The effect of AC applied voltage phase differences on the NO{sub x} reduction from the combustion flue gases by superimposed surface and silent discharge plasma reactors

Conference · Sun Dec 31 04:00:00 EST 1995

OSTI ID:415528

Urashima, K ^[1]; Chang, J S ^[1]; Ito, T ^[2]

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1. McMaster Univ., Hamilton, Ontario (Canada). Dept. of Engineering Physics
2. Musahi Inst. of Tech., Setagaya, Tokyo (Japan). Dept. of Electrical and Electronic Engineering

The effect of ac applied voltage phase differences on the NO{sub x} reduction from the combustion flue gases by superimposed surface and silent discharge plasma reactor is experimentally investigated. The experiments are conducted for the applied voltages from 0 to 24 kV, the flue rates from 0.5 to 2 L/min, the ammonia mixture concentration from 0.7 to 1.2 stoichiometry, and the applied phase differences from 0 to 180 degrees, where two 60 Hz ac power supplies are used. The results show that: (1) NO{sub x} reduction rate increases with increasing discharge power, gas flow rate and ammonia stoichiometry for in-phase operations; (2) NO{sub x} reduction rate for out-of-phase operations is much higher compared with in-phase operations. However, NO{sub x} reduction rate has an optimum condition on ammonia stoichiometry, discharge power and gas flow rate; (3) Energy efficiency of NO{sub x} reduction increases with increasing ammonia mixture and gas flow rate, and decreases with increasing discharge power; (4) Energy efficiency of NO{sub x} reduction under out-of-phase operations is much larger compared with in-phase operations.

• OSTI ID: 415528
• Report Number(s): CONF-9510203--
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
AIR POLLUTION CONTROL
CORONA DISCHARGES
DENITRIFICATION
FLUE GAS
NITROGEN OXIDES
POLLUTION CONTROL EQUIPMENT