Comprehensive database of Manufactured Gas Plant tars – Part B Aliphatic and aromatic compounds

Christopher Gallacher, Russell Thomas, Richard Lord, Robert M. Kalin, Chris Taylor

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Rationale

Coal tars are a mixture of organic and inorganic compounds and were produced as a by-product from the manufactured gas and coke making industries. The composition of the tar produced varied 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 5 different production processes.

Methods

Samples of coal tar were extracted using accelerated solvent extraction (ASE) and derivatized post extraction using BSTFA with 1% TMCS. The derivatized 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 5 different production processes. The 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 ws 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.
LanguageEnglish
Pages1239-1249
Number of pages11
JournalRapid Communications in Mass Spectrometry
Volume31
Issue number15
Early online date11 May 2017
DOIs
Publication statusPublished - 15 Aug 2017

Fingerprint

Tars
Gas plants
Aromatic compounds
tar
gas
Coal Tar
coal tar
Cyclohexanes
Chemical analysis
aromatic compound
aliphatic compound
Inorganic compounds
inorganic compound
Solvent extraction
Polycyclic aromatic hydrocarbons
Organic compounds
Coke
Gas chromatography
Chemical properties
Mass spectrometry

Keywords

  • GCxGC/TOFMS
  • coal tar
  • environmental forensics
  • derivatization
  • aliphatic compounds
  • aromatic compounds

Cite this

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title = "Comprehensive database of Manufactured Gas Plant tars – Part B Aliphatic and aromatic compounds",
abstract = "RationaleCoal tars are a mixture of organic and inorganic compounds and were produced as a by-product from the manufactured gas and coke making industries. The composition of the tar produced varied 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 5 different production processes.MethodsSamples of coal tar were extracted using accelerated solvent extraction (ASE) and derivatized post extraction using BSTFA with 1{\%} TMCS. The derivatized samples were analysed using two-dimensional gas chromatography combined with time-of-flight mass spectrometry (GCxGC/TOFMS).ResultsA total of 198 individual aliphatic and 951 individual aromatic compounds were detected within 16 tar samples produced by 5 different production processes. The 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.ConclusionsThe aromatic compositions of the tar samples varied greatly between the different production processes investigated and useful analytical information ws 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.",
keywords = "GCxGC/TOFMS, coal tar, environmental forensics, derivatization, aliphatic compounds, aromatic compounds",
author = "Christopher Gallacher and Russell Thomas and Richard Lord and Kalin, {Robert M.} and Chris Taylor",
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Comprehensive database of Manufactured Gas Plant tars – Part B Aliphatic and aromatic compounds. / Gallacher, Christopher; Thomas, Russell; Lord, Richard; Kalin, Robert M.; Taylor, Chris.

In: Rapid Communications in Mass Spectrometry , Vol. 31, No. 15, 15.08.2017, p. 1239-1249.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Comprehensive database of Manufactured Gas Plant tars – Part B Aliphatic and aromatic compounds

AU - Gallacher, Christopher

AU - Thomas, Russell

AU - Lord, Richard

AU - Kalin, Robert M.

AU - Taylor, Chris

N1 - This is the peer reviewed version of the following article: Gallacher, C., Thomas, R., Lord, R., Kalin, R. M., & Taylor, C. (2017). Comprehensive database of Manufactured Gas Plant tars – Part B Aliphatic and aromatic compounds. Rapid Communications in Mass Spectrometry, which has been published in final form at https://doi.org/10.1002/rcm.7900. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Self-Archiving

PY - 2017/8/15

Y1 - 2017/8/15

N2 - RationaleCoal tars are a mixture of organic and inorganic compounds and were produced as a by-product from the manufactured gas and coke making industries. The composition of the tar produced varied 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 5 different production processes.MethodsSamples of coal tar were extracted using accelerated solvent extraction (ASE) and derivatized post extraction using BSTFA with 1% TMCS. The derivatized samples were analysed using two-dimensional gas chromatography combined with time-of-flight mass spectrometry (GCxGC/TOFMS).ResultsA total of 198 individual aliphatic and 951 individual aromatic compounds were detected within 16 tar samples produced by 5 different production processes. The 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.ConclusionsThe aromatic compositions of the tar samples varied greatly between the different production processes investigated and useful analytical information ws 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.

AB - RationaleCoal tars are a mixture of organic and inorganic compounds and were produced as a by-product from the manufactured gas and coke making industries. The composition of the tar produced varied 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 5 different production processes.MethodsSamples of coal tar were extracted using accelerated solvent extraction (ASE) and derivatized post extraction using BSTFA with 1% TMCS. The derivatized samples were analysed using two-dimensional gas chromatography combined with time-of-flight mass spectrometry (GCxGC/TOFMS).ResultsA total of 198 individual aliphatic and 951 individual aromatic compounds were detected within 16 tar samples produced by 5 different production processes. The 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.ConclusionsThe aromatic compositions of the tar samples varied greatly between the different production processes investigated and useful analytical information ws 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.

KW - GCxGC/TOFMS

KW - coal tar

KW - environmental forensics

KW - derivatization

KW - aliphatic compounds

KW - aromatic compounds

U2 - 10.1002/rcm.7900

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VL - 31

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EP - 1249

JO - Rapid Communications in Mass Spectrometry

T2 - Rapid Communications in Mass Spectrometry

JF - Rapid Communications in Mass Spectrometry

SN - 0951-4198

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