Article

Laser-Induced Fluorescence (LIF) Probe for In-situ Nitric Oxide Concentration Measurement in a Non-thermal Pulsed Corona Discharge Plasma Reactor

Plasma Chemistry and Plasma Processing (impact factor: 1.6). 07/2005; 25(4):351-370. DOI:10.1007/s11090-004-3133-8 pp.351-370

ABSTRACT Laser-induced fluorescence (LIF) is an effective in-situ probe for NO concentrations below 300ppm in a non-thermal plasma reactor. A new method has been developed to measure in-situ NO concentration in the reactor discharge region using a long-time—on the order of seconds—averaged fluorescence detection. This method, for quantifying NO concentration in a nonthermal plasma reactor, is simpler than a short-time—on the order of nanoseconds—fluorescence detection. For accurate measurement based on the new method, the LIF intensity must be close to the corona-induced fluorescence (CIF) intensity; the CIF intensity serves as a guide in selecting the LIF intensity. We find that a kinetic model proposed earlier works for two-tube reactors and represents the NO concentration in the middle of the reactor, which verifies the assumption of gas plug flow.

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Keywords

accurate measurement
 
concentrations
 
corona-induced fluorescence
 
effective in-situ probe
 
gas plug flow
 
kinetic model
 
Laser-induced fluorescence
 
LIF
 
LIF intensity
 
measure in-situ
 
nanoseconds—fluorescence detection
 
new method
 
non-thermal plasma reactor
 
nonthermal plasma reactor
 
reactor discharge region
 
seconds—averaged fluorescence detection
 
simpler
 
two-tube reactors
 

Xudong Hu