奈米孔隙吸附劑吸附VOCs之吸附平衡研究

Study on the adsorption equilibria of VOCs with nanoporous adsorbents

王卿昧(Ching-Mei Wang)

指導教授 ： 鍾財王

中原大學/工學院/化學工程研究所/碩士(2003年)

https://doi.org/10.6840/cycu200300255

摘要

有機揮發性化合物(Volatile organic compounds, VOCs)具弱極性及高揮發性之特性，容易擴散到空氣中，對於人體健康是一大威脅。因此，本研究利用重量測量法測量具有奈米孔隙之吸附材(活性碳、矽膠、13X分子篩)吸附VOCs(乙酸甲酯、乙酸乙酯、乙酸丙酯、乙酸丁酯、乙酸異丙酯、乙酸異丁酯、苯、甲苯、鄰-二甲苯、間-二甲苯、對-二甲苯)之吸附平衡。此吸附平衡值(uptake)為吸附分離程序中是一個相當重要的基礎數據，且亦是為吸附塔設計時吸附材選用多寡的依據值。Freundlich等溫吸附平衡模式，可被用來間接證明實驗所得之平衡數據與理論計算之數據之間的相關性。由所得之等溫吸附曲線結果可分析VOCs與吸附劑之間的吸附機制與質傳現象。

關鍵字

奈米孔隙吸附劑 ； 吸附性質 ； 吸附平衡等溫曲線 ； 揮發性有機氣體

並列摘要

The properties of low polarity and high volatility make the volatile organic compounds (VOCs) diffusing in the air, and the human health would be harmful easily. Therefore, the study of VOCs adsorbed by nanoporous adsorbents (active carbon, silica gel, and 13X zeolite) was investigated by the equipment of gravimetric adsorption. The adsorbents (VOCs) included methyl acetate, ethyl acetate, propyl acetate, butyl acetate, iso-propyl acetate, iso-butyl acetate, benzene, toluene, o-xylene, p-xylene and m-xylene. The adsorption equilibrium data (uptake) is an important parameter for designing the adsorber, which was acquired from the adsorption equipment and microbalance. The Langmuir and Freundlich model can be used to demonstrate the confidence of the experimental data. The results from the adsorption equilibrium data analyze interactions between adsorbents and adsorbates and discuss the mass transfer phenomena between them successfully.

並列關鍵字

volatile organic compounds ； adsorption isotherm ； adsorption properties ； nanoporous adsorbents

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