جداسازي ناخالصيها از كك نفتي به روش اسيدشويي و بررسي تيوري اثرهاي آن بر خواص گرافيت هسته اي

The Impurities Removal from Petroleum Cokes by Acid Leaching and Theoretical Investigation of its Effects on Nuclear Graphite Properties

In this research, the separation of impurities from calcined petroleum coke by heat leaching and column leaching in nitric acid medium was experienced. In this work, 1) the influence of some principal parameters such as temperature, time and particle size on the separation efficiency, II) the influence of this process on the cementation coefficient, and neutron poisoning factor of the coke impurities were studied. The results of these experiments indicated that by decreasing the size particles and increasing the temperature in a long time, the efficiency separation of the elements will be increased. Also, the column-leaching process reduces the poisoning factor of the elements and improves the coke cementation coefficient. Additionally, the column leaching method is a more attractive due to: needs for less energy, needs more feasible to apply in a large scale, and easy removal impurities. Therefore, this method could be considered as economical aspect.