<正>1. IntroductionIncreasing concern over hazards caused by acidrain has motivated research into more environmen-tally and economical1y- accepted viable methods in-stead of tradtional lime or limestone absorptionmethods to remove SO2 and NOx from atmosphericpressure streams, such as flue gases from power sta-tions and exhaust gases from engines. Amongst var-ious techniques the non-thermal plasma approaches,for example electron beam, corona and dielectric bar-rier discharges, have been favored for their efficiency