The concentration of oxygenated monoterpenes (oxyterpenes) in orange peel oil by supercritical fluid adsorption (SFA) was investigated varying pressure (10–24 MPa) and temperature (40–60 ºC) and using silica aerogels as adsorbent. Dynamic solubility experiments were conducted to obtain the solubility of the monoterpenes in supercritical CO, revealing that it increases with pressure regardless of temperature. For SFA, 10 MPa and 60 ºC was the most appropriate condition to concentrate oxyterpenes, leading to the lowest solubility of oxyterpenes and highlighting the advantage of lower densities for SFA’s selectivity. Furthermore, this condition yielded the highest concentration factors for oxyterpenes (4.3 for linalool and 6.5 for α-terpineol) within the 80–90 min interval. These findings contribute with valuable insights to SFA processes to concentrate oxyterpenes from orange peel oil, which has the potential to enhance the market value and functionality of this important product from citrus industries.

中文翻译：

---

超临界流体吸附浓缩橙皮油中的氧萜芳樟醇和α-萜品醇


通过改变压力（10-24 MPa）和温度（40-60 ℃）并使用二氧化硅气凝胶作为吸附剂，研究了超临界流体吸附（SFA）在橙皮油中含氧单萜（氧萜）的浓度。进行动态溶解度实验以获得单萜在超临界 CO 中的溶解度，结果表明，无论温度如何，它都会随着压力而增加。对于 SFA，10 MPa 和 60 ℃ 是浓缩氧萜的最合适条件，导致氧萜的溶解度最低，并突出了较低密度对 SFA 选择性的优势。此外，这种条件在 80-90 分钟的时间间隔内产生了最高的氧萜浓度因子（芳樟醇为 4.3，α-萜品醇为 6.5）。这些发现为 SFA 从橙皮油中浓缩氧萜的工艺提供了宝贵的见解，有可能提高柑橘行业这一重要产品的市场价值和功能。