摘要
研究了四种适宜地下气化的低阶煤在600℃热解条件下热解气中EPA-PAHs的生成分布特征,探讨了原煤组成的影响.结果表明,随着煤变质程度的增大,热解所产生的低环芳烃含量减少,高环芳烃含量增加,EPA-PAHs总量增加;热解气中EPA-PAHs以2R萘、3R苊、3R二氢苊、4R荧蒽、4R芘和4R苯并(a)蒽为主;3R芳烃含量最多,平均占EPA-PAHs总含量的67.57%;EPA-PAHs含量分别在碳含量为76.98%,H/C摩尔比为0.94,O/C摩尔比为0.16和挥发分为43.32%时达到最高水平.
The paper studied the distribution characteristic of EPA PAHs in the pyrolysis gas of coals, the coals were low rank coals which suit for underground gasification and the pyroly- sis experiment was carried out at 600 ~C. The relationship between the concentration of EPA- PAHs and the elemental composition of the coals was discussed. The results showed that, fol lowing with the elevation of coal rank, the concentration of low-ring PAHs decrease, while the concentration of high ring PAHs and the total amount of EPA-PAHs in the pyrolysis gas rise. Naphthalene, acenaphthene, acenaphthylene, fluoranthene, pyrene and benzo(a)anthracene were the major component of EPA-PAHs. The three-rings PAHs take the highest percentage of 67.57%. When the carbon content is 76.98%, H/C molar ratio is 0. 94 , O/C molar ratio is 0.16 and the volatile content is 43. 32G, the total amount of EPA PAHs released from said coal reached the highest level.
出处
《煤炭转化》
CAS
CSCD
北大核心
2011年第1期1-6,共6页
Coal Conversion
基金
国家自然科学基金资助项目(50876112)
中国矿业大学(北京)“大学生创新性实验计划”项目
中央高校科研业务专项基金资助项目(2009QH13)
关键词
多环芳烃
低阶煤
热解
分布特征
PAHs, low rank coal, pyrolysis, distribution characteristic