Catalytic activity of pitch-based activated carbon fiber of large surface area heat-treated at high temperature and its regeneration for NO-NH_3 reaction at ambient temperatures

摘要

The catalytic activity of a pitch-based activated carbon fiber(ACF)of very large surface area(OG-20A)was studied for NO-NH_3 reaction in a flow reactor at ambient temperatures. The ACF exhibited the highest activity in wet as well as dry gas among heat-treated ACFs so far examined by the present authors. The calcination at 1100 deg. C was essential to exhibit the highest activity especially in wet gas. Although high humidity always retarded the reaction very markedly, its retardation was very much emphasized against NO of low concentration around 10 ppm. Sufficient amount of OG-20A-H1100(3 g)allowed complete removal of 10-200 ppm NO by reduction and adsorption for initial 6 h even at least in wet gas at 25-30 deg. C depending on NO concentration.