The above three points are the conventional factors affecting the reaction speed, the so-called catalytic hydrogenation reaction is too slow generally refers to the problem of slow reaction even after adjusting the above factors to the near limit, which is the focus of this problem. At these times, it is already difficult to solve the problem by theoretical inference alone, and the main influencing factors are summarized through experiments, including

The most common problem in hydrogenation catalysis is that the reaction is slow, or even stops, and the catalyst must be filtered out and the filtrate replenished with new catalyst to continue the reaction.