3-14-1 高窒素含有バイオマス系廃棄物の熱分解における窒素の挙動に関する研究(Session 3 バイオマス等)

概要

論文の詳細を見る
Nitrogen content in biomass is usually higher than that in fossil fuel, and that nitrogen in biomass can form NOx precursors like ammonia (NH3) and hydrogen cyanide (HCN), and toxic contaminant like organic nitrogenated compounds (N-Tar) during the primary thermal conversion processes. In this study, sewage sludge and mycelial waste from antibiotic production as two kinds of typical industrial waste biomass with high nitrogen content were pyrolyzed in a batch scale fixed-bed reactor to understand the conversion behavior of fuel bound nitrogen (Fuel-N) and the formation of major nitrogen-containing products. A series of experiments of the rapid pyrolysis and the slow pyrolysis (10K/min) in the temperature range of 500-800℃ were conducted to investigate the nitrogen transformation behavior among pyrolysis products. The results showed that the yield of Char-N reduced with the increase of the pyrolysis temperature. With the same pyrolysis method, Tar-N production mainly depended on VN% of biomass. HCN was the predominant NOx precursor for the rapid pyrolysis of biomass whereas NH_3 was more than HCN for the slow pyrolysis of mycelial waste due to the additional NH3 formation through the reaction among Char-N, HCN and H radicals.
2012-07-30