Abstract
The traditional extraction of essential oils exposes plant material to high temperatures for hours, which may lead to the production of artifacts, even originating unpleasant odors and loss of quality. In addition, this procedure is energy-consuming, which makes it an expensive method. The present work has been focused on a method that combines hydrodistillation and subsequent extraction with water vapor and volatiles of essential oil in the same apparatus, that we called non-conventional hydrodistillation (NCH). Three aromatic plants were used: Rosmarinus officinalis leaves (X1), Lavandula angustifolia flowers (X2), and Citrus aurantium leaves (X3). In the processes, the operating parameters as vegetal mass moisture, total sum vegetal mass used, and water flux rate have been fixed at 17 %, 100 g, and 0.97 L/h, respectively. The extraction process was made using mixture experimental design, taking into account the plants used (one plant, binary and ternary combinations); the position of the plants in the apparatus to study essential oils’ yields. The results showed that NCH of binary and ternary mixtures allows obtaining higher yields than expected with values superior to 2 % for the following combinations: X1:X2 (50:50), X1:X3 (50:50); X1:X2:X3 (33:33:33) and X1:X2:X3 (0.67: 0.16:0.16). The new NCH had a high kinetic coefficient k (2.98) and lower extraction time (70 min) than conventional hydrodistillation (CH), which means less energy consumption.
2020年12月8日目前的工作集中在一种方法上,该方法在同一设备中将加氢蒸馏和随后的萃取与水蒸气和精油挥发物结合在一起,我们称之为非常规加氢蒸馏(NCH)。使用了三种...两种精油提取方法：常规和非常规加氢蒸馏; Sara El kharraf, Abdellah Farah, Maria Graça Miguel, Soukaina El-Guendouz, El Mestafa El Hadrami; J. Essent. Oil Bear. Plants; Journal of Essential Oil Bearing Plants; X-MOL摘要 传统的香精油提取将植物材料暴露于高温下数小时，这可能导致人造产物的产生，甚至产生难闻的气味并降低质量。另外，该过程耗能，这使其成为昂贵的方法。目前的工作集中在一种方法上，该方法在同一设备中将加氢蒸馏和随后的萃取与水蒸气和精油挥发物结合在一起，我们称之为非常规加氢蒸馏（NCH）。使用了三种芳香植物：迷迭香叶（X 1），薰衣草花（X 2）和桔皮叶（X 3））。在这些过程中，诸如植物质量水分，所使用的总植物质量和水通量速率的操作参数分别固定为17％，100 g和0.97 L / h。考虑到所用植物（一种植物，二元和三元组合），使用混合物实验设计进行了提取过程。植物在设备中研究精油产量的位置。结果表明，对于以下组合，二元和三元混合物的NCH可以获得比预期更高的产率，其值优于2％：X 1：X 2（50:50），X 1：X 3（50:50）；X 1：X 2：X 3（33:33:33）和X 1：X2：X 3（0.67：0.16：0.16）。与常规加氢蒸馏（CH）相比，新的NCH具有较高的动力学系数k（2.98）和较短的萃取时间（70 min），这意味着能耗更低。两种精油提取方法：常规和非常规加氢蒸馏,Journal of Essential Oil Bearing Plants
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