One Question per Day: Methanol Technology Exchange Edition 20180629
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Learn from the advanced practices of the *Brothers section; there are rewards for correct answers – any answer earns a reward, allowing us to grow and mature through these Q&A sessions. Brief answer: Feel free to add more. What are the measures to extend the service life of methanol synthesis catalysts? 1. Try to eliminate from the syngas any substances that can poison the catalyst, such as sulfides and iron-nickel carbonyls. 2. When introducing the new catalyst, the production load should be controlled at 70-90% to prevent overloading the system. 3. When introducing a new catalyst, low-temperature operation should be employed to make full use of the catalyst’s activity at low temperatures and prevent overheating. 4. The reduction of the new catalyst must be carried out strictly in accordance with the procedures provided by the catalyst manufacturer, to prevent the bed temperature from rising too high due to an excessive reduction rate. The reduction must be thorough. 5. Control a higher space velocity in the synthesis tower to prevent the catalyst from overheating. 6. Control the appropriate H/C ratio. 7. Control the carbon dioxide content in the inlet gas of the synthesis tower at 3–5%, thereby slowing down the reaction rate appropriately.
Correct 1: Try to eliminate from the syngas any substances that can poison the catalyst, such as sulfides and iron-nickel carbonyls. 2. When introducing the new catalyst, the production load should be controlled at 70-90% to prevent overloading the system. 3. When introducing a new catalyst, low-temperature operation should be employed to make full use of the catalyst’s activity at low temperatures and prevent overheating. 4. The reduction of the new catalyst must be carried out strictly in accordance with the procedures provided by the catalyst manufacturer, to prevent the bed temperature from rising too high due to an excessive reduction rate. The reduction must be thorough. 5. Control a higher space velocity in the synthesis tower to prevent the catalyst from overheating. 6. Control the appropriate H/C ratio. 7. Control the carbon dioxide content in the inlet gas of the synthesis tower at 3–5%, thereby slowing down the reaction rate appropriately.
Measures to extend the service life of methanol synthesis catalysts include: 1. Striving to eliminate substances in the syngas that can poison the catalyst, such as sulfides and iron-nickel carbonyls. 2. When introducing the new catalyst, the production load should be controlled at 70-90% to prevent overloading the system. 3. When introducing a new catalyst, low-temperature operation should be employed to make full use of the catalyst’s activity at low temperatures and prevent overheating. 4. The reduction of the new catalyst must be carried out strictly in accordance with the procedures provided by the catalyst manufacturer, to prevent the bed temperature from rising too high due to an excessive reduction rate. The reduction must be thorough. 5. Control a higher space velocity in the synthesis tower to prevent the catalyst from overheating. 6. Control the appropriate H/C ratio. 7. Control the carbon dioxide content in the inlet gas of the synthesis tower at 3–5%, thereby slowing down the reaction rate appropriately.