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研究生:楊凱成
研究生(外文):Kai-Cheng Yang
論文名稱:生質物於流體化床進行蒸汽氣化之研究
論文名稱(外文):Steam Gasification of Biomass in a Fluidized Bed
指導教授:吳耿東
學位類別:碩士
校院名稱:國立中興大學
系所名稱:森林學系所
學門:農業科學學門
學類:林業學類
論文種類:學術論文
論文出版年:2009
畢業學年度:97
語文別:中文
論文頁數:69
中文關鍵詞:生質物氣化合成氣蒸汽
外文關鍵詞:biomassgasificationsyngassteam
相關次數:
  • 被引用被引用:9
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  • 收藏至我的研究室書目清單書目收藏:1
氣化係指在高溫下進行進行部分氧化反應,將含碳物質轉換成以氣態燃料為主之加工程序。本研究以針葉樹樹種杉木(Cunninghamia lanceolata Hook.)、二葉松(Pinus taiwanensis Hay.)及闊葉樹樹種相思樹(Acacia confusa Merr.)為木質生質物燃料,於30 kWth氣泡式流體化床氣化爐進行氣化研究,探討操作變數,如溫度、空氣等值比,對生質物氣化產生的合成氣組成影響,並添加蒸汽與改變注入蒸汽位置,討論是否對生質物氣化產生的合成氣有所改變。由實驗結果得知,在氣化條件ER值為0.3時,隨溫度增加,氣化合成氣中熱值下降,H2/CO比例上升。在氣化溫度800oC及900oC條件下,隨空氣等值比的增加,生質物氣化合成氣中CO、H2與CH4含量下降而CO2含量上升,而合成氣中的熱值與產率則隨空氣等值比的增加而下降。注入蒸汽時,空氣等值比(equivalent ratio, ER)與溫度對生質物氣化合成氣的影響,與未注入蒸汽時生質物氣化合成氣有相同趨勢,但合成氣的熱值與H2含量以有注入蒸汽時較高。
Gasification can be defined as the conversion procedure of carbonaceous feedstock, by partial oxidation at elevated temperature. In this study, gasification of wood-based materials including Cunninghamia lanceolata Hook., Pinus taiwanensis Hay., and Acacia confusa Merr., were conducted in a 30 kWth bubbling fluidized bed gasification system to investigate the effect of operating conditions on syngas products. The effect of steam injection was also discussed. The results show that the heating value of syngas decreases and the H2/CO ratio increases with increasing the gasification temperature. It can also be found that the yields of syngas, CO, H2 and CH4, decrease with increasing the ER respectively, but that of CO2 shows the contrary results. The variation of gas composition is not conspicuous, when the steam was injected into the gasifier. However, the heating value of the syngas and H2 content increase after injecting the steam.
摘要 i
SUMMARY ii
目錄 iii
表目次 v
圖目次 vi
第一章 前言 1
第二章 文獻回顧 3
2.1 氣化定義 3
2.2 氣化技術的演進 5
2.3 氣化爐的種類 6
2.4 生質物氣化操作參數 11
第三章 實驗設備及操作方法 20
3.1 實驗設備 20
3.2 燃料與床砂之性質 26
3.3 實驗變數與操作條件 28
第四章 結果與討論 30
4.1 溫度的影響 30
4.2 ER值的影響 36
4.3 蒸汽注入的影響 44
4.4 蒸汽注入位置 47
第五章 結論與建議 51
參考文獻 53
附錄A GC分析氣體之閥件原理 58
附錄B 樣品檢測分析方法 63
附錄C 30 kWth氣泡式流體化床氣化操作方法 64
作者自述 67
學術著作 68
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