in engine exhaust emissions treatment. In this paper, different electrode shapes are analysed and the corresponding residence time and NOx removal efficiency are studied. An axisymmetric laminar model is used for obtaining residence time distribution numerically using FLUENT software. If the mean residence time in a NTP plasma reactor increases, there will be a corresponding increase in the reaction time and consequently the pollutant removal efficiency increases. Three different screw thread electrodes and a rod electrode are examined. The results show the advantage of screw thread electrodes in comparison with the rod electrode. Furthermore, between the screw thread electrodes, the electrode with the thread width of 1 mm has the highest NOx removal due to higher residence time and a greater number of micro-discharges. The results show that the residence time of the screw thread electrode with a thread width of 1 mm is 21% more than for the rod electrode.
Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran.
Pouyan
P
Talebizadeh
Department of Mechanical Engineering, Amirkabir University of Technology, Tehran, Iran.
Hassan
H
Rahimzadeh
Petroleum and Gas Engineering Division, School of Computing, Science and Engineering (CSE), University of Salford, Manchester, United Kingdom.
Meisam
M
Babaie
Laser and Plasma Research Institute, University of Shahid Beheshti, Tehran, Iran.
Saeed
S
Javadi Anaghizi
Laser and Plasma Research Institute, University of Shahid Beheshti, Tehran, Iran.
Hamidreza
H
Ghomi
Department of Mechanical and Aeronautical Engineering, Clarkson University, Potsdam, New York, United States of America.
Goodarz
G
Ahmadi
Biofuel Engine Research Facility, Queensland University of Technology, Brisbane, Queensland, Australia.
Richard
R
Brown
D000393:Air Pollutants / Q000737:chemistry / Q000302:isolation & purification*; D000397:Air Pollution / Q000517:prevention & control; D004566:Electrodes; D006801:Humans; D015233:Models, Statistical; D009589:Nitrogen Oxides / Q000737:chemistry / Q000302:isolation & purification*; D052638:Particulate Matter / Q000737:chemistry / Q000302:isolation & purification*; D058626:Plasma Gases / Q000737:chemistry*; D012984:Software; D013997:Time Factors; D001335:Vehicle Emissions / Q000032:analysis*
D000393:Air Pollutants; D009589:Nitrogen Oxides; D052638:Particulate Matter; D058626:Plasma Gases; D001335:Vehicle Emissions