Hydrogenation “One Question per Day” Question 1

Thread Content

What is the effect of hydrogen partial pressure on hydrogenation reactions? How to increase the hydrogen partial pressure? The hydrogen partial pressure depends on the pressure of the reaction system and the purity of hydrogen. An increase in the hydrogen partial pressure is beneficial for catalytic reactions, as it can suppress coking reactions and reduce the rate of catalyst deactivation ； On the other hand, it can increase the removal rate of impurities such as sulfur, nitrogen, and metals, while also promoting the hydrogenation and saturation of polycyclic aromatic hydrocarbons. Therefore, the hydrogen partial pressure in the reaction system should be increased as much as possible within the limits permitted by the equipment and operations. Increasing the hydrogen partial pressure can ① raise the overall system pressure ； ②Increase the purity of the hydrogen being added ； ③Increase the flow rate of recycled hydrogen ； ④Increase the purity of recycled hydrogen ； ⑤Increase the emission of waste hydrogen ； ⑥Reduce the amount of low-pressure gas at the inlet of the recycle hydrogen compressor.