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以超高交联吸附树脂为吸附剂,在固定床中研究了真空度、脱附温度、吸附初始浓度等因素对丙酮真空脱附性能的影响。实验结果表明,丙酮的脱附率随脱附温度和真空度增加而增加;丙酮初始吸附进气浓度越高,脱附率越高;在脱附温度60℃、真空度98kPa时,丙酮的脱附率可达85.3%。此外,开展了程序升温脱附实验,结果表明,超高交联吸附树脂吸附丙酮量越多其脱附速率越快,且最大脱附峰向低温区移动,这主要是因为微孔比中孔具有更大的吸附势,吸附在中孔内的丙酮更容易脱附。
The effect of vacuum degree, desorption temperature and initial concentration of adsorbent on the vacuum desorption performance of acetone was studied in a fixed bed using ultra-high cross-linked adsorption resin as adsorbent. The experimental results show that the desorption rate of acetone increases with the desorption temperature and the degree of vacuum increase. The higher the initial concentration of acetone is, the higher the desorption rate is. When the desorption temperature is 60 ℃ and the degree of vacuum is 98kPa, The rate of up to 85.3%. In addition, temperature-programmed desorption experiments were carried out. The results showed that the higher the adsorption amount of acetone, the faster the desorption rate, and the maximum desorption peak moved to the low temperature region. The main reason was that micropore was smaller than mesopores With a larger adsorption potential, acetone adsorbed in the mesopores is more easily desorbed.