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首页> 外文期刊>Journal of Environmental Sciences >Investigation of polycyclic aromatic hydrocarbons from coal gasification
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Investigation of polycyclic aromatic hydrocarbons from coal gasification

机译：煤气化法制备多环芳烃的研究

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The hazardous organic pollutants generated from coal gasification, such as polycyclic aromatic hydrocarbons(PAHs), are highly mutagenic and carcinogenic. More researchers have paid particular attention to them. Using air and steam as gasification medium, the experiments of three kinds of coals were carried out in a bench-scale atmospheric fluidized bed gasifier. The contents of the 16 PAHs specified by US EPA in raw coal, slag, bag house coke, cyclone coke and gas were measured by HPLC to study the contents of PAHs in raw coal and the effects of the inherent characters of coals on the formation and release of PAHs in coal gasification. The experimental results showed that the distributions of PAHs in the gasified products are similar to raw coals and the total-PAHs content in coal gasification is higher than in raw coal(except Coal C). The total-PAHs contents increase and then decrease with the rise of fixed carbon and sulfur of coal while there has an opposite variation when volatile matters content increase. The quantities of PAHs reduce with the increase of ash content or the drop of heating value during coal gasification.
机译：煤气化过程中产生的有害有机污染物，例如多环芳烃（PAHs），具有很高的致突变性和致癌性。越来越多的研究者对此给予了特别的关注。以空气和蒸汽为气化介质，在台式大气流化床气化炉中进行了三种煤的实验。通过HPLC测定了US EPA规定的原煤，炉渣，袋装焦炭，旋风焦炭和煤气中16种多环芳烃的含量，研究了原煤中多环芳烃的含量以及煤的内在特性对地层形成和形成的影响。在煤气化中释放多环芳烃。实验结果表明，气化产物中PAHs的分布与原煤相似，煤气化过程中PAHs的总含量高于原煤（C除外）。随着煤中固定碳和硫含量的增加，总PAHs含量先增加后减少，而挥发物含量增加时却有相反的变化。随着煤气化过程中灰分含量的增加或热值的下降，PAHs的数量减少。

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