Characterization of Middle-Temperature Gasification Coal Tar. Part 2: Neutral Fraction by Extrography Followed by Gas Chromatography–Mass Spectrometry and Electrospray Ionization Coupled with Fourier Transform Ion Cyclotron Resonance Mass Spectrometry
Long, H; Shi, Q; Pan, Na; Zhang, Y; Cui, D; Chung, KH; Zhao, S; Xu, C; ,
| HERO ID | 8310616 |
|---|---|
| In Press | No |
| Year | 2012 |
| Title | Characterization of Middle-Temperature Gasification Coal Tar. Part 2: Neutral Fraction by Extrography Followed by Gas Chromatography–Mass Spectrometry and Electrospray Ionization Coupled with Fourier Transform Ion Cyclotron Resonance Mass Spectrometry |
| Authors | Long, H; Shi, Q; Pan, Na; Zhang, Y; Cui, D; Chung, KH; Zhao, S; Xu, C; , |
| Journal | Energy and Fuels |
| Page Numbers | 3424-3431 |
| Abstract | A commercial lignite gasification-derived middle-temperature coal tar (MTCT) was subjected to acid base extraction to obtain acidic, basic, and neutral fractions. The neutral fraction was characterized by mass spectrometry (MS) for hydrocarbon-group-type analysis and further fractionated by extrography into six subfractions, which were characterized by gas chromatography mass spectrometry (GC-MS). Saturate, aromatic, and resin fractions of the neutral fraction accounted for 16.4, 47.6, and 36.0 wt %, respectively. The GC-MS analysis showed that the first neutral subfraction (15.7 wt %) contained alkanes, alkenes, and cycloalkanes; the second subfraction (52.0 wt %) contained 1-6-ring aromatics; the third subfraction (4.6 wt %) contained neutral nitrogen compounds, such as indoles, carbazoles, and benzocarbazoles; the fourth subfraction (8.2 wt %) contained neutral polar compounds, such as C-8-C-28 alkyl nitriles and aliphatic and aromatic ketones, such as 4-, 5-, and 6-ketones and phenyl ketones, derived from a series of propiophenone to decanophenone; the fifth subfraction (14.9 wt %) contained 2-ketones and aromatic ketones, such as acetophenones, indanones, and acetonaphthones; and most of the sixth subfraction (1.3 wt %) cannot be eluted from GC. Electrospray ionization (ESI) coupled with Fourier transform ion cyclotron resonance mass spectrometry (FT-ICR MS) was used to analyze the third neutral subfraction, which was enriched with neutral nitrogen compounds. In addition to indoles, carbazoles, and benzocarbazoles, FT-ICR MS analysis showed that dibenzocarbazoles and tribenzocarbazoles with various carbon numbers were present in the third neutral subfraction. |
| Doi | 10.1021/ef2020167 |
| Wosid | WOS:000305444400033 |
| Url | https://pubs.acs.org/doi/10.1021/ef2020167 |
| Is Certified Translation | No |
| Dupe Override | No |
| Is Public | Yes |