[Production Version] Daily Question 2018-4-13 (Fill-in-the-blank)
Thread Content
The main reasons for the deactivation of copper-based catalysts in methanol synthesis are ( ) ( ) ( ) ( ). _Poisoning_, _overheating, temperature, frequent fluctuations in pressure
Thermal deactivation, poisoning deactivation, carbon deposition deactivation, contamination deactivation
1. During use, the catalyst particles gradually grow larger, resulting in a decrease in specific surface area, and the catalyst undergoes normal aging and deactivation. 2. Catalyst poisoning, sulfur, chlorine, arsenic, etc. The presence of iron carbonyl and nickel carbonyl also affects the catalyst selectivity. 3. Catalyst fragmentation is caused by factors such as catalyst crushing, loading, too rapid changes in temperature and pressure, and frequent start-up and shutdown operations.
Thermal deactivation, carbon deposition, poisoning deactivation, contamination deactivation
Poisoning, overheating, frequent pressure fluctuations
Poisoning, overheating, temperature, frequent fluctuations in pressure
Poisoning, overheating, fluctuations in temperature and pressure
Poisoning, overheating, fluctuations in temperature and pressure
Poisoning, overheating, temperature, frequent fluctuations in pressure
Sulfur and sulfide poisoning, Chlorine and chloride poisoning, Carbonyl metal poisoning, Thermal inactivation
Poisoning_, _overheating, temperature, frequent fluctuations in pressure