Preparation of Improved Hydrotreating Catalysts Using Modified Supports and an Impregnation Process

تعتبر المعالجة الهيدروجينية باستخدام المواد الحفازة ذات أهمية كبيرة في الصناعات البترولية وذلك لتحسين جودة وقود البترول، كما ان الحاجة تدعو الى إنتاج وقود نقل محسن ذو تأثير محدود على البيئة بإزالة الكبريت والنتروجين والمركبات العطرية. في هذا المشروع سيتم تأويج أسلوب إضافة المكونات المنشطة للمواد الحفازة، ومعرفة ميكانيكية وامتصاص هذه المكونات، ثم فحص خواص المواد الحفازة المحضرة ونشاطاتها بالنسبة لإزالة الكبريت والهيدروجين ومقارنتها بالمواد التجارية للوصول الى مواد حفازة مطورة.

Hydrotreating catalysts and processes have gained considerable importance in the petroleum refining industry in recent years, largely because of growing environmental concerns to clean up and improve the quality of various petroleum based fuels and partly due to an increasing need for processing heavy oils to more valuable distillate products. Intensive efforts have been made to improve the performance of hydrotreating catalysts for residual oil conversion as well as for the production of environmentally friendly transportation fuels by deep desulfurization, denitrogenation and aromatics hydrogenation. The research work proposed in this proposal deals with the potential application of some new support materials in preparing improved hydrotreating catalysts. The emphasis of the study will be on the optimisation of the impregnation procedure for loading the active catalyst components and promoters on different supports with maximum dispersion of the active phases. The interaction and adsorption mechanism of the active catalyst components with various support materials will also be investigated as part of the study. The prepared catalysts will be characterized and then hydrodesulfurization and hydrodenitrogenation activity will be tested and compared with that of a reference commercial hydrotreating catalyst. The proposed research is expected to lead to the development of more active hydrotreating catalysts through the use of new support materials as well as through improved dispersion of the active phases on the surface of the support.