تأثير المعالجة الفيزيو_كيميائية على الحفاز المستخدم في وحدة معالجة المقطرات النفطية الثقيلة

We studied the influence of physio-chemical and thermal treatment on the textural of spent catalyst, used in heavy oil distillation treatment unit in Banias Refinery. We determined the porosity structure parameters by analyzing adsorption data of nitrogen gas applied on samples of catalyst at different temperatures. We found that the thermal treatment mainly leads to a decrease in the specific surface area, the highest decrease was at 600 0C. The influence on the mean porosis radius was different. The chemical treatment with naphtha and acetic acid followed by thermal treatment lead to clear changes of texture particularly in the specific surface area. A remarkable increase in the specific surface area was of 0.3M of acetic acid and 4000C. The increase of thermal treatment temperature leads to a decrease in the specific surface area. Thermo-chemical treatment showed variable effects on the porosis radius average.