抄録
To remove nitric oxide (NO) in flue gases at low temperature, the selective non catalytic reduction (SNCR) by photochemical reaction was examined at room temperature. Vacuum ultraviolet irradiation of 172 nm was used as power source of photochemical reaction. Using NO/O_2/N_2/NH_3 gas mixture, the effects of NH_3/NO molar ratios (MR), valid number of photons, and oxygen concentrations on NO removal were investigated. An approximate 99% NO removal was attained at room temperature, however, N_2O was generated from NH_3. NO oxidation by VUV was examined to inhibit N_2O generation under NO/O_2/H_2O/N_2 system. Almost all NO was converted to HNO_3 at room temperature.
