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水滑石固體鹼催化纖維素水解 = Solid Base Catalysis...

國立高雄大學應用化學系碩士班

水滑石固體鹼催化纖維素水解 = Solid Base Catalysis of Cellulose Conversion over Hydrotalcite Catalyst

紀錄類型:	書目-語言資料,印刷品 : 單行本
並列題名:	Solid Base Catalysis of Cellulose Conversion over Hydrotalcite Catalyst
作者:	鄭守志,
其他團體作者:	國立高雄大學
出版地:	[高雄市]
出版者:	撰者;
出版年:	2014[民103]
面頁冊數:	168面圖，表 : 30公分;
標題:	纖維素
標題:	Cellulose
電子資源:	http://handle.ncl.edu.tw/11296/ndltd/25203984823403455787
附註:	參考書目：面134-142
附註:	103年12月16日公開
摘要註:	纖維素是近年來熱門的生質能材料之一，為了解決即將面臨的石化燃料不足以及所排放的二氧化碳造成的溫室效應，尋找一新替代能源成為重要課題。纖維素酸性水解所產生的相關衍生物如葡萄糖和5-hydrxoymethylfurfural(HMF)在目前工業界都有廣泛的應用，相反地，纖維素在鹼性環境下水解出特定產物的文獻卻只有少數，目前是使用氫氧化鈉進行勻相催化來辨別其產物結構與推測反應機制，因此，利用固體鹼催化纖維素得到單一性的產物，仍具有很大的發展空間。本次研究利用水滑石(LDH)催化纖維素的水解，經由不同的催化環境與參數探討如何得出較高選擇率的單一產物以及研究主要的形成機制，並由上述得知何種反應環境與觸媒特質利於目標產物的生成。吾人設計四種不同反應環境: 水熱式反應、物理式二相系統、前處理效應和薄膜式觸媒系統，在水熱反應中吾人探討了部分效應來推測其反應路徑與檢視水滑石觸媒改質後的催化特性；而在物理二相系統中改以蒸氣式代替水相接觸進行纖維素的水解，並輔以酸鹼共軛的想法觀察主產物與反應路徑的變化；前處理效應，參考文獻中將纖維素降低結晶度提高反應性的作法，應用在此觸媒系統；薄膜式觸媒系統，經過粉體水滑石的催化表現，吾人預期在新做法的觸媒系統上能有相同的催化效能，綜合以上，吾人藉由觀察產物分布來判斷反應路徑的走向，輔以文獻的閱讀與部分實驗來推測其路徑的產生並預期得到高選擇性表現。 In recent years, cellulose has becoming the most polpular materials of all renewable energy, in order to resolve the problem on lacking of fossil fuels and avoiding the green house phenomenon from CO2 emissions, searching for a new generation resource is becoming a crucial issue. Cellulose conversion through acid hydrolysis produces the related derivatives, ex: glucose and 5-hydroxymethylfurfural(HMF), both of them have widely used in present industry. On the contrary, the references in alkaline hydrolysis are still less mentioned, as a result, using base catalyst to get the selective products on cellulose conversion, it still exist a lot of treasure to discover it.This research explored that hydrotalcite-like solid base catalyst could hydrolyze cellulose into platform molecules, by means of participating in different environment and adjusting some parameters to investigate how to get the higher selectivity of product and what is the mechanism. Therefore, we could know what kinds of situations could be benefit for the formation of main products. Our group designed 4 kinds of experiments: hydrothermal, physically two-phase system, pretreatment and thin-film system. First of all, in hydrothermal reactions, we discuss some effect to observe the distributions of products and examine the feature of catalyst to asure the catalytic performance. Secondly, in physically two-phase system, we utilize the steam way to replace contacting with water phase on cellulose conversion, correlated with acid-base conjugated catalysis to observe the product yield. Thirdly, according to the literature, we know that decreasing the crystallinity of cellulose could rise up the conversion, so we use in this system. Finally, we design an interesting experiment that what is gonna to happen on cellulose conversion if hydrotalcite could growed on film. Above all, we observe the distribution to judge what the reactions favor for and read some articles so that we could get the higher lactic acid selectivity.

水滑石固體鹼催化纖維素水解 = Solid Base Catalysis of Cellulose Conversion over Hydrotalcite Catalyst
鄭, 守志

水滑石固體鹼催化纖維素水解 = Solid Base Catalysis of Cellulose Conversion over Hydrotalcite Catalyst / 鄭守志撰 - [高雄市] : 撰者, 2014[民103]. - 168面 ; 圖，表 ; 30公分.
參考書目：面134-142103年12月16日公開.
纖維素Cellulose

水滑石固體鹼催化纖維素水解 = Solid Base Catalysis of Cellulose Conversion over Hydrotalcite Catalyst
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