Abstract：
:The present study focuses on a possibility for improving NO removal efficiency from flue gas by application of powerful sound waves. The sound waves (frequency 6.9-17.2kHz, intensity 144-160dB) are propagated from Hartmann sound generators to a preheated graphite disk inside a vertical reaction tube (height 1.8m, I.D. 105mm). An Ar-NO synthetic mixture (NO 911-934ppm) is blown onto the disk surface to perform reactions in the system C-NO. It is found that the NO reduction rate can be significantly enhanced by the sound waves but the enhancement effect is dependent on the sound frequency, intensity and temperature of disk surface. The better effects are obtained at a temperature of 973K and sound frequencies between 9.6 and 12.4kHz. Under these conditions, the sound application results in 3-5-fold enhancement of NO reduction rate. The obtained effects are explained in terms of gas-phase mass transfer controlling mechanism and of near surface turbulent diffusivity.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Komarov SV,Nemeth S,Hirasawa Mdoi
10.1016/j.ultras.2004.06.010subject
Has Abstractpub_date
2005-02-01 00:00:00pages
241-6issue
4eissn
0041-624Xissn
1874-9968pii
S0041-624X(04)00234-3journal_volume
43pub_type
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