New catalysts for low and medium pressure hydretreating: A catalyst platform provides higher performance in middle distillate hydrotreating applications with limited hydrogen,difficult feedstocks and severe operating conditions

摘要

In recent years,new and improved hydrotreating catalysts have been introduced to the market primarily to serve operations with high pressure and hydrogen availability.On the other hand,catalyst innovation for operations limited by hydrogen,such as low and medium pressure middle distillates-hydro-treating(MD-HT),has been slower.The challenge is to be able to deliver both premium activity and stability in applications with limited hydrogen,difficult feedstocks and severe operating conditions in general.To improve stability for hydrogen constrained MD-HT operations,suppliers followed a defensive approach and sought to develop moderately active catalyst systems with low selectivity for nitrogen removal.The drawback in adopting such catalysts is that,while benefiting from their stability in operation,refiners are still not able to maximise activity and thereby extract full operating potential and profit from their critical units.