钠、钙、铁对模型化合物热解及燃烧过程中氮逸出规律的影响  

EFFECT OF Na, Ca AND Fe ON EVOLUTION OF FUEL-NITROGEN DURING PYROLYSIS AND COMBUSTION OF MODEL COMPOUND

作　　者：赵宗彬[1] 李文[1] 李保庆[1] 陈皓侃[1] 

机构地区：[1]中国科学院山西煤炭化学研究所煤转化国家重点实验室,山西太原030001

出　　处：《燃料化学学报》2002年第4期294-299,共6页Journal of Fuel Chemistry and Technology

基　　金：国家自然科学基金 ( 2 9876 0 4 7);国家自然科学重点基金 ( 2 9936 0 90 )~~

摘　　要：将咔唑在 650℃ ,1 2MPa焦化条件下所得产物作为含氮模型化合物 ,在固定床反应器中研究了该模型化合物热解及燃烧过程中氮的逸出行为。结果表明 ,热解温度低于 90 0℃时燃料氮主要停留在半焦中 ,HCN和NH3 只占很小的部分 ;催化热解使HCN的量相对减少 ,NH3 相对增加 ;半焦的反应性和燃烧条件影响半焦氮氧化生成NO ,半焦的反应性越高 ,半焦氮对于NO的转化率越低 ;低温下催化剂使半焦氮对于NO的转化率升高 ,而高温下则相反。催化剂对于半焦燃烧时NO排放的影响还与半焦的性质有关 ,同一催化剂在相同的燃烧条件下对不同半焦燃烧的NO释放有不同的影响 ,预示半焦的性质和催化剂之间也有一定的匹配性。Using the high pressure coking product (650?℃,12?MPa) of carbazole as nitrogen containing compound, the catalytic effect of Na, Ca and Fe on the formation of HCN and NH 3 during pyrolysis of model compound and on the evolution of NO during combustion of model compound char was studied The results show that the fuel nitrogen is mainly remained in the char and few is present in the form of HCN and NH 3 when pyrolysis temperature is lower than 1?000?℃ Na is favorable to the transformation of char nitrogen to volatile nitrogen, but Ca and Fe have little effect on it The amount of HCN increases and NH 3 decreases during the catalytic pyrolysis of model compound The formation of NO is affected not only by char property, but also by combustion conditions The higher reactivity of char, the lower conversion of char nitrogen to NO The catalysts restrain the evolution of NO at higher temperature, but favor it at low temperature

关 键 词：钠 钙 铁 逸出规律 含氮模型化合物 热解 燃烧 氮氧化物 煤 

分 类 号：TQ530.2[化学工程—煤化学工程] TQ534