Desorption activation energy of aromas molecules of five types on activated carbon adsorbent

作者：Huang, Yan; Zhou, Yonghui; Zhu, Baokun; Zhao, Zhenxia^*

来源：Journal of Huazhong University of Science and Technology (Natural Science Edition), 2013, 41(10): 119-122.

• Carbon surface
• Damascenone
• Ethyl acetates
• Ethyl matol
• Ethyl vanillin

The desorption activation energy of aroma molecules of five types, such as damascenone, γ-nonalactone, ethyl vanillin, ethyl matol and ethyl acetate on activated carbons were investigated by temperature program desorption (TPD) technique. The TPD experiments were conducted to analyze the interaction of an aroma molecule with adsorbent, and estimate desorption activation energy of these five kinds of aroma molecules on the activated carbons. The effects of the diameter and the polarity of aroma molecules on desorption activation energy were discussed. The results showed that the aroma molecules'diameter has significant influence on desorption activation energies. The desorption activation energies of damascenone, γ-nonalactone, ethyl vanillin, ethyl matol and ethyl acetate are separately 57.92, 55.70, 54.41, 49.83 and 46.34 kJ/mol, which decreases with a decrease in aroma molecules'diameter. The polarity of aroma molecules cannot pay a dominant role in interaction between these molecule and carbon surface.

• 出版日期2013
• 单位华南理工大学