摘要
采用电子能谱 (XPS)测定了我国以烟煤为主的 10种煤样以及对应快速加氢热解半焦中氮的化学形态。研究结果表明我国煤的XPS谱图在 398 8(± 0 1)和 40 0 2 (± 0 1)eV的位置上出现氮峰 ,其相应氮化合物是吡啶和吡咯 ,随煤种不同氮的形态不尽一致 ,但主要是吡啶和吡咯 ,且多数煤以吡咯氮为主。快速加氢热解半焦与煤有相同的氮出峰位置 ,即半焦与煤有相同的氮化学形态 ,加氢热解过程总体为吡咯氮相对含量的增加和吡啶氮的减少。
Using XPS analyses the chemical types of nitrogen of ten different types of Chinese coals and their semi-cokes from flash hydropyrolysis (FHP) are studied The result shows that XPS can effectively determine the chemical types of nitrogen in coal and semi-coke Peak of XPS locates in 3988 (±01)*#eV and 4002 (±01)*#eV, which corresponds to pyrrole and pyrridinic The nitrogen types are different in coals but mainly are pyrrole and pyrridinic, and often the pyrrole is more than pyrridinic The nitrogen type in coke from FHP is as the same as in coal In FHP, the relative content of pyrrole increases and pyrridinic reduces Therefore, it was put forward that flash hydropyrolysis is a new important clean-coal-technique and has notable effect of denitrogenation
出处
《燃料化学学报》
EI
CAS
CSCD
北大核心
2001年第2期124-128,共5页
Journal of Fuel Chemistry and Technology
基金
国家自然科学基金! (2 94762 3 2 )&&
