Sulfur removal and release behaviors of sulfur-containing model compounds during pyrolysis under inert atmosphere by TG-MS connected with Py-GC

GUO Hui-qing; XIE Li-li; WANG Xin-long; LIU Fen-rong; WANG Mei-jun; HU Rui-sheng

Volume 42 Issue 10

Oct. 2014

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Article Navigation > Journal of Fuel Chemistry and Technology > 2014 > 42(10): 1160-1166

GUO Hui-qing, XIE Li-li, WANG Xin-long, LIU Fen-rong, WANG Mei-jun, HU Rui-sheng. Sulfur removal and release behaviors of sulfur-containing model compounds during pyrolysis under inert atmosphere by TG-MS connected with Py-GC[J]. Journal of Fuel Chemistry and Technology, 2014, 42(10): 1160-1166.

Citation:

GUO Hui-qing, XIE Li-li, WANG Xin-long, LIU Fen-rong, WANG Mei-jun, HU Rui-sheng. Sulfur removal and release behaviors of sulfur-containing model compounds during pyrolysis under inert atmosphere by TG-MS connected with Py-GC[J]. Journal of Fuel Chemistry and Technology, 2014, 42(10): 1160-1166.

Citation:

GUO Hui-qing, XIE Li-li, WANG Xin-long, LIU Fen-rong, WANG Mei-jun, HU Rui-sheng. Sulfur removal and release behaviors of sulfur-containing model compounds during pyrolysis under inert atmosphere by TG-MS connected with Py-GC[J]. Journal of Fuel Chemistry and Technology, 2014, 42(10): 1160-1166.

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Sulfur removal and release behaviors of sulfur-containing model compounds during pyrolysis under inert atmosphere by TG-MS connected with Py-GC

1.
College of Chemistry and Chemical Engineering, Inner Mongolia University, Hohhot 010021, China;
2.
School of Pharmaceutical Science, Inner Mongolia Medical University, Hohhot 010110, China;
3.
Key Laboratory of Coal Science and Technology, Taiyuan University of Technology, Taiyuan 030024, China

Funds: Supported by Natural Science Foundation of China (21466025), the Natural Science Foundation of Inner Mongolia (2013MS0205) and the State Key Laboratory Breeding Base of Coal Science and Technology Co-founded by Shanxi Province and the Ministry of Science and Technology, Taiyuan University of Technology(2014).

Received Date: 2014-05-20
Rev Recd Date: 2014-08-08
Publish Date: 2014-10-30

Abstract

Abstract

Sulfur containing model compounds, tetradecyl mercaptan, dibutyl sulfide, phenyl sulfide, 2-methyl thiophene, benzothiophene and dibenzothiophene, were selected to investigate their sulfur removal and release behaviors during pyrolysis under inert atmosphere by thermo-gravimetric analyzer with mass spectrometer (TG-MS) and pyrolysis connected with gas chromatogram (Py-GC). It was found that the order of sulfur removal was tetradecyl mercaptan > dibutyl sulfide > 2-methyl thiophene > benzo thiophene > phenyl sulfide > dibenzothiophene. Except for phenylsulfide, this rule is contrary to the decomposition temperature order of the sulfur functional groups. SO₂ evolution was detected by MS and GC for all those model compounds and COS evolution was also found except for phenylsulfide and dibenzothiophene; while H₂S evolution was measured only for tetradecyl mercaptan, dibutyl sulfide and 2-methyl thiophene. However, SO₂ content was much higher than H₂S and COS in pyrolysis gas for each model compound, which may be caused by that indigenous hydrogen was much less than indigenous oxygen under inert atmosphere, when actived carbon was used as carrier. Thus, most of sulfur radicals can connect with indigenous oxygen and release in the form of SO₂. For phenyl sulfide, benzothiophene and dibenzothiophene, as their indigenous hydrogen was not enough to react with sulfur radicals, no H₂S was detected during pyrolysis under inert atmosphere, while SO₂ was found and its content was very high in pyrolysis gas.
- pyrolysis,
- sulfur release,
- sulfur-containing model compounds,
- TG-MS,
- Py-GC

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References(25)

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