Emission of PAHs, NPAHs and OPAHs from residential honeycomb coal briquette combustion
Emission of PAHs, NPAHs and OPAHs from residential honeycomb coal briquette combustion
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DOI：
10.1021/ef401901d
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发表时间：
2014-01-01
期刊：
影响因子：
5.3
通讯作者：
Fu, Jiamo
中科院分区：
文献类型：
--
作者：
Huang, Wei;Huang, Bo;Fu, Jiamo
燃煤是中国最重要的空气污染源之一。测定了5种不同地质成熟度煤(镜质组反射率R-O=0.77~1.88%)蜂窝型煤中1.5种多环芳烃(PAHs)、26种硝化多环芳烃(NPAHs)和6种含氧多环芳烃(Opahs)的排放因子。PAHs、NPAHs和opahs的EFS总量分别为9.82~215 mg kg(-1)、0.14~1.88 mg kg(-1)和4.47~20.8 mg kg(-1)。测量的EFS和气粒分配随地质成熟度的不同而不同。EFS最低的是无烟煤。气相中PAHs、NPAHs和opahs的比例随着地质成熟度的增加而增加。地质成熟度越高的煤产生的3环多环芳烃越多。根据中国2008年对居民部门的统计分析，2007年居民蜂窝煤排放的PAHs、NPAHs和OPAs分别为4.36Gg、0.03Gg和0.47Gg。到2020年，由于新能源使用量的增加，PAHs、NPAHs和opahs的排放量将分别降至2.18Gg、0.02Gg和0.24Gg。如果只使用无烟煤作为居民用煤，2020年将减少93%的PAHs、87%的NPAHs和71%的opahs。
Coal combustion is one of the most significant sources of air pollution in China. In this study, emission factors (EFs) of 1.5 polycyclic aromatic hydrocarbons (PAHs), 26 nitrated PAHs (NPAHs) and 6 oxygenated PAHs (OPAHs) were determined in five different coals with different geological maturity (vitrinite reflectance R-O = 0.77-1.88%) burned in the form of honeycomb briquettes. The total EFs ranged from 9.82 to 215 mg kg(-1) for PAHs, 0.14 to 1.88 mg kg(-1) for NPAHs and 4.47 to 20.8 mg kg(-1) for OPAHs. Measured EFs and gas-particle partitioning varied depending on the geological maturity. The lowest EFs were found in anthracite. The proportion of PAHs, NPAHs and OPAHs in gaseous phase increasing with increased geological maturity. The coal with higher geological maturity produced more 3-ring PAHs. On the basis of the statistical analysis for the residential sector of China in 2008, PAHs, NPAHs and OPAHs emitted from residential honeycomb coal briquettes were 4.36 Gg, 0.03 Gg and 0.47 Gg in 2007, respectively. By 2020, the emission would decrease to 2.18 Gg 0.02 Gg and 0.24 Gg for PAHs, NPAHs and OPAHs due to the increasing usage of new energy resources. If only anthracite is used as the residential coal, 93% PAHs, 87% NPAHs and 71% OPAHs would be reduced in 2020.