Comprehensive database of Manufactured Gas Plant tars. Part B. Aliphatic and aromatic compounds.
Comprehensive database of Manufactured Gas Plant tars. Part B. Aliphatic and aromatic compounds.
复制标题
天然气工厂焦油综合数据库。
DOI：
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复制
发表时间：
2017
影响因子：
2
通讯作者：
C. Taylor
中科院分区：
文献类型：
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作者：
Christopher Gallacher;Russell Thomas;R. Lord;R. Kalin;C. Taylor
基本原理
煤焦油是有机和无机化合物的混合物，是人造煤气和焦炭制造行业的副产品。产生的焦油的成分取决于许多因素；这些包括生产温度和使用的蒸馏器类型。由于不同的生产工艺产生不同的焦油，因此来自不同生产工艺的煤焦油中存在的化合物的综合数据库是宝贵的资源。这样的数据库将有助于了解它们的化学性质有何不同以及这些焦油中存在的化合物可能造成哪些危害。本研究重点关注来自五种不同生产工艺的 16 种不同焦油的数据库中存在的脂肪族和芳香族化合物。
方法
使用加速溶剂萃取 (ASE) 萃取煤焦油样品，并使用 N,O-双(三甲基甲硅烷基)三氟乙酰胺 (BSTFA) 和 1% 三甲基氯硅烷 (TMCS) 进行衍生化后萃取。使用二维气相色谱结合飞行时间质谱 (GCxGC/TOFMS) 分析衍生样品。
结果
在五种不同生产工艺生产的 16 个焦油样品中总共检测到 198 种脂肪族化合物和 951 种芳香族化合物。煤焦油的多环芳烃 (PAH) 含量根据焦油生产工艺的不同而变化很大，结果清楚地表明了这一点。焦油的脂肪族成分提供了一条重要的分析信息，否则在检测烷基环己烷等成岩化合物时可能会错过这些信息。
结论
所研究的不同生产工艺之间焦油样品的芳香族成分差异很大，并且获得了有关各个生产工艺组的有用分析信息。在已知运行化水煤气装置的地点的所有样品中均检测到烷基环己烷，而在未运行的地点未检测到烷基环己烷。这表明英国许多天然气工厂可能会出现石油原料。
RATIONALE
Coal tars are a mixture of organic and inorganic compounds that were produced as a by-product from the manufactured gas and coke making industries. The composition of the tar produced varies depending on many factors; these include the temperature of production and the type of retort used. As different production processes produce different tars, a comprehensive database of the compounds present within coal tars from different production processes is a valuable resource. Such a database would help to understand how their chemical properties differ and what hazards the compounds present within these tars might pose. This study focuses on the aliphatic and aromatic compounds present in a database of 16 different tars from five different production processes.
METHODS
Samples of coal tar were extracted using accelerated solvent extraction (ASE) and derivatised post-extraction using N,O-bis(trimethylsilyl)trifluoroacetamide (BSTFA) with 1% trimethylchlorosilane (TMCS). The derivatised samples were analysed using two-dimensional gas chromatography combined with time-of-flight mass spectrometry (GCxGC/TOFMS).
RESULTS
A total of 198 individual aliphatic and 951 individual aromatic compounds were detected within 16 tar samples produced by five different production processes. The polycyclic aromatic hydrocarbon (PAH) content of coal tars varies greatly depending on the production process used to obtain the tars and this is clearly demonstrated within the results. The aliphatic composition of the tars provided an important piece of analytical information that would have otherwise been missed with the detection of petrogenic compounds such as alkyl cyclohexanes.
CONCLUSIONS
The aromatic compositions of the tar samples varied greatly between the different production processes investigated and useful analytical information was obtained about the individual production process groups. Alkyl cyclohexanes were detected in all samples from sites known to operate Carbureted Water Gas plants and not detected in those that did not. This suggests that petrogenic material may be expected at many UK gaswork sites.