Experimental studies on AC dielectric barrier corona discharge reactors for NO{sub x}/SO{sub x} decompositions

Conference · Wed Dec 31 04:00:00 EST 1997

OSTI ID:323612

Kim, Y H; Hong, S H ^[1]

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1. Seoul National Univ. (Korea, Republic of). Dept. of Nuclear Engineering

Recently the interest in the AC dielectric barrier corona discharge (DBCD) is rapidly growing because of their successful application to the decomposition of air pollutants such as NO{sub x}/SO{sub x}. In this work, two types of DBCD reactors, cylinder-wire and pins-plate, are designed and experimented, and their decomposition efficiencies of NO{sub x} and SO{sub x} are compared. The powered electrodes of either tungsten wire or pins having a radius of curvature of 1 mm are fixed at 20 mm away from dielectric barriers of pyrex tube or acryl plate with a thickness of 2 mm. Stainless steel tube and plate of 100 mm in length are used as a grounded electrode of both type reactors, respectively. The gas treatment time is about 1 sec at a flow rate of 8 1/min in a discharge volume of about 120 cm{sup 3}. An AC high-voltage transformer, simulating pollutant gases containing 500-ppm NO or SO{sub 2}, and a gas analyzer are employed in the decomposition experiments for finding out an optimal reactor type and operating parameters.Decomposition efficiencies are measured by varying the amplitudes and frequencies of applied voltage and the flow rates and compositions of simulating pollutant gases. The experimental results show that the cylinder-wire type is more efficient in decomposing NO and So{sub 2} than pins-plate one.

• OSTI ID: 323612
• Report Number(s): CONF-970559--
• Country of Publication: United States
• Language: English

Related Subjects

54 ENVIRONMENTAL SCIENCES
AIR POLLUTION CONTROL
CHEMICAL REACTORS
CORONA DISCHARGES
DECOMPOSITION
DESIGN
NITROGEN OXIDES
POLLUTION CONTROL EQUIPMENT
SULFUR OXIDES