Due to the success of the use of energy crop oils in the production of biodiesel, the heavy cultivation of these plants in many countries is being promoted. However, it may lead to the problem with its associated waste shells, which contain low nutrient; consequently, they are not suitable for use as an agricultural fertilizer, and they are abundant in hemicellulose, cellulose, and lignin resulting in difficult to digest or degrade. Thus, a possible solution for this waste is to convert it into carbon-based adsorbents. Specifically, activated carbon is a product with a high added value, widely used material due to its adsorbent properties. These adsorbents could be used for reducing the free fatty acids content presents in oils intended for the biodiesel production. The presence of free fatty acids in the oils is undesirable for biodiesel production due to a performance reduction in the transesterification reaction. The aim of this work is to use biomass waste such as Jatropha curcas and Pongamia pinnata shells for the preparation of carbon-based materials (activated carbons, Ca(OH)₂ supported on activated carbons and charcoals) and to study the possibility of using them as adsorbents for reducing the free fatty acids content of Jatropha curcas and Pongamia pinnata oils.

由于在生物柴油生产中成功使用了能源作物油，许多国家正在大力推广这些植物的繁重栽培。但是，它可能导致与其相关的废物壳相关的问题，这些废物壳中的营养成分很低。因此，它们不适合用作农业肥料，并且它们富含半纤维素，纤维素和木质素，导致难以消化或降解。因此，针对这种废物的可能解决方案是将其转化为碳基吸附剂。具体而言，活性炭由于具有吸附性，因此是具有高附加值的产品，被广泛使用。这些吸附剂可用于减少存在于用于生物柴油生产的油中的游离脂肪酸含量。由于酯交换反应的性能降低，因此油中游离脂肪酸的存在对于生物柴油的生产而言是不希望的。这项工作的目的是利用生物质废物，例如麻疯树和樟子松壳，用于制备碳基材料（活性炭，负载在活性炭和木炭上的Ca（OH）₂），并研究使用它们作为吸附剂降低麻疯树中游离脂肪酸含量的可能性和Pongamia pinnata油。