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中文摘要：
利用水平管式炉对不同变质程度煤进行了热解和气化实验,并利用傅里叶红外气体分析仪对热解和气化过程中主要含氮产物的释放规律进行了研究.结果发现,煤的变质程度对煤热解和气化过程中HCN的释放具有重要影响,而对NH3的释放影响较小.对于低变质程度煤来说,挥发分含量较高,而挥发分的深度裂解是HCN产生的主要来源.因此,低变质程度煤热解过程中转化为HCN的燃料氮份额高于高变质程度煤;对于不同变质程度煤在热解过程中转化为NH3的燃料氮份额则大致相当.对不同变质程度煤在CO2气氛条件下气化反应过程中含氮产物生成规律的研究发现,焦炭氮几乎全部转化为NO;转化为NH3的燃料氮份额有所增加;除印尼褐煤外,转化为HCN的燃料氮份额也有所增加;此外,对CO2气化过程中NO的生成机理进行分析,认为焦炭氮的直接氧化可能是NO产生的主要来源.
英文摘要：
Pyrolysis and gasification study of four different rank coals were carried out in a horizontal tube reactor,and the major nitrogenous products were analyzed by a FTIR gas analyzer.It is found that coal rank has a critical influence on fuel-nitrogen ratio converted to HCN during pyrolysis and gasification,while affects NH3 little.Because the deep decomposition of volatile is the major resource of HCN production,the lower rank coal has a higher volatile content which would lead a high HCN fuel-nitrogen ratio,but fuel-nitrogen ratio converted to NH3 is similar for different ranks coals.The different ranks coals gasification in CO2 atmosphere shows that,most of the char-nitrogen is converted to NO,and the fuel-nitrogen converted to NH3 is increased compared with pyrolysis in Ar atmosphere,and the fuel-nitrogen converted to HCN is increased for different ranks coals except Indonesia lignite.We analyzed NO production in CO2 gasification,and recognized the direct oxidation of char-nitrogen might be the major mechanism of NO production.
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