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研究生:黃大維
研究生(外文):Da-Wei Huang
論文名稱:以掃流過濾分離蒸爆液中醣類與抑制物之研究
論文名稱(外文):Separation of saccharides and inhibitors from steam explosion liquids vis cross-flow filtration
指導教授:余琬琴
指導教授(外文):Wan-chin Yu
口試委員:李慧君蘇昭瑾
口試日期:2012-07-13
學位類別:碩士
校院名稱:國立臺北科技大學
系所名稱:有機高分子研究所
學門:工程學門
學類:化學工程學類
論文種類:學術論文
論文出版年:2012
畢業學年度:100
語文別:中文
論文頁數:109
中文關鍵詞:奈米過濾掃流葡萄糖木糖醋酸糠醛
外文關鍵詞:nanofiltrationcross-flowglucosexyloseacetic acidfurfural
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  • 被引用被引用:3
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  • 下載下載:17
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木質纖維素物質是地球上含量最豐富的可再生資源,我們可藉由蒸煮爆碎法將其中的半纖維素部分降解成糖類溶於液體當中,但是有部分的纖維素以及半纖維素會過度過降解成抑制物,需將抑制物去除。
本實驗選用掃流過濾法將抑制物從液體當中去除,為了確定此方法的可行性,先配製與蒸爆液體濃度相同的樣品,測試影響分離效果的變因,包括溫度、掃流流速、壓力、pH值等,找出糖類與抑制物分離效果最佳的條件。
由實驗結果顯示,pH值對醋酸在過濾時有相當大的影響,而對葡萄糖、木糖、木寡糖、HMF、furfural等成分無影響。木寡醣濃度提高時,部分木二糖會因分子間的擠壓而透過濾膜,如要進行濃縮需考慮其濃度影響;醋酸以及HMF在適當的實驗條件下皆能完全透過濾膜分離,而furfural則是在任何實驗條件下其保留率幾乎為定值31%,透過濃縮應能完全除去。仿蒸爆液的實驗樣品在木寡醣濃度20 g/L、掃流速度0.22 m/s,壓力5 bar下有最佳的分離效果,木寡醣保留率92%、醋酸保留率-24%,HMF保留率-833%,furfural保留率30%。


Lignocellulosic biomass is the most abundant renewable resources on earth, the hemicelluloses can partially degraded into saccharides with steam explosion. However, some cellulose and hemicelluloses will be excessive degradation into inhibitors, we must be remove the inhibitors.
In this study, we using nanofiltration to remove the inhibitors. In order to determine the feasibility of this method, we prepare the model solutions that similar to the steam explosion liquids, then we test the impact of separation of variables. The variables include temperature, crossflow rate, pressure and pH, to find the best separation condition of the saccharides and inhibitors.
From the results of the experimentals, pH has a great influence of acetic acid during the cross-flow filtration, but no effect for glucose, xylose, xylooligosaccharide, HMF and furfural. When the xylooligosaccharide concentration rises, the xylobiose can partially through the membrane by the intermolecular squeeze, if you want to concentrate the xylooligosaccharide liquids, you need to consider the effect of the xylooligosaccharide concentration. In the appropriate experimental conditions, HMF and acetic acid can entirely separate via cross-flow filreation. furfural’s retention maintain as a fixed value 31% in any experimental conditions, by the concentrate process, furfurals should be removed completely.
The model solution of steam explosion liquid has the optimum inhibitors separation performance at xylooligosaccharide concertration 20 g/L, cross-flow rate 0.22 m/s, pressure 5 bar, the observed retention of xylooligosaccharides, acetic acid, HMF, furfural were 92%, -24%, -833%, 30%, respectively.


目 錄

摘 要 i
Abstract ii
誌 謝 iv
目 錄 v
第一章 緒論 1
1.1前言 1
1.2研究動機 2
1.3研究目的 3
第二章 文獻回顧 4
2.1生質能的定義以及生物精煉 4
2.2 狼尾草 5
2.3 狼尾草的組成 6
2.3.1 木質纖維素 6
2.3.2 纖維素 8
2.3.3 半纖維素 9
2.3.4 木質素 9
2.4 木寡糖 11
2.4.1 木寡醣簡介 11
2.4.2 木寡醣結構 11
2.4.3 木寡醣結構 12
2.4.4 木寡醣結構 13
2.5 木寡糖的生產方法 14
2.5.1 化學法 14
2.5.2 生物法 15
2.5.3 物理化學法 16
2.5.4 蒸煮爆碎法 18
2.6 木寡糖純化法 19
2.6.1 化學法 19
2.6.2 液相管柱層析法 20
2.6.3 吸附劑吸附法 23
2.6.4 減壓濃縮法 23
2.6.5 溶劑沉澱法 24
2.6.6 膜過濾法及掃流過濾簡介 24
2.7 不同純化法之測試結果 29
2.8 掃流過濾應用至糖類與抑制物分離 32
第三章 材料與方法 36
3.1 實驗儀器與設備 36
3.2 實驗藥品 39
3.3 掃流過濾影響因子 40
3.4 實驗流程 40
3.5 分析方法 41
第四章 結果與討論 44
4.1 純水之濾液通量 44
4.2 不同pH值下醋酸之保留率 45
4.3 葡萄糖、木糖與醋酸混合液之保留率 47
4.4 葡萄糖、木糖與三種抑制物混合液之保留率 56
4.5 葡萄糖、木糖、木寡醣與醋酸混合液之保留率 71
4.6 葡萄糖、木糖、木寡醣與三種抑制物混合液之保留率 83
4.7 混合液體加入木寡醣前後之濾液通量比較 101
第五章 結論 103
參考文獻 104



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