Protection of methanol synthesis catalyst?
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What are the better measures to protect the catalyst in methanol synthesis? ?
1. Pay attention to the amount of sulfur, chlorine and other poisonous substances in the raw gas, and do not poison the catalyst. 2. Pay attention to the rate of temperature and pressure rise and fall. Avoid catalyst breakage. 3. Pay attention to the pressure difference of the synthesis tower not to exceed the standard. 4. Pay attention to the temperature of the catalyst layer to avoid over-temperature. 5. Do not let the catalyst stay in the static hydrogen carbon gas for too long. 6. Note that the amount of hydrogen in the loop should not be too high, which may easily cause excessive reduction of the catalyst and affect the life of the catalyst. Do not make the CO concentration too high to ensure a certain CO2 concentration and avoid thermal aging of the catalyst. Personal opinion, please give me more advice.
One more thing, the speed during stamping must not be too fast to prevent the catalyst from being pulverized and the catalyst from being unloaded later.
The most fearful thing is that the sulfur is moderate. Coal is used as raw material, which has a high sulfur content. In the desulfurization section, conversion desulfurization, and fine desulfurization, the sulfur content reaches less than 0.1 ppm, using tannin wet desulfurization, conversion gas mesotemperature hydrolysis, dry desulfurization, and dry desulfurization. The comprehensive desulfurization plan of carbon plus desulfurization, composite activated carbon-dechlorination-decarbonylation metal-activated carbon fine desulfurization can ensure that the content of methanol synthesis raw material gas is between 0.05 and 0.1PPm, and ensure the long-term stability and normal operation of the synthesis catalyst. This is our factory's plan, :) This post was last edited by 361350036 on 2009-3-7 14:13 ]
One more thing: Nitrogen protection when parking to prevent oxidation. This post was last edited by Junzi Nanyu 2009-3-7 15:47 ]
In fact, the main reason is human. Under normal circumstances, if the gas in the front section is unqualified, it will not be sent to the synthesis. Most of the time, the leaders are eager to increase the amount. If we follow the operating procedures and replace them with nitrogen every time, we can ensure that the three-year catalyst will last for five years without any problems.