- 學位論文
以麻瘋樹種子製成之活性碳對揮發性有機化合物吸附之研究
Adsorption of volatile organic compounds(VOCs) by activated carbon produced from jatropha curcas seeds
摘要
本研究採用麻瘋樹種子做為製備活性碳的原料，並與文獻之製備方法做比較而後針對六種含氯之揮發性有機化合物(四氯化碳、氯仿、二氯甲烷、四氯乙烯、三氯乙烯、氯苯)進行吸附之研究。利用重量測定法進行實驗與計算求得六種揮發性有機物對活性碳的等溫吸附曲線並以Langmuir model回歸實驗數據。影響吸附量之主要因素為：分子量、極性以及立體結構。本研究針對含氯之揮發性有機化合物進行吸附實驗的目的在於探討分子中含氯離子的多寡對吸附量之影響。 由實驗結果得知分子中含氯離子數量越多活碳性的吸附量也呈現正比的趨勢，證明了分子量越大吸附量也會增加。而分子中具有相同氯離子的數目可是鍵結中含有雙鍵的化合物(四氯化碳vs四氯乙烯、三氯甲烷vs三氯乙烯)在吸附量來說並沒有很顯著的差別，證明了雙鍵的存在對於分子的吸附量影響並沒有分子量來的明顯。實驗最後也針對活性碳進行再生的實驗，其目的在於證明本實驗自製活性碳的重覆使用性。從實驗結果得知，在進行3次再生後，活性碳的吸附能力並沒有很顯著的下降，也證明了其重覆使用的可能性。
並列摘要
In this study, Jatropha curcas seeds was uesd as raw material for producing activated carbon, and compared the production methods of activated carbon with previous study. The adsorption experiments of six chlorinated volatile organic compounds (carbon tetrachloride, chloroform, dichloromethane, tetrachloroethylene, trichloroethylene, chlorobenzene ) were selected. Use gravimetric adsorption to get adsorption isotherms of the six chlorinated volatile organic compounds. The main factors that affecting the adsorption uptake are molecular weight, polarity and structure. The purpose of this study is focusing on the adsorption of chlorinated volatile organic compounds, and to discuss the effect between number of chloride ion in molecular and adsorption uptake. Results from this study indicated that with the increasing number of chloride ion, the adsorption amount of activated carbon also increased. It means the adsorption amount increased with increasing molecular weight. There is no significant difference of adsorption amount between molecules with same number of chlorine ion but existence of double bond (carbon tetrachloride vs tetrachloroethylene, chloroform vs trichloroethylene). The influence of molecular weight is more important then the existence of double bond within structure. There was the regeneration experiment of activated carbon, the purpose was to prove it could be reused. From the results, the adsorption capacity of activated carbon did not decrease significantly after three times of regeneration, and it proved it may have ability to be reused .