Adsorption of volatile organic compounds(VOCs) by activated carbon produced from jatropha curcas seeds

• Main Authors: Chin-Sheng Huang, 黃進盛
• Other Authors: Tsair-Wang Chung
• Format: Others
• Language: zh-TW
• Published: 2012
• Online Access: http://ndltd.ncl.edu.tw/handle/42266533751215826365

碩士 === 中原大學 === 化學工程研究所 === 100 === 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 .