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研究生： 張智閔
Chang, chih-Min
論文名稱： 煤萃出物提升煤成焦時流動性與強度之研究
Thermoplasticity and strength improvement of coking coal by addition of coal extracts
指導教授： 黃守仁
Whang, Thou-Jen
學位類別： 博士
Doctor
系所名稱： 理學院 - 化學系
Department of Chemistry
論文出版年： 2016
畢業學年度： 104
語文別： 英文
論文頁數： 68
中文關鍵詞： 煤 、焦碳 、芳香性 、萃取 、熱萃取 、熱塑性 、固態碳譜 、多環碳氫化合物 、芳香烴 、X-ray繞射光譜
外文關鍵詞： Aromaticity, 13C-NMR, Coal, Coke, Extracts, Polyaromatic hydrocarbon, Thermal extraction, Thermal plasticity, XRD
相關次數： 點閱：122  下載：3 
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    • 選用雜酚油當主要萃取溶劑，萃取Coal-A(高揮發性強冶金煤)、Coal-B(中揮發性強冶金煤)、Coal-C (低揮發性強冶金煤)、Coal-D (高揮發性弱冶金煤)等四種原煤，之後對其萃出物之基本性質進行分析，含元素分析(EA)、熱重量分析(TGA)、紅外光光譜分析(IR)、流動性測試(Fluidity)、強度測試(Roga Test)等光學分析與熱分析。最後進行萃出物添加於煤樣之實驗，測試其對煤樣流動性與成焦後強度之影響。結果顯示單獨煤樣或混合煤樣添加萃出物後，流動性大小、軟化熔融區間及成焦後強度均有一定程度之改善。接著探討著重於煤樣萃取過程機制，並找出萃出物提供成焦過程流動性與成焦後焦結性之物質及其溫度區間。先使用低沸點之雜酚油(沸點200~300oC)以及NMP(沸點202oC)、Quinoline(沸點237oC)、NMP + Quinoline(1:1 v/v)等以上四種不同溶劑對Coal-D弱冶金煤進行熱萃取，利用元素分析之碳/氫(C/H)比例與熱重分析之重量損耗實驗數據進行交叉比對，以進一步確認煤樣萃出物在不同預處理溫度下熱性質。最後再把不同預處理溫度條件下之萃出物添加於原煤進行流動性測試與焦碳成焦後之強度測試，分析數據並找出成焦過程中萃出物提供流動性與強度之最佳溫度區間。另外，對於萃出物及其添加於煤樣成焦後之焦炭做基本之物性分析，對於成焦變化過程與焦炭品質掌控可有更深入的探討。針對不同預處理溫度條件之萃出物進行元素與熱重分析，獲得萃出物在不同預處理溫度下之相關資訊，並以固態核磁共振光譜(Solid state 13C-NMR)分析各個萃取條件之萃出物圖譜，推論出萃出物與流動性之關聯性，有助於分析原煤與其萃出物之差異性，最後經由X-ray繞射光譜(XRD)與固態核磁共振光譜分析，兩方法對於芳香族碳與脂肪族碳之比例存在一正相關關係。可獲得煤樣萃取過程中進行縮合反應之證據，並用以判定煤樣是否在混合後具提供流動性之依據，並可對於單獨煤樣或是混合煤樣判斷流動性提供一較省時簡易之方法。

    Thermoplasticity and coke strength of individual coals and coal blends were improved byaddition of coal extracts. Thus, this process caused the coals to bind better. Additionally, the strength of coke increased after the addition of 0~10wt% of extracts from various caking coals which are also known as coking coals. This result fully demonstrates that the extracts are a useful binder for coals.
    Various kinds of solvents were used to extract Coal-D caking coal; coal extracts were subsequently added to the raw coals, and the fluidity and coke strength were tested. Solid-state 13C NMR and X-ray diffractometry were used to investigate the coal samples, which gave a direct way to determine the thermoplasticity of coals and to determine whether the fluidity increased after blending. A linear relationship between the aromatic carbon and aliphatic carbon contents was found; therefore, coal apparently condensed with the extracts during the coking process.

    List of Contents 中文摘要.............. I Abstract........... Ⅱ Acknowledgements......... III List of Contents.......... IⅤ List of Tables.......... List of Figures.......... ⅤI VII 0 Research motive......... IX 1 Introduction.......... 1 2 ExperimentalMethod......... 3 2.1 Coal samples......... 3 2.2 Thermal extraction of coals with various solvents..... 5 2.3 Thermogravimetric analyses......... 5 2.4Thermoplasticity........ 6 2.5Roga index – determination of caking power..... 6 2.6 Solid-State 13C Nuclear Magnetic Resonance..... 7 2.7 X-ray diffractometry......... 7 3 Results and discussion......... 7 3.1 Fundamental analysis of the coals and extracts.... 7 3.2 Effect of extracts addition on thermoplasticity..... 11 3.3 Effect of extracts addition on coke strength...... 18 3.4 SEM micrographs of the coke morphology..... 23 3.5 Solid-state nuclear magnetic resonance analysis..... 27 3.6. X-ray diffraction analysis....... 31 4 Conclusions.......... 36 5 Reference.......... 38 6 Appendix........... 42 6.1. Appendix I Comparison table of abbreviation and full names 6.2. Appendix II Table a to d (Original data of Table 2) 6.3. Appendix III Original spectra of Solid-state 13C-NMR contrast to Table 6 6.4. Appendix IV Figure A to L

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