燃料化学学报2016，Vol.44Issue(12)：1464-1472,9.
富氮生物质原料热解过程中NOx前驱物释放特性研究
Release characteristic of NOx precursors during the pyrolysis of nitrogen-rich biomass
摘要
Abstract
The release of NOx precursors ( NH3 , HCN and HNCO ) in the pyrolysis of two nitrogen-rich biomass materials, viz. , soybean straw ( SBS) and fiberboard ( FB) , were investigated by thermogravimetric-Fourier transform infrared spectroscopy ( TG-FTIR, for slow pyrolysis ) and horizontal tubular reactor-X-ray photoelectron spectroscopy ( HTR-XPS, for rapid pyrolysis); the effects of final temperature, heating rate and nitrogen form in biomass on the release characteristic were considered. The results indicate that the evolution pathway is related to the form of nitrogen in biomass; nitrogen in SBS ( SBS-N) is mainly converted to NH3 during the secondary cracking reaction, whereas nitrogen in FB ( FB-N) is transformed to NH3 , HCN ( rapid) and HNCO ( slow) during the primary pyrolysis reaction. Nitrogen in biomass ( fuel-N) is inclined to convert to nitrogen in char ( char-N ) at low temperature and to nitrogen in tar ( tar-N ) or NOx precursors at high temperature (> 600℃) , which suggests that a pyrolysis temperature below 600 ℃ can suppress the release of NOx precursors. SBS-N and FB-N are characterized by protein and amide, respectively, which are partly converted to pyrrolic-N and pyridinic-N in char, forming preferably NH3 and HCN, respectively.关键词
大豆秸秆/纤维板/热解/NOx前驱物/含氮结构Key words
soybean straw/fiberboard/pyrolysis/NOx precursor/form of nitrogen分类
能源与动力引用本文复制引用
张晓鸿,詹昊,阴秀丽,吴创之..富氮生物质原料热解过程中NOx前驱物释放特性研究[J].燃料化学学报,2016,44(12):1464-1472,9.基金项目
The project was supported by the National Natural Science Foundation of China (51676195).国家自然科学基金(51676195)资助 （51676195）
