Citation: LI Mei, YANG Jun-he, ZHANG Qi-feng, CHANG Hai-zhou, SUN Hui. XPS study on transformation of N- and S-functional groups during pyrolysis of high sulfur New Zealand coal[J]. Journal of Fuel Chemistry and Technology, ;2013, 41(11): 1287-1293. shu

XPS study on transformation of N- and S-functional groups during pyrolysis of high sulfur New Zealand coal

LI Mei ^1,2 ,
YANG Jun-he ^1,, ,
ZHANG Qi-feng ³ ,
CHANG Hai-zhou ⁴ ,
SUN Hui ⁴

1.
1. School of Materials Science and Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China;

Corresponding author: YANG Jun-he,
Received Date: 22 April 2013
Available Online: 4 June 2013
Fund Project: 国家自然科学基金(21276156)。 (21276156)

X-ray photoelectron spectroscopy (XPS) was used to investigate the nitrogen and sulfur functional forms present in New Zealand coal (NXL) and its pyrolysis char prepared under argon atmosphere at 8 different temperatures between 300 and 1 000℃. The N 1s spectra obtained were curve-resolved into 4 peaks: pyridinic-N (398.8±0.4 eV), pyrrolic-N (400.2±0.3 eV), quaternary-N (401.4±0.3 eV) and nitrogen oxides (402.9±0.5 eV); and S 2p peaks into 6 peaks: pyrite (162.5±0.3 eV), sulphidic (163.3±0.4 eV), thiophenic (164.1±0.2 eV), sulfoxide (166.0±0.5 eV), sulfones (168.0±0.5 eV) and sulfate (169.5±0.5 eV). The results show that nitrogen present in coal in pyrrolic forms is converted into pyridinic functionalities upon heat treatment and nitrogen oxides disappeared above 900℃. The major organic sulfur form in NXL is thiophene and its content is over 50%. Pyrite is decomposed completely into troilite at 600℃.
- XPS,
- high sulfur coal,
- pyrolysis,
- nitrogen transformation,
- sulfur transformation
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