Competitive interactions in catalytic hydroprocessing of middle distillates

摘要

AbstractThe influence of nitrogen and oxygen containing heterocyclic compounds on the hydrogenation of middle distillates from the hydrocracked product of coal liquefaction processes has been investigated. Using mixtures of appropriate model compounds, hydrogenation activity was found to be strongly depressed with increasing concentration of N‐compounds in the range 0–0.14 wt nitrogen. The extent of deactivation was found to be dependent on the balance between basicity and HDN rate. The relative reactivities of model compounds added to actual middle distillates were retained, but rates were lower. Hydrogen activity was also decreased, but to a lesser extent, by increasing the concentration of O‐compounds in the range 0–0.45 wt oxygen. Above a certain catalyst dependent oxygen concentration, the activity did not decrease