Factors affecting catalyst deactivation in formaldehyde production
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Factors affecting catalyst deactivation in formaldehyde production: 1. Influence of raw materials. Is the methanol up to standard? Is the air and other ingredients clean? Do they contain elements such as iron and sulfur? 2. Influence of equipment. Is it level? What about the igniters and the internal structure of the equipment? 3. Influence of human factors. Is the operation smooth? What is the purging time before ignition? How fast is the temperature rise? What is the oxygen temperature?
I think the key points are three: the purification of the feed gas, as well as the temperature and output of the oxidation furnace. If refined alcohol is used, there’s no problem at all using the silver electrolysis catalyst for 3–5 months without exceeding the production capacity
1. A sudden power outage during normal production; if the outage lasts for too long, when power is restored and the equipment is restarted, a drop in oxygen temperature to the level required for ignition can have a significant impact on the catalyst’s activity. 2. Excessive impurities in the raw materials, as well as poor filtration of methanol. 3. Unstable control during production, resulting in an excessive oxygen temperature that causes crystallization on the surface of the silver layer
It is mainly the raw materials and impurities in the steam that have a significant impact on the catalyst; once the catalyst is poisoned, the conversion efficiency is poor
The alcohol content in the products manufactured by our factory is generally around 1%
Actually, all three of these points are very important and need to be taken into consideration.
Factors affecting catalyst deactivation in formaldehyde production: 1. Sudden power outages during normal operation; if the outage lasts for too long, when power is restored and the system is restarted, a drop in oxygen temperature to the level required for ignition has a significant impact on catalyst activity. 2. Excessive impurities in the raw materials, as well as poor filtration of methanol. 3. Unstable control during production, leading to excessive oxygen temperatures that cause crystallization on the surface of the silver layer. 4. The moisture content in the recycled gas must not be too high – this is very important. Additionally, methanol must be completely vaporized (this is a technology developed by Perstorp in Sweden)