Check the pre-loading catalyst inspection reports, the loading report and the start-up report; if there are no anomalies, then there is a good chance that the underperformance is due to either the catalyst or the actual operating conditions being different from those in the request. Check feedstock quality. If feedstock quality is within the normal range, contact the catalyst vendor with all the information at hand. Catalyst vendors usually have a root cause investigation strategy that will help you determine the root cause.
