A Solution to the Problem of Large Energy Consumption of the De-NOx Process by Non-Thermal Plasma

2005 ◽  
Vol 8 (2) ◽  
Author(s):  
Yoshio Yoshioka ◽  
Taku Tezuka
Keyword(s):  
Energy Consumption ◽  
Thermal Plasma ◽  
Diesel Exhaust ◽  
High Energy ◽  
Exhaust Gas ◽  
Water Emulsion ◽  
Injection Methods ◽  
Non Thermal Plasma ◽  
Direct Discharge ◽  
Ozone Injection

AbstractIn order to remove NO from diesel exhaust gas, non-thermal plasma methods have been extensively studied. However, it is known that one of the problems of the de-NOx process by non-thermal plasma is the relatively high energy consumption of the de NOx process. In this paper, we tried to solve this problem by using a water emulsion fuel. Since the use of water emulsion fuel reduces the combustion temperature in the engine, the NO concentration at outlet of the engine should decrease considerably. We prepared a water emulsion fuel with different water content, and carried out NO removal experiments for diesel exhaust gas by both direct discharge and by an ozone injection methods. The experiments showed that a large reduction of discharge power for de-NOx process could be achieved.

Efficient NO Removal from Diesel Exhausts Gases by a Combination of Ozone Injection and Exhaust Gas Recirculation

2007 ◽  
Vol 10 (2) ◽  
Author(s):  
Yoshio Yoshioka ◽  
Tetsuya Takahashi ◽  
Tsuyoshi Togashi ◽  
Taiji Shoyama
Keyword(s):  
Energy Consumption ◽  
Exhaust Gas Recirculation ◽  
Combination Method ◽  
Exhaust Gas ◽  
Total Energy Consumption ◽  
No Removal ◽  
Recirculation Rate ◽  
Non Thermal Plasma ◽  
Gas Recirculation ◽  
Ozone Injection

AbstractIn order to remove NO from diesel exhaust gas, non-thermal plasma methods have been expected so far. However it is known that one of the problems is a relatively large energy consumption of the De-NOx process. In this paper, we tried to solve this problem by using a combination method of exhaust gas recirculation and ozone injection. Using a 2.4kVA diesel engine generator, we investigated that how effective is the exhaust gas recirculation to reduce the NO concentration. NO removal experiments were carried out using ozone injecttion method, and a great reduction of discharge energy of De-NOx was confirmed. The optimal recirculation rate was discussed by evaluating the total energy consumption, and we obtained a conclusion that optimal recirculation rate is about 10%.

scholarly journals Performance evaluation of non-thermal plasma on particulate matter, ozone and CO2 correlation for diesel exhaust emission reduction

2015 ◽  
Vol 276 ◽  
pp. 240-248 ◽  
Author(s):  
Meisam Babaie ◽  
Pooya Davari ◽  
Pouyan Talebizadeh ◽  
Firuz Zare ◽  
Hassan Rahimzadeh ◽  
...  
Keyword(s):  
Performance Evaluation ◽  
Particulate Matter ◽  
Thermal Plasma ◽  
Diesel Exhaust ◽  
Emission Reduction ◽  
Exhaust Emission ◽  
Non Thermal Plasma

Nitrogen Oxides Removal by Using Plate Type Reactor Combined with Catalysts

2002 ◽  
Vol 5 (2) ◽  
Author(s):  
Kazuo Shimizu ◽  
Tetsuji Oda
Keyword(s):  
Nitrogen Oxides ◽  
Thermal Plasma ◽  
Zeolite Catalyst ◽  
Zeolite Catalysts ◽  
Exhaust Gas ◽  
Type Reactor ◽  
Dielectric Barriers ◽  
Nox Adsorption ◽  
Non Thermal Plasma ◽  
Plate Type

AbstractNon-thermal plasma has been studied to remove nitrogen oxides. In order to improve both high removal and energy efficiency, the combined process of the catalyst with the non-thermal plasma was examined experimentally. Hydrocarbons were added where real exhaust gas contains hydrocarbons from incomplete combustion. However zeolite catalysts have shown NOx adsorption at room temperature. For decreasing the NOx adsorption on the catalyst surface, a plate type reactor, which has mesh electrodes and dielectric barriers inside, has been developed. Adsorption characteristics of zeolite catalyst were investigated by measuring time dependence of NO or NOx concentrations. They were hardly observed in these experiments, since, quantities of catalyst were very small (4-5%) compared to that of wire-cylinder reactor.

scholarly journals New Experiment of Diesel Exhaust Treatment by Atmospheric Pressure Plasma–Wood Fiber Combination

Catalysts ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 577 ◽  
Author(s):  
Xiurong Guo ◽  
Khanh Hop Ha ◽  
Danfeng Du
Keyword(s):  
Thermal Plasma ◽  
Diesel Exhaust ◽  
Wood Fiber ◽  
Research Work ◽  
Atmospheric Pressure Plasma ◽  
Wood Fibers ◽  
Purification Efficiency ◽  
Exhaust Treatment ◽  
Non Thermal Plasma ◽  
Exhaust Purification

Herein, a novel process of diesel exhaust purification by non-thermal plasma combined with wood fiber has been investigated to understand the effect of purification efficiency on the emission. The dielectric barrier discharge (DBD) and wood fiber (WF) improved removal efficiency of nitrogen oxide (NOx) owing to the positive activity of oxygen-containing functional groups (such as O–H groups or C–O groups) on the wood surface, which promoted the removal of NOx by 10%–13%. The mechanism to remove NOx in the presence of wood fibers was also deduced through FTIR spectra. When carbon black was loaded on the wood fiber, there was simultaneous removal of carbon soot and NOX. Although complete purification was not achieved, a high purification efficiency was obtained under the conditions of room temperature and no catalysts. These advantages highlight the importance of use of wood and non-thermal plasma (NTP), and this research work opens new avenues in the field of emissions treatment.

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