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- W2364124636 abstract "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:pyridinicN(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 ℃." @default.
- W2364124636 created "2016-06-24" @default.
- W2364124636 creator A5058903508 @default.
- W2364124636 date "2013-01-01" @default.
- W2364124636 modified "2023-09-25" @default.
- W2364124636 title "XPS study on transformation of N-and S-functional groups during pyrolysis of high sulfur New Zealand coal" @default.
- W2364124636 hasPublicationYear "2013" @default.
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