H_2S and NH_3 removal by silent discharge plasma and ozone systems

摘要

Treatment of H_2S and NH_3 using the non-thermal plasma (NTP) methods was investigated. Two NTP systems were used in this study, one consisting of a multi-cell plate-to-wire reactor (PTW), and the other consisting of an ozonization chamber and the multi-cell PTW reactor. Each cell of the PTW reactor had a sheet of copper foil embedded in dielectric layers as its high voltage electrode and a wired rack as its grounded electrode. Use of the wired rack type electrode allowed large flow throughput, andpromoted intense local electric fields. The experiments showed that under constant energy input, the decomposition efficiency of H_2S or NH_3 decreased with increasing initial concentration of the gas, and increased with increasing injected ozone and relative humidity.