Selection of diol catalyst reduction method (high hydrogen, low hydrogen)

For older ammonia synthesis plants, alcohol alkylation is generally used for decarburization. To avoid the issues related to the source of hydrogen for low-hydrogen reduction and the tendency of high-hydrogen environments to cause overheating, a compromise approach is adopted for reduction: namely, using high pressure with low hydrogen.

When choosing a method for reducing the binol catalyst, the following factors can be taken into consideration: 1. Stability in low-hydrogen systems and ease of control: Low-hydrogen reduction refers to using less hydrogen to achieve catalyst reduction. Since hydrogen is a flammable gas, controlling the amount of hydrogen used can reduce safety risks, and it also makes it easier to control the conditions and parameters of the reaction. 2. High hydrogen levels can easily cause the bed temperature to become too high, leading to the destruction of the catalyst: The high-hydrogen reduction method refers to the use of an excessive amount of hydrogen to achieve catalyst reduction. Although high hydrogen reduction can reduce the catalyst more rapidly and help improve reaction efficiency, excessive hydrogen may cause the bed temperature to rise, even leading to the destruction of the catalyst. Therefore, when selecting a reduction method, it is necessary to take into comprehensive consideration the safety and stability of the system, as well as the lifespan and efficiency of the catalyst. If high stability is required and good temperature control is possible, the low-hydrogen reduction method can be chosen ； If reaction efficiency is of paramount importance and temperature can be effectively controlled, the high-hydrogen reduction method can be considered. .