无烟煤燃料氮的热解析出规律

Using a fixed-bed pyrolysis reactor, the formation of Tar-N, HCN, NH3 and Char-N out of four kinds of blind coal from different producing areas,as well as the characteristics of released N on the fuel nitrogen,were studied between 400 ℃～1 200 ℃ under an Ar atmosphere. It was shown that HCN yield increased with increasing temperature from 400 ℃ to 1 200 ℃, while the yield of NH3 increased to its maximum at 1 000 ℃, followed by a slight decreasing. In contrast, Char-N yield decreased with increasing temperature. At≥1 000 ℃, the yield of NH3-N and NH3-N +HCN-N decreased as the volatiles of parent coal increased. Tar-N yield was little and almost had no change in all temperature range for all coals.