Analysis of water in Loy Yang brown coal using solid-state 1H NMR

Hyun Seok Kim, Yusuke Nishiyama, Keiko Ideta, Jin Miyawaki, Yohsuke Matsushita, Joo Il Park, Isao Mochida, Seong Ho Yoon

Research output: Contribution to journalArticle

13 Citations (Scopus)

Abstract

1H spin-echo MAS NMR and 1H saturated spin-echo MAS NMR were applied to classify the water in Loy Yang coal. Adsorbed water was examined based on the proton spectra, in which four major portions were identified according to the moisture contents. Free water could be quantified by analyzing the proton free induction decays (FIDs) obtained using the 1H saturated spin-echo technique. By comparing the proton intensity of the CH portion to the aromatic and N portion in the proton spectra, and by evaluating the FIDs, the water in Loy Yang coal could be classified.

Original languageEnglish
Pages (from-to)1673-1679
Number of pages7
JournalJournal of Industrial and Engineering Chemistry
Volume19
Issue number5
DOIs
Publication statusPublished - 2013 Sep 25
Externally publishedYes

Keywords

  • Adsorbed water
  • Loy Yang brown coal
  • Spin-echo MAS NMR

ASJC Scopus subject areas

  • Chemical Engineering(all)

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  • Cite this

    Kim, H. S., Nishiyama, Y., Ideta, K., Miyawaki, J., Matsushita, Y., Park, J. I., Mochida, I., & Yoon, S. H. (2013). Analysis of water in Loy Yang brown coal using solid-state 1H NMR. Journal of Industrial and Engineering Chemistry, 19(5), 1673-1679. https://doi.org/10.1016/j.jiec.2013.02.005