活性炭对乙酸乙酯的吸附和再生  

Adsorption of Ethyl Acetate on Activated Carbons and Their Regeneration

作　　者：张宝[1] 刘志广[1] 王新平[1] 

机构地区：[1]大连理工大学化工学院精细化工国家重点实验室,大连116024

出　　处：《应用化学》2009年第3期337-341,共5页Chinese Journal of Applied Chemistry

摘　　要：研究了活性炭的孔结构和表面化学性质及水蒸气存在对活性炭吸附乙酸乙酯的影响。结果表明,活性炭的微孔(<1.70 nm)结构特征是活性炭吸附乙酸乙酯的主要因素,其表面性质对乙酸乙酯的吸附没有明显影响。40℃下,具有丰富微孔的椰壳活性炭AC和Y2在乙酸乙酯入口体积分数为0.30%时,对乙酸乙酯的饱和吸附量分别为0.31和0.28 g/g。在相对湿度低于40%时,活性炭对乙酸乙酯的饱和吸附量仍可达干燥条件下相应值的90%。在180℃加热时可将吸附在活性炭上的乙酸乙酯有效地回收。活性炭的吸附性能不受再生气体中所含少量O2的影响。活性炭经6次再生循环使用,未发现其对乙酸乙酯的吸附性能发生变化。Adsorption of ethyl acetate（EA） on activated carbons at 40℃ was investigated to find the effects of pore structure, surface properties and relative humidity on the adsorption of EA. It was found that the adsorption capacity of activated carbons for EA is mainly determined by mieropore structure （ 〈 1.70 nm） but not surface chemistry of the adsorbents. The saturated adsorption amounts of EA on the activated carbons AC and Y2 with abundant micropore area were 0. 31 g/g and 0. 28 g/g, respectively, in the gas mixture of EA/N2 with a concentration of 0. 30% in volume percentage （φ（EA））. A saturated adsorption amount as high as 90% of that achieved under dry conditions was still obtained even when an adsorption experiment was conducted at a relative humidity of 40%. Regeneration of activated carbon and the recovery of EA could be effectively completed by heating the absorbent to 180 ℃ after adsorption. The adsorption property of the adsorbent for EA was not influenced by little O2 in the gas flow used for the adsorbent regeneration. Activated carbon could be well used repeatedly as an adsorbent for EA adsorption after the regeneration without change in property for EA adsorption.

关 键 词：吸附 乙酸乙酯 活性炭 再生 回收 

分 类 号：O647.3[理学—物理化学]