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高温in-situ EPRを用いた石炭の軟化溶融・再固化過程の評価
| Title: | 高温in-situ EPRを用いた石炭の軟化溶融・再固化過程の評価 |
| Other Titles: | High Temperature EPR Study on the Thermoplastic and Re-solidification Phenomenon of Coal upon Heating |
| Authors: | 熊谷, 治夫1 Browse this author →KAKEN DB | | 下山, 泉2 Browse this author | | 原田, 靖之3 Browse this author |
| Authors(alt): | Kumagai, Haruo1 | | Shimoyama, Izumi2 | | Harada, Yasuyuki3 |
| Keywords: | coal | | in-situ EPR spectroscopy | | thermoplasticity | | re-solidification |
| Issue Date: | 1-Mar-2006 |
| Publisher: | 日本鉄鋼協会 |
| Journal Title: | 鉄と鋼 |
| Volume: | 92 |
| Issue: | 3 |
| Start Page: | 122 |
| End Page: | 126 |
| Publisher DOI: | 10.2355/tetsutohagane1955.92.3_122 |
| Abstract: | High temperature in-situ EPR studies were carried out to evaluate the thermoplastic and re-solidification characteristics of coal during heat treatment. The change in EPR spectra up on heating demonstrated the differences of coking properties of sample coals. The peak-to-peak height, ΔIpp, of spectra for coking coals showed minimum value at around the maximum fluidity temperature. This decreases in ΔIpp is supposed to result from the relaxation of aggregate structure of coal molecules. At higher temperature range, above the re-solidification temperature of sample coals, the peak-to-peak line width, ΔHpp, decreased with increase in temperature. Since the ΔHpp, is affected with spin-hydrogen interaction and spin exchange interaction, the decreases in the value of ΔHpp indicate the development of polyaromatic structure during heat treatment. In order to evaluate the coking properties of coal quantitatively, curve fitting was attempted for the EPR spectra obtained during heat treatment. The EPR spectra were deconvoluted into three components. The change in spin concentrations calculated from the components clearly exhibited the differences of coking properties of sample coals. |
| Rights: | 著作権は日本鉄鋼協会にある |
| Type: | article |
| URI: | http://hdl.handle.net/2115/79503 |
| Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
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Submitter: 熊谷 治夫
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