Requirements for the use of hydrocracking catalysts

There are four indicators of the performance of hydrocracking catalysts in use, namely activity, selectivity, stability and mechanical strength.

1)Activity

Catalyst activity refers to the ability to facilitate chemical reactions and is usually expressed in terms of the conversion rate achieved by the feedstock under certain conditions. Increasing the activity of the catalyst can moderate the operating conditions of hydrocracking while maintaining a certain conversion rate.

Catalyst activity decreases over time and is generally increased by raising the temperature to maintain a certain conversion rate.

The catalyst activity decreases with time and is generally increased to maintain a certain conversion rate. Therefore, the initial reaction temperature can also be used to indicate the catalyst activity.

2)Selectivity

The selectivity of a hydrocracking catalyst can be expressed as a ratio of the yield of the target product to the yield of the non-target product. An increase in selectivity will result in a higher yield of the target product.

3)Stability

The stability of a catalyst is an indication of its operating cycle and service life, usually expressed as the increase in reaction temperature necessary to maintain catalyst activity and selectivity over a specified period of time.

4)Mechanical Strength

The catalyst must be strong enough to avoid crushing during loading, unloading and use, causing blockages in the pipeline, increased pressure drop in the bed and resulting in accidents.