炼焦配煤热解过程多环芳烃生成机制研究
张国强 , 金会丽 , 牟玲 , 郭改梅 , 梁思宇 , 张谦 , 毕一杰
现代化工 ›› 2026, Vol. 46 ›› Issue (S1) : 256 -261.
炼焦配煤热解过程多环芳烃生成机制研究
Study on the formation mechanism of polycyclic aromatic hydrocarbons during pyrolysis of coking blended coal
为探讨炼焦配煤热解过程多环芳烃(PAHs)的生成机理,采集山西某焦化厂配煤样品,利用气相色谱-质谱联用仪(GC-MS)和热裂解-气相色谱-质谱联用仪(PY-GC-MS)分别对配煤中的游离PAHs和热解生成的PAHs进行分析。配煤中游离PAHs浓度为(23.6±4.5)μg/g,其中菲(29.0%)和芴(15.9%)浓度最高,环数分布以3~5环PAHs为主。配煤热解PAHs与游离PAHs的质量比为66.7,表明游离PAHs对配煤热解过程PAHs的生成影响较小,而PAHs及苯的衍生物、酚类物质等芳烃化合物,和长链或环状脂肪族化合物等前驱物经热解反应对于PAHs的生成贡献较大。配煤热解过程PAHs生成机理主要包括配煤游离PAHs的挥发释放、煤热解过程的裂解反应和缩聚反应及协同效应。
To investigate the formation mechanism of polycyclic aromatic hydrocarbons (PAHs) in the pyrolysis process of coking blended coal,blended coal samples were collected from a coking plant in Shanxi Province.The free PAHs in the blended coal and the PAHs generated from pyrolysis were analyzed using gas chromatography-mass spectrometry (GC-MS) and pyrolysis-gas chromatography-mass spectrometry (PY-GC-MS),respectively.The concentration of free PAHs in blended coal was 23.6±4.5 μg/g,with the highest concentrations of Phe (29.0%) and Flu (15.9%).The number of rings was mainly 3-5 ring PAHs.The ratio of pyrolysis PAHs to free PAHs in blended coal is 66.7,indicating that free PAHs have little effect on the formation of PAHs during blended coal pyrolysis,while aromatic compounds such as PAHs and benzene derivatives,phenols and long-chain or cyclic aliphatic compounds can be used as precursors to contribute to the formation of PAHs through pyrolysis reaction.The formation mechanism of PAHs in the pyrolysis process of blended coal mainly includes the volatilization and release of free PAHs in blended coal,the cracking reaction of coal pyrolysis process,the polycondensation reaction and the synergistic effect of blended coal pyrolysis process.
焦化过程 / 配煤 / 热解 / PY-GC-MS / 多环芳烃 / 生成机理
coking process / blended coal / pyrolysis / PY-GC-MS / polycyclic aromatic hydrocarbons / formation mechanism
| [1] |
|
| [2] |
|
| [3] |
|
| [4] |
国家统计局. 中国统计年鉴[M]. 北京: 中国统计出版社, 2022. |
| [5] |
牟玲. 机械炼焦过程主要大气污染物排放特征及迁移行为研究[D]. 太原: 太原理工大学, 2013. |
| [6] |
|
| [7] |
谢克昌, 赵炜. 煤化工概论[M]. 北京: 化学工业出版社, 2012. |
| [8] |
曹建磊. 混合焦煤在配煤炼焦中的应用研究[D]. 唐山: 华北理工大学, 2021. |
| [9] |
|
| [10] |
孔娇, 程柱, 董洁, |
| [11] |
程柱. 煤热解过程多环芳烃生成规律研究[D]. 太原: 太原理工大学, 2010. |
| [12] |
|
| [13] |
|
| [14] |
许国梁. 炼焦过程中多环芳烃(PAHs)排放特性研究[D]. 太原: 太原理工大学, 2011. |
| [15] |
|
| [16] |
|
| [17] |
何选明, 黄鹂, 韩军, |
| [18] |
焦海丽. 原煤中可抽提多环芳烃(PAHs)及其热解特性[D]. 太原: 太原理工大学, 2010. |
| [19] |
董洁, 李凡, 谢克昌. 煤转化过程中多环芳烃排放的研究现状[J]. 现代化工, 2009, 29(S1):344-346. |
| [20] |
|
| [21] |
董洁. 煤热解过程中PAHs的形成及其催化裂解特性[D]. 太原: 太原理工大学, 2013. |
| [22] |
|
| [23] |
|
| [24] |
尤孝方. 燃烧过程中多环芳烃的生成与数值模拟[D]. 杭州: 浙江大学, 2006. |
| [25] |
祁明峰. 煤燃烧过程中多环芳烃生成机理和控制实验研究[D]. 杭州: 浙江大学, 2003. |
| [26] |
傅钢. 煤燃烧过程中多环芳烃类有机污染物排放特性的研究[D]. 杭州: 浙江大学, 2002. |
| [27] |
|
| [28] |
|
| [29] |
|
| [30] |
|
山西省重点研发计划项目(202402020101002)
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