Refinery

④　Neutralization and Precipitation: Achieve the desired catalyst properties by neutralizing the mixture with potassium carbonate, then precipitating it to form the base catalyst.
⑤　Drying and Roasting: The catalyst base is then carefully dried and roasted to achieve the desired properties.
⑥　Addition of Stabilizers: To enhance stability, add calcium aluminate cement and graphite, ensuring the catalyst's structural integrity.
⑦　Mixing, Kneading, and Molding: Carefully mix, knead, and mold the catalyst material to the desired shape for uniform performance.

In hydrocarbon steam reforming to ammonia and methanol syngas plants, the purpose of the secondary steam reforming is to further reform the residual methane of the primary reforming gas to meet the syngas requirements. The secondary conversion is the worst working condition equipment, the catalyst in the conversion furnace for a long time in the high temperature and high pressure conditions. 

At the top of the secondary steam reforming furnace, the temperature of the oxygen (air) mixed with the primary steam reforming gas is about 1260°C. If there is any problem with the mixer or the airflow distribution is not uniform, the local maximum temperature can be up to 1980°C. The catalyst in the secondary steam reforming furnace is under such high temperature and pressure conditions. The catalyst of the secondary steam reforming is equivalent to being sintered under such working conditions, and the pore structure, specific surface and other physical properties of the catalyst may undergo large changes, which will have a greater impact on the performance of the catalyst, especially the activity.