Q&A on Purification Technology Version [033]
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Why is steam added during the reduction of medium-temperature catalysts? How much is appropriate to add? Because using dry gas for reduction causes the medium-temperature catalyst to be over-reduced. The reduced catalyst (Fe3O4) is over-reduced to form ferrous oxide and metallic iron, as well as iron carbide, which causes changes in the catalyst’s structure, leading to deactivation, pulverization, and increased resistance. The most effective way to prevent excessive reduction is to introduce a certain amount of water vapor from the beginning of the reduction process. Generally not less than 10%. As the transformation reaction increases, the proportion of water vapor can increase accordingly. Coalification Region Purification Technology Edition – 2017 Coal Chemical Industry “My Technical Upgrades” Contest (Large prizes available) http://bbs.hcbbs.com/thread-1786290-1-1.html Registration for Chemical Engineers – Experience Sharing Event “Learning from Others’ Experiences” http://bbs.hcbbs.com/thread-1808158-1-1.html
Because using dry gas for reduction causes the medium-temperature catalyst to be over-reduced. The reduced catalyst (Fe3O4) is over-reduced to form ferrous oxide and metallic iron, as well as iron carbide, which causes changes in the catalyst’s structure, leading to deactivation, pulverization, and increased resistance. The most effective way to prevent excessive reduction is to introduce a certain amount of water vapor from the beginning of the reduction process. Generally not less than 10%. As the transformation reaction increases, the proportion of water vapor can increase accordingly.
Because using dry gas for reduction causes the medium-temperature catalyst to be over-reduced. The reduced catalyst (Fe3O4) is over-reduced to form ferrous oxide and metallic iron, as well as iron carbide, which causes changes in the catalyst’s structure, leading to deactivation, pulverization, and increased resistance. The most effective way to prevent excessive reduction is to introduce a certain amount of water vapor from the beginning of the reduction process. Generally not less than 10%. As the transformation reaction increases, the proportion of water vapor can increase accordingly.
Because using dry gas for reduction causes the medium-temperature catalyst to be over-reduced. The reduced catalyst (Fe3O4) is over-reduced to form ferrous oxide and metallic iron, as well as iron carbide, which causes changes in the catalyst’s structure, leading to deactivation, pulverization, and increased resistance. The most effective way to prevent excessive reduction is to introduce a certain amount of water vapor from the beginning of the reduction process. Generally not less than 10%. As the transformation reaction increases, the proportion of water vapor can increase accordingly.
The quality of the catalyst activity in the medium-temperature conversion process has a direct impact on the stable operation of this system; it is also crucial for energy savings and the stable functioning of subsequent systems. Only by identifying the factors that affect the catalyst activity and taking appropriate protective measures during use can the catalyst perform at its best, extending its service life and reducing production costs. . First, heat it to around 120 degrees using air, because using steam directly will cause condensation on the catalyst, thereby damaging it. Add more steam to raise the temperature to around 330 to 360 degrees.
Because using dry gas for reduction causes the medium-temperature catalyst to be over-reduced. The reduced catalyst (Fe3O4) is over-reduced to form ferrous oxide and metallic iron, as well as iron carbide, which causes changes in the catalyst’s structure, leading to deactivation, pulverization, and increased resistance. The most effective way to prevent excessive reduction is to introduce a certain amount of water vapor from the beginning of the reduction process. Generally not less than 10%. As the transformation reaction increases, the proportion of water vapor can increase accordingly.
Because using dry gas for reduction causes the medium-temperature catalyst to be over-reduced. The reduced catalyst (Fe3O4) is over-reduced to form ferrous oxide and metallic iron, as well as iron carbide, which causes changes in the catalyst’s structure, leading to deactivation, pulverization, and increased resistance. The most effective way to prevent excessive reduction is to introduce a certain amount of water vapor from the beginning of the reduction process. Generally not less than 10%. As the transformation reaction increases, the proportion of water vapor can increase accordingly.
Used to adjust the water vapor ratio; if water is added directly, heat is required for the water to turn into steam
Used to adjust the water vapor ratio; if water is added directly, heat is required for the water to turn into steam
Used to adjust the water vapor ratio; if water is added directly, heat is required for the water to turn into steam