First high-resolution 11B nuclear magnetic resonance (NMR) spectra of coal fly ash by satellite-transition magic angle spinning (STMAS) NMR

Takafumi Takahashi, Shunsuke Kashiwakura, Koji Kanehashi, Tetsuya Nagasaka

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

A study was conducted to demonstrate the first high-resolution 11B nuclear magnetic resonance (NMR) spectra for coal fly ash (CFA) by satellite-transition magic angle spinning (STMAS) NMR. Two kinds of CFA, such as N-CFA and W-CFA were provided by a Japanese coal-fired plant to be used for performing the solid-state NMR investigations. Major chemical compositions of the two kinds CFAs were similar with different concentrations of calcium. 11B NMR and STMAS spectra were acquired using a 16.4 T narrow bore magnet equipped with a home-built STMAS probe that was able to generate rf field strengths of up to 200 kHz for 11B. The STMAS probe equipped with a MAS controller achieved stable rotor spinning and long-term keeping of an accurate magic angle. A double quantum filter (DQF) was also employed to eliminate the undesired signals arising from central transition (CT)-CT transfer and any outer satellite-transition-CT transfer.

Original languageEnglish
Pages (from-to)1778-1780
Number of pages3
JournalEnergy and Fuels
Volume23
Issue number3
DOIs
Publication statusPublished - 2009 Mar 19

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Fuel Technology
  • Energy Engineering and Power Technology

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